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Liao CH, Chiang CY, Iputera K, Hu SF, Liu RS. Homogeneous Catalytic Process of a Heterogeneous Ru Catalyst in Li-O 2 via X-ray Nanodiffraction Observation. ACS Appl Mater Interfaces 2024; 16:8783-8790. [PMID: 38335216 DOI: 10.1021/acsami.3c16966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2024]
Abstract
In recent years, lithium oxygen batteries (Li-O2) have received considerable research attention due to their extremely high energy density. However, the poor conductivity and ion conductivity of the discharge product lithium peroxide (Li2O2) result in a high charging overpotential, poor cycling stability, and low charging rate. Therefore, studying and improving catalysts is a top priority. This study focuses on the commonly used heterogeneous catalyst ruthenium (Ru). The local distribution of this catalyst is controlled by using sputtering technology. Moreover, X-ray nanodiffraction is applied to observe the relationship between the decomposition of Li2O2 and the local distribution of Ru. Results show that Li2O2 decomposes homogeneously in liquid systems and heterogeneously in solid-state systems. This study finds that the catalytic effect of Ru is related to electrolyte decomposition and that its soluble byproducts act as electron acceptors or redox mediators, effectively reducing charging overpotential but also shortening the cycle life.
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Affiliation(s)
- Chung-Hao Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ching-Yu Chiang
- National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
| | - Kevin Iputera
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
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2
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Liao YK, Liu RS, Yao ST, Hu SF. In Situ and Low-Cost Improvement of the Lithium Anode Interface in Garnet-Type Solid-State Electrolytes. ACS Appl Mater Interfaces 2023. [PMID: 38016108 DOI: 10.1021/acsami.3c13222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
In recent years, the development of electric vehicles and environmental concerns have made necessary improvements in the energy density and safety of lithium-ion batteries. Therefore, the development of all-solid-state lithium-ion batteries (ASSLIBs) has become imperative. One advantage of ASSLIBs is their potential for downsizing with the use of lithium metal as the anode. However, in this study, a garnet-type solid electrolyte (Li6.75La3Zr1.75Ta0.25O12) was used, which has low reactivity with lithium metal. Thus, interface modification using CaCl2 was employed to form a Li-Ca-Cl composite anode. The interfacial resistance was remarkably reduced to 7 Ω cm2, and the symmetric cell exhibited stable cycling for 1200 h at room temperature and a current density of 0.1 mA cm-2. The voltage ranged from ±15 to ±16 mV. The full cell demonstrated a high initial discharge capacity of 149.2 mA h g-1 and a Coulombic efficiency of 98.0% while maintaining a discharge capacity retention of 91.3% after 100 cycles. These findings lay a solid foundation for future commercial applications as interface modification was achieved through a simple spin-coating process using low-cost CaCl2 (0.7 USD g-1).
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Affiliation(s)
- Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
| | | | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
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3
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Srivastava P, Liao YK, Iputera K, Hu SF, Liu RS. Robust and Intimate Interface Enabled by Silicon Carbide as an Additive to Anodes for Lithium Metal Solid-State Batteries. ChemSusChem 2023; 16:e202300504. [PMID: 37505227 DOI: 10.1002/cssc.202300504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 06/06/2023] [Indexed: 07/29/2023]
Abstract
Garnet-type solid-state electrolytes are among the most reassuring candidates for the development of solid-state lithium metal batteries (SSLMB) because of their wide electrochemical stability window and chemical feasibility with lithium. However, issues such as poor physical contact with Li metal tend to limit their practical applications. These problems were addressed using β-SiC as an additive to the Li anode, resulting in improved wettability over Li6.75 La3 Zr1.75 Ta0.25 O12 (LLZTO) and establishing an improved interfacial contact. At the Li-SiC|LLZTO interface, intimacy was induced by a lithiophilic Li4 SiO4 phase, whereas robustness was attained through the hard SiC phase. The optimized Li-SiC|LLZTO|Li-SiC symmetric cell displayed a low interfacial impedance of 10 Ω cm2 and superior cycling stability at varying current densities up to 5800 h. Moreover, the modified interface could achieve a high critical current density of 4.6 mA cm-2 at room temperature and cycling stability of 1000 h at 3.5 mA cm-2 . The use of mechanically superior materials such as SiC as additives for the preparation of a composite anode may serve as a new strategy for robust garnet-based SSLMB.
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Affiliation(s)
- Pavitra Srivastava
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106, Taiwan
| | - Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei, 116, Taiwan
| | - Kevin Iputera
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei, 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106, Taiwan
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4
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Liao YK, Liu RS, Hu SF. Synergistic Effect of the Anode Interface of Garnet-Type All-Solid-State Batteries. ACS Appl Mater Interfaces 2023; 15:44413-44421. [PMID: 37683282 DOI: 10.1021/acsami.3c06527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/10/2023]
Abstract
Next-generation lithium-ion batteries must have high energy density and safety, making the development of all-solid-state batteries imperative. One of the biggest advantages of an all-solid-state lithium-ion battery (ASSLIB) is that its alloy uses lithium metal as an anode while ignoring its flammability and other dangers. Herein, high-conductivity garnet-type Li6.75La3Zr1.75Ta0.25O12 (LLZTO) was chosen as the solid electrolyte part of an all-solid-state battery. A composite anode was formed by melting Li and MXene-MAX together, reducing the interface impedance from 566 to 55 Ω cm2. The Li-MXene|LLZTO|LFP full battery displayed a high initial discharge capacity of 163.0 mAh g-1 and a Coulombic efficiency of 97.0% and maintained 90.2% of its discharge capacity over 100 cycles, but it did not maintain a good overpotential. Therefore, the synergistic effect of Li-MXene-Pt will highly improve the performance of the full battery because of its high initial discharge capacity of 150.0 mAh g-1 and Coulombic efficiency of 95.5%, discharge capacity maintained at 93.3% over 100 cycles, and low overpotential of 0.04 V.
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Affiliation(s)
- Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
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Sarkar A, Dharmaraj VR, Yi CH, Iputera K, Huang SY, Chung RJ, Hu SF, Liu RS. Recent Advances in Rechargeable Metal-CO 2 Batteries with Nonaqueous Electrolytes. Chem Rev 2023; 123:9497-9564. [PMID: 37436918 DOI: 10.1021/acs.chemrev.3c00167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
This review article discusses the recent advances in rechargeable metal-CO2 batteries (MCBs), which include the Li, Na, K, Mg, and Al-based rechargeable CO2 batteries, mainly with nonaqueous electrolytes. MCBs capture CO2 during discharge by the CO2 reduction reaction and release it during charging by the CO2 evolution reaction. MCBs are recognized as one of the most sophisticated artificial modes for CO2 fixation by electrical energy generation. However, extensive research and substantial developments are required before MCBs appear as reliable, sustainable, and safe energy storage systems. The rechargeable MCBs suffer from the hindrances like huge charging-discharging overpotential and poor cyclability due to the incomplete decomposition and piling of the insulating and chemically stable compounds, mainly carbonates. Efficient cathode catalysts and a suitable architectural design of the cathode catalysts are essential to address this issue. Besides, electrolytes also play a vital role in safety, ionic transportation, stable solid-electrolyte interphase formation, gas dissolution, leakage, corrosion, operational voltage window, etc. The highly electrochemically active metals like Li, Na, and K anodes severely suffer from parasitic reactions and dendrite formation. Recent research works on the aforementioned secondary MCBs have been categorically reviewed here, portraying the latest findings on the key aspects governing secondary MCB performances.
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Affiliation(s)
- Ayan Sarkar
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | | | - Chia-Hui Yi
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Kevin Iputera
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shang-Yang Huang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Ren-Jei Chung
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan
- High-value Biomaterials Research and Commercialization Center, National Taipei University of Technology (Taipei Tech), Taipei 10608, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
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Huang WT, Su TY, Chuang JH, Lu KM, Hu SF, Liu RS. Plant Growth Modeling and Response from Broadband Phosphor-Converted Lighting for Indoor Agriculture. ACS Appl Mater Interfaces 2023. [PMID: 37364173 DOI: 10.1021/acsami.3c06454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
The rapid change in population, environment, and climate is accompanied by the food crisis. As a new type of farming, indoor agriculture opens the possibility of addressing this crisis in the future. In this study, a phosphor-converted light-emitting diode (pc-LED), as energy-saving lighting for indoor agriculture, was used to evaluate the response and effect on the growth of Lactuca sativa. Red phosphors, SrLiAl3N4:Eu2+ (SLA) and CaAlSiN3:Eu2+ (CASN), were characterized and analyzed with crystal structure, morphology, and optical properties. Eu2+-doped phosphors provided the red emission of around 650 nm which is highly matched with the absorption of chlorophyll. Under the same luminescence intensity, broader emission of CASN pc-LED demonstrated a 100% increase of photosynthetically active photon flux density and 130% promotion of plant weight than the SLA pc-LED, which reflected the positive result of the carbon fixation. The chlorophyll and nitrate responses have also revealed the effect of broader red light on indoor agriculture.
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Affiliation(s)
- Wen-Tse Huang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Ting-Yi Su
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | | | - Kuang-Mao Lu
- Everlight Electronics Co., Ltd., New Taipei City 238, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 106, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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Jena A, Bazri B, Tong Z, Iputera K, Huang JY, Wei DH, Hu SF, Liu RS. Controlling Cell Components to Design High-Voltage All-Solid-State Lithium-Ion Batteries. ChemSusChem 2023; 16:e202202151. [PMID: 36634026 DOI: 10.1002/cssc.202202151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 01/11/2023] [Indexed: 06/17/2023]
Abstract
All-solid-state batteries with solid ionic conductors packed between solid electrode films can release the dead space between them, enabling a greater number of cells to stack, generating higher voltage to the pack. This Review is focused on using high-voltage cathode materials, in which the redox peak of the components is extended beyond 4.7 V. Li-Ni-Mn-O systems are currently under investigation for use as the cathode in high-voltage cells. Solid electrolytes compatible with the cathode, including halide- and sulfide-based electrolytes, are also reviewed. Discussion extends to the compatibility between electrodes and electrolytes at such extended potentials. Moreover, control over the thickness of the anode is essential to reduce solid-electrolyte interphase formation and growth of dendrites. The Review discusses routes toward optimization of the cell components to minimize electrode-electrolyte impedance and facilitate ion transportation during the battery cycle.
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Affiliation(s)
- Anirudha Jena
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei, 106, Taiwan
- School of Applied Sciences, Kalinga Institute of Industrial Technology, Deemed to be University Bhubaneswar, Odisha., 751024, India
| | - Behrouz Bazri
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei, 106, Taiwan
| | - Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Kevin Iputera
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Jheng-Yi Huang
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Da-Hua Wei
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei, 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei, 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
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Li YC, Wang Q, Li MG, Hu SF, Xu GY. A paraventricular hypothalamic nucleus input to ventral of lateral septal nucleus controls chronic visceral pain. Pain 2023; 164:625-637. [PMID: 35994589 PMCID: PMC9916060 DOI: 10.1097/j.pain.0000000000002750] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 07/14/2022] [Accepted: 07/18/2022] [Indexed: 11/25/2022]
Abstract
ABSTRACT Irritable bowel syndrome is a functional gastrointestinal disorder characterized by chronic visceral pain with complex etiology and difficult treatment. Accumulated evidence has confirmed that the sensitization of the central nervous system plays an important role in the development of visceral pain, whereas the exact mechanisms of action of the neural pathways remain largely unknown. In this study, a distinct neural circuit was identified from the paraventricular hypothalamic (PVH) to the ventral of lateral septal (LSV) region. This circuit was responsible for regulating visceral pain. In particular, the data indicated that the PVH CaMKIIα-positive neurons inputs to the LSV CaMKIIα-positive neurons were only activated by colorectal distention rather than somatic stimulations. The PVH-LSV CaMKIIα + projection pathway was further confirmed by experiments containing a viral tracer. Optogenetic inhibition of PVH CaMKIIα + inputs to LSV CaMKIIα-positive neurons suppressed visceral pain, whereas selective activation of the PVH-LSV CaMKIIα + projection evoked visceral pain. These findings suggest the critical role of the PVH-LSV CaMKIIα + circuit in regulating visceral pain.
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Affiliation(s)
- Yong-Chang Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
| | - Qian Wang
- Department of Anesthesiology, Children's Hospital of Soochow University, Suzhou, China
| | - Meng-Ge Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
| | - Shu-Fen Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
| | - Guang-Yin Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
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Rasupillai Dharmaraj V, Sarkar A, Yi CH, Iputera K, Huang SY, Chung RJ, Hu SF, Liu RS. Battery Performance Amelioration by Introducing a Conducive Mixed Electrolyte in Rechargeable Mg-O 2 Batteries. ACS Appl Mater Interfaces 2023; 15:9675-9684. [PMID: 36780369 DOI: 10.1021/acsami.2c22757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
With magnesium being a cost-effective anode metal compared to the other conventional Li-based anodes in the energy market, it could be a capable source of energy storage. However, Mg-O2 batteries have struggled its way to overcome the poor cycling stability and sluggish reaction kinetics. Therefore, Ru metallic nanoparticles on carbon nanotubes (CNTs) were introduced as a cathode for Mg-O2 batteries, which are known for their inherent electronic properties, large surface area, and increased crystallinity to favor remarkable oxygen reduction reactions and oxygen evolution reactions (ORR and OER). Also, we deployed a first-of-its-kind, conducive mixed electrolyte (CME) (2 M Mg(NO3)2:1 M Mg(TFSI)2/diglyme). Hence, this synergistic incorporation of CME-based Ru/CNT Mg-O2 batteries could unleash long cycle life with low overpotential, excellent reversibility, and high ionic conductivity and also reduces the intrinsic corrosion behavior of Mg anodes. Correspondingly, this novel amalgamation of CME with Ru/CNT cathode has displayed superior cyclic stability of 65 cycles and a maximum discharge potential of 25 793 mAh g-1 with a small overvoltage plateau of 1.4 V, noticeably subjugating the findings of conventional single electrolyte (CSE) (1 M Mg(TFSI)2/diglyme). This CME-based Ru/CNT Mg-O2 battery design could have a significant outcome as a future battery technology.
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Affiliation(s)
- Vasantan Rasupillai Dharmaraj
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Ayan Sarkar
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Chia-Hui Yi
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Kevin Iputera
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shang-Yang Huang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Ren-Jei Chung
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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Liao YK, Tong Z, Liu SA, Huang JH, Liu RS, Hu SF. Spontaneous In Situ Formation of Lithium Metal Nitride in the Interface of Garnet-Type Solid-State Electrolyte by Tuning of Molten Lithium. ACS Appl Mater Interfaces 2023; 15:10283-10291. [PMID: 36757360 DOI: 10.1021/acsami.2c21618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
All-solid-state lithium-ion batteries (ASSLIBs) have attracted much attention owing to their high energy density and safety and are known as the most promising next-generation LIBs. The biggest advantage of ASSLIBs is that it can use lithium metal as the anode without any safety concerns. This study used a high-conductivity garnet-type solid electrolyte (Li6.75La3Zr1.75Ta0.25O12, LLZTO) and Li-Ga-N composite anode synthesized by mixing melted Li with GaN. The interfacial resistance was reduced from 589 to 21 Ω cm2, the symmetry cell was stably cycled for 1000 h at a current density of 0.1 mA cm-2 at room temperature, and the voltage range only changed from ±30 to ±40 mV. The full cell of Li-Ga-N|LLZTO|LFP exhibited a high first-cycle discharge capacity of 152.2 mAh g-1 and Coulombic efficiency of 96.5% and still maintained a discharge capacity retention of 91.2% after 100 cycles. This study also demonstrated that Li-Ga-N had been shown as two layers. Li3N shows more inclined to be closer to the LLZTO side. This method can help researchers understand what interface improvements can occur to enhance the performance of all-solid-state batteries in the future.
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Affiliation(s)
- Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shin-An Liu
- CPC Corporation, Taiwan, Kaohsiung 811, Taiwan
| | | | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
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Jena A, Pichaimuthu K, Leniec G, Kaczmarek SM, Chang H, Su C, Hu SF, Liu RS. Defect Mediated Improvements in the Photoelectrochemical Activity of MoS 2/SnS 2 Ultrathin Sheets on Si Photocathode for Hydrogen Evolution. ACS Appl Mater Interfaces 2022; 14:39896-39906. [PMID: 36018035 DOI: 10.1021/acsami.2c06797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Solar-driven water electrolysis to produce hydrogen is one of the clean energy options for the current energy-related challenges. Si as a photocathode exhibits a large overpotential due to the slow hydrogen evolution reaction (HER) kinetics and hence needs to be modified with a cocatalyst layer. MoS2 is a poor HER cocatalyst due to its inert basal plane. Activation of the MoS2 basal plane will facilitate HER kinetics. In this study, we have incorporated SnS2 into MoS2 ultrathin sheets to induce defect formation and phase transformation. MoS2/SnS2 composite ultrathin sheets with a Sn2+ state create a large number of S vacancies on the basal sites. The optimized defect-rich MoS2/SnS2 ultrathin sheets decorated on surface-modified Si micro pyramids as photocathodes show a current density of -23.8 mA/cm2 at 0 V with an onset potential of 0.23 V under acidic conditions, which is higher than that of the pristine MoS2. The incorporation of SnS2 into 2H-MoS2 ultrathin sheets not only induces a phase but also can alter the local atomic arrangement, which in turn is verified by their magnetic response. The diamagnetic SnS2 phase causes a decrease in symmetry and an increase in magnetic anisotropy of the Mo3+ ions.
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Affiliation(s)
- Anirudha Jena
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Karthika Pichaimuthu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Institute of Organic and Polymeric Materials, Research and Development Centre for Smart Textile, National Taipei University of Technology, Taipei 106, Taiwan
| | - Grzegorz Leniec
- Department of Technical Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, al. Piastów 48, 70-311 Szczecin, Poland
| | - Slawomir M Kaczmarek
- Department of Technical Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, al. Piastów 48, 70-311 Szczecin, Poland
| | - Ho Chang
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Chaochin Su
- Institute of Organic and Polymeric Materials, Research and Development Centre for Smart Textile, National Taipei University of Technology, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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Pichaimuthu K, Jena A, Chang H, Su C, Hu SF, Liu RS. Molybdenum Disulfide/Tin Disulfide Ultrathin Nanosheets as Cathodes for Sodium-Carbon Dioxide Batteries. ACS Appl Mater Interfaces 2022; 14:5834-5842. [PMID: 35060710 DOI: 10.1021/acsami.1c22435] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Metal-CO2 rechargeable batteries are of great importance due to their higher energy density and carbon capture capability. In particular, Na-CO2 batteries are potential energy-storage devices that can replace Li-based batteries due to their lower cost and abundance. However, because of the slow electrochemical processes owing to the carbonated discharge products, the cell shows a high overpotential. The charge overpotential of the Na-CO2 battery increases because of the cathode catalyst's inability to break down the insulating discharge product Na2CO3, thereby resulting in poor cycle performance. Herein, we develop an ultrathin nanosheet MoS2/SnS2 cathode composite catalyst for Na-CO2 battery application. Insertion of SnS2 reduces the overpotential and improves the cyclic stability compared to pristine MoS2. As shown by a cycle test with a restricted capacity of 500 mAh/g at 50 mA/g, the battery is stable up to 100 discharge-charge cycles as the prepared catalyst successfully decomposes Na2CO3. Furthermore, the battery with the MoS2/SnS2 cathode catalyst has a discharge capacity of 35 889 mAh/g. The reasons for improvements in the cycle performance and overpotential of the MoS2/SnS2 composite cathode catalyst are examined by a combination of Raman, X-ray photoelectron spectroscopy, and extended X-ray absorption fine structure analysis, which reveals an underneath phase transformation and changes in the local atomic environment to be responsible. SnS2 incorporation induces S-vacancies in the basal plane and 1T character in 2H MoS2. This combined impact of SnS2 incorporation results in undercoordinated Mo atoms. Such a change in the electronic structure and the phase of the MoS2/SnS2 composite cathode catalyst results in higher catalytic activity and reduces the cell overpotential.
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Affiliation(s)
- Karthika Pichaimuthu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Institute of Organic and Polymeric Materials, Research and Development Centre for Smart Textile, National Taipei University of Technology, Taipei 106, Taiwan
| | - Anirudha Jena
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Ho Chang
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Chaochin Su
- Institute of Organic and Polymeric Materials, Research and Development Centre for Smart Textile, National Taipei University of Technology, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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13
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Liao YK, Tong Z, Fang CC, Liao SC, Chen JM, Liu RS, Hu SF. Extensively Reducing Interfacial Resistance by the Ultrathin Pt Layer between the Garnet-Type Solid-State Electrolyte and Li-Metal Anode. ACS Appl Mater Interfaces 2021; 13:56181-56190. [PMID: 34784188 DOI: 10.1021/acsami.1c16922] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
All-solid-state Li-ion batteries (ASSLIBs), also known as next-generation batteries, have attracted much attention due to their high energy density and safety. The best advantage of ASSLIBs is the Li-metal anodes that could be used without safety issues. In this study, a highly conductive garnet solid electrolyte (Li6.75La3Zr1.75Ta0.25O12, LLZTO) was used in the ASSLIB, and a Pt film was used to modify the surface of LLZTO to prove the solution of the Li-metal anode for LLZTO. Li-Pt alloy was synthesized to improve the wettability and contact of the interface. The interfacial resistance was reduced by 21 times, at only 9 Ω cm2. The symmetric cell could stably cycle over 3500 h at a current density of 0.1 mA cm-2. The full cell of Li|Li-Pt|LLZTO|LiFePO4 and Li|Li-Pt|LLZTO|LiMn0.8Fe0.2PO4 achieved high stability in terms of battery performance. Point-to-point contact transformed into homogeneous surface contact made the Li-ion flux faster and more stable. This surface modification method could provide researchers with a new choice for fixing interface issues and promoting the application of high-performance ASSLIBs in the future.
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Affiliation(s)
- Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Chia-Chen Fang
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan
| | - Shih-Chieh Liao
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan
| | - Jin-Ming Chen
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
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14
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Savunthari KV, Chen CH, Chen YR, Tong Z, Iputera K, Wang FM, Hsu CC, Wei DH, Hu SF, Liu RS. Effective Ru/CNT Cathode for Rechargeable Solid-State Li-CO 2 Batteries. ACS Appl Mater Interfaces 2021; 13:44266-44273. [PMID: 34494812 DOI: 10.1021/acsami.1c11000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
An effective Ru/CNT electrocatalyst plays a crucial role in solid-state lithium-carbon dioxide batteries. In the present article, ruthenium metal decorated on a multi-walled carbon nanotubes (CNTs) is introduced as a cathode for the lithium-carbon dioxide batteries with Li1.5Al0.5Ge1.5(PO4)3 solid-state electrolyte. The Ru/CNT cathode exhibits a large surface area, maximum discharge capacity, excellent reversibility, and long cycle life with low overpotential. The electrocatalyst achieves improved electrocatalytic performance for the carbon dioxide reduction reaction and carbon dioxide evolution reaction, which are related to the available active sites. Using the Ru/CNT cathode, the solid-state lithium-carbon dioxide battery exhibits a maximum discharge capacity of 4541 mA h g-1 and 45 cycles of battery life with a small voltage gap of 1.24 V compared to the CNT cathode (maximum discharge capacity of 1828 mA h g-1, 25 cycles, and 1.64 V as voltage gap) at a current supply of 100 mA g-1 with a cutoff capacity of 500 mA h g-1. Solid-state lithium-carbon dioxide batteries have shown promising potential applications for future energy storage.
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Affiliation(s)
| | - Chien-Hung Chen
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - You-Ruei Chen
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Kevin Iputera
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Fu-Ming Wang
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320, Taiwan
- Sustainable Energy Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 320, Taiwan
| | - Chun-Chuan Hsu
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Da-Hua Wei
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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15
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Huang YJ, Kuo MC, Jaing TH, Liu HC, Yeh TC, Chen SH, Lin TL, Yang CP, Wang PN, Sheen JM, Chang TK, Chang CH, Hu SF, Huang TY, Wang SC, Wu KH, Chiou SS, Hsiao CC, Shih LY. Comparison of Two Quantitative PCR-Based Assays for Detection of Minimal Residual Disease in B-Precursor Acute Lymphoblastic Leukemia Harboring Three Major Fusion Transcripts. J Mol Diagn 2021; 23:1373-1379. [PMID: 34325057 DOI: 10.1016/j.jmoldx.2021.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/17/2021] [Accepted: 07/13/2021] [Indexed: 11/18/2022] Open
Abstract
Two quantitative PCR (qPCR)-based methods, for clonal Ig or T-cell receptor gene (Ig/TCR) rearrangements and for fusion transcripts, are widely used for the measurement of minimal residual disease (MRD) in patients with B-precursor acute lymphoblastic leukemia (ALL). MRD of bone marrow samples from 165 patients carrying the three major fusion transcripts, including 74 BCR-ABL1, 54 ETV6-RUNX1, and 37 TCF3-PBX1, was analyzed by using the two qPCR-based methods. The coefficient correlation of both methods was good for TCF3-PBX1 (R2 = 0.8088) and BCR-ABL1 (R2 = 0.8094) ALL and moderate for ETV6-RUNX1 (R2 = 0.5972). The concordance was perfect for TCF3-PBX1 ALL (97.2%), substantially concordant for ETV6-RUNX1 ALL (87.1%), and only moderate for BCR-ABL1 ALL (70.6%). The discordant MRD, positive for only one method with a difference greater than one log, was found in 4 of 93 samples (4.3%) with ETV6-RUNX1, 31 of 245 samples (12.7%) with BCR-ABL1, and 0 of TCF3-PBX1 ALL. None of the eight nontransplanted patients with BCR-ABL1-MRD (+)/Ig/TCR-MRD (-) with a median follow-up time of 73.5 months had hematologic relapses. Our study showed an excellent MRD concordance between the two qPCR-based methods in TCF3-PBX1 ALL, whereas qPCR for Ig/TCR is more reliable in BCR-ABL1 ALL.
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Affiliation(s)
- Ying-Jung Huang
- Division of Hematology-Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Ming-Chung Kuo
- Division of Hematology-Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Tang-Her Jaing
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Hematology-Oncology, Chang Gung Children's Hospital at Linkou, Taoyuan, Taiwan
| | - Hsi-Che Liu
- Department of Hematology-Oncology, Mackay Children's Hospital and Mackay Medical College, Taipei, Taiwan
| | - Ting-Chi Yeh
- Department of Hematology-Oncology, Mackay Children's Hospital and Mackay Medical College, Taipei, Taiwan
| | - Shih-Hsiang Chen
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Hematology-Oncology, Chang Gung Children's Hospital at Linkou, Taoyuan, Taiwan
| | - Tung-Liang Lin
- Division of Hematology-Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Chao-Ping Yang
- Department of Hematology-Oncology, Chang Gung Children's Hospital at Linkou, Taoyuan, Taiwan
| | - Po-Nan Wang
- Division of Hematology-Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Jiunn-Ming Sheen
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Pediatrics, Chang Gung Memorial Hospital at Kaohsiung, Kaohsiung, Taiwan; Department of Pediatrics, Chang Gung Memorial Hospital at Chiayi, Chiayi, Taiwan
| | - Te-Kau Chang
- Division of Pediatric Hematology and Oncology, China Medical University Children's Hospital, Taichung, Taiwan
| | - Chia-Hui Chang
- Division of Hematology-Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Shu-Fen Hu
- Division of Hematology-Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Ting-Yu Huang
- Division of Hematology-Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Shih-Chung Wang
- Division of Pediatric Hematology-Oncology, Changhua Christian Children's Hospital, Changhua, Taiwan
| | - Kang-Hsi Wu
- Department of Pediatrics, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Shyh-Shin Chiou
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Chih-Cheng Hsiao
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Pediatrics, Chang Gung Memorial Hospital at Kaohsiung, Kaohsiung, Taiwan
| | - Lee-Yung Shih
- Division of Hematology-Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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16
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Li X, Xu YC, Tian YQ, Zhang PA, Hu SF, Wang LH, Jiang XH, Xu GY. Downregulation of GRK6 in arcuate nucleus promotes chronic visceral hypersensitivity via NF-κB upregulation in adult rats with neonatal maternal deprivation. Mol Pain 2021; 16:1744806920930858. [PMID: 32484026 PMCID: PMC7268126 DOI: 10.1177/1744806920930858] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
AIMS The arcuate nucleus is a vital brain region for coursing of pain command. G protein-coupled kinase 6 (GRK6) accommodates signaling through G protein-coupled receptors. Studies have demonstrated that GRK6 is involved in inflammatory pain and neuropathic pain. The present study was designed to explore the role and the underlying mechanism of GRK6 in arcuate nucleus of chronic visceral pain. METHODS Chronic visceral pain of rats was induced by neonatal maternal deprivation and evaluated by monitoring the threshold of colorectal distension. Western blotting, immunofluorescence, real-time quantitative polymerase chain reaction techniques, and Nissl staining were employed to determine the expression and mutual effect of GRK6 with nuclear factor κB (NF-κB). RESULTS Expression of GRK6 in arcuate nucleus was significantly reduced in neonatal maternal deprivation rats when compared with control rats. GRK6 was mainly expressed in arcuate nucleus neurons, but not in astrocytes, and a little in microglial cells. Neonatal maternal deprivation reduced the percentage of GRK6-positive neurons of arcuate nucleus. Overexpression of GRK6 by Lentiviral injection into arcuate nucleus reversed chronic visceral pain in neonatal maternal deprivation rats. Furthermore, the expression of NF-κB in arcuate nucleus was markedly upregulated in neonatal maternal deprivation rats. NF-κB selective inhibitor pyrrolidine dithiocarbamate suppressed chronic visceral pain in neonatal maternal deprivation rats. GRK6 and NF-κB were expressed in the arcuate nucleus neurons. Importantly, overexpression of GRK6 reversed NF-κB expression at the protein level. In contrast, injection of pyrrolidine dithiocarbamate once daily for seven consecutive days did not alter GRK6 expression in arcuate nucleus of neonatal maternal deprivation rats. CONCLUSIONS Present data suggest that GRK6 might be a pivotal molecule participated in the central mechanisms of chronic visceral pain, which might be mediated by inhibiting NF-κB signal pathway. Overexpression of GRK6 possibly represents a potential strategy for therapy of chronic visceral pain.
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Affiliation(s)
- Xin Li
- Department of Physiology and Neurobiology, Medical College of Soochow University, Suzhou, P. R. China.,Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, P. R. China
| | - Yu-Cheng Xu
- Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, P. R. China
| | - Yuan-Qin Tian
- Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, P. R. China
| | - Ping-An Zhang
- Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, P. R. China
| | - Shu-Fen Hu
- Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, P. R. China
| | - Lin-Hui Wang
- Department of Physiology and Neurobiology, Medical College of Soochow University, Suzhou, P. R. China
| | - Xing-Hong Jiang
- Department of Physiology and Neurobiology, Medical College of Soochow University, Suzhou, P. R. China
| | - Guang-Yin Xu
- Department of Physiology and Neurobiology, Medical College of Soochow University, Suzhou, P. R. China.,Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, P. R. China
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17
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Thoka S, Tsai CM, Tong Z, Jena A, Wang FM, Hsu CC, Chang H, Hu SF, Liu RS. Comparative Study of Li-CO 2 and Na-CO 2 Batteries with Ru@CNT as a Cathode Catalyst. ACS Appl Mater Interfaces 2021; 13:480-490. [PMID: 33375777 DOI: 10.1021/acsami.0c17373] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Alkali metal-carbon dioxide (Li/Na-CO2) batteries have generated widespread interest in the past few years owing to the attractive strategy of utilizing CO2 while still delivering high specific energy densities. Among these systems, Na-CO2 batteries are more cost effective than Li-CO2 batteries because the former uses cheaper and abundant Na. Herein, a Ru/carbon nanotube (CNT) as a cathode material was used to compare the mechanisms, stabilities, overpotentials, and energy densities of Li-CO2 and Na-CO2 batteries. The potential of Na-CO2 batteries as a viable energy storage technology was demonstrated.
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Affiliation(s)
| | - Chun-Ming Tsai
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Anirudha Jena
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Fu-Ming Wang
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
- Sustainable Energy Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
- Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
- R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 32023, Taiwan
| | - Chun-Chuan Hsu
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Ho Chang
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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18
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Chen CJ, Yeh CY, Chen CH, Jena A, Wei DH, Chang H, Hu SF, Liu RS. Molybdenum Tungsten Disulfide with a Large Number of Sulfur Vacancies and Electronic Unoccupied States on Silicon Micropillars for Solar Hydrogen Evolution. ACS Appl Mater Interfaces 2020; 12:54671-54682. [PMID: 33242954 DOI: 10.1021/acsami.0c15905] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hydrogen energy is a promising alternative for fossil fuels because of its high energy density and carbon-free emission. Si is an ideal light absorber used in solar water splitting to produce H2 gas because of its small band gap, appropriate conduction band position, and high theoretical photocurrent. However, the overpotential required to drive the photoelectrochemical (PEC) hydrogen evolution reaction (HER) on bare Si electrodes is severely high owing to its sluggish kinetics. Herein, a molybdenum tungsten disulfide (MoS2-WS2) composite decorated on a Si photoabsorber is used as a cocatalyst to accelerate HER kinetics and enhance PEC performance. This MoS2-WS2 hybrid showed superior catalytic activity compared with pristine MoS2 or WS2. The optimal MoS2-WS2/Si electrode delivered a photocurrent of -25.9 mA/cm2 at 0 V (vs reversible hydrogen electrode). X-ray absorption spectroscopy demonstrated that MoS2-WS2 possessed a high hole concentration of unoccupied electronic states in the MoS2 component, which could promote to accept large amounts of carriers from the Si photoabsorber. Moreover, a large number of sulfur vacancies are generated in the MoS2 constituent of this hybrid cocatalyst. These sulfur defects served as HER active sites to boost the catalytic efficiency. Besides, the TiO2-protective MoS2-WS2/Si photocathode maintained a current density of -15.0 mA/cm2 after 16 h of the photocatalytic stability measurement.
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Affiliation(s)
- Chih-Jung Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Chia-Yu Yeh
- Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Chia-Hsien Chen
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Anirudha Jena
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Da-Hua Wei
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Ho Chang
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
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19
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Tong Z, Wang SB, Liao YK, Hu SF, Liu RS. Interface Between Solid-State Electrolytes and Li-Metal Anodes: Issues, Materials, and Processing Routes. ACS Appl Mater Interfaces 2020; 12:47181-47196. [PMID: 33030017 DOI: 10.1021/acsami.0c13591] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Li metal, which has a high theoretical capacity and negative electrochemical potential, is regarded as the "holy grail" in Li-ion batteries. However, the flammable nature of liquid electrolyte leads to safety issues. Hence, the cooperation of solid-state electrolyte and Li-metal anode is demanded. However, the short cycle life induced by interfacial issues is the main challenge faced by their cooperation. In this review, dendrite and interfacial side reactions are comprehensively analyzed as the main interfacial problems. Meanwhile, the "state-of-the-art" interphase materials are summarized. The challenges faced by each kind of material are underscored. Moreover, different processing routes to fabricate artificial interphase are also investigated from an engineering perspective. The processing routes suitable for mass production are also underscored.
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Affiliation(s)
- Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Bo Wang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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20
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Tong Z, Wang SB, Jena A, Liu CE, Liao SC, Chen JM, Chang H, Hu SF, Guo X, Liu RS. Matchmaker of Marriage between a Li Metal Anode and NASICON-Structured Solid-State Electrolyte: Plastic Crystal Electrolyte and Three-Dimensional Host Structure. ACS Appl Mater Interfaces 2020; 12:44754-44761. [PMID: 32917086 DOI: 10.1021/acsami.0c12962] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The marriage between a Li metal anode and the solid-state electrolyte is expected to limit the safety risk of secondary batteries. However, dendrites and interfacial stability hinder the combination of Li metal anode and solid-state electrolyte. Herein, a plastic crystal electrolyte (PCE) and three-dimensional (3D) host structure played the role of a matchmaker in combining the solid-state electrolyte and Li metal anode. Succinonitrile cooperated with Li salt and Li6.4La3Zr1.4Ta0.6O12 nanosize powder and built a PCE interphase, which enhanced the interfacial stability between Li1.5Al0.5Ge1.5(PO4)3 and Li metal anode. To protect the soft PCE from the dendrite penetration, commercially sold Super P, carbon nanotube, KS6, and Ketjen black were co-heated with the melted Li metal. However, only KS6 built a 3D host in Li metal successfully because of its high graphitization and layered structure. Benefitting from the matchmakers, the solid-state batteries exhibited enhanced cycling stability.
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Affiliation(s)
- Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Bo Wang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Anirudha Jena
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Chia-Erh Liu
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan
| | - Shih-Chieh Liao
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan
| | - Jin-Ming Chen
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan
| | - Ho Chang
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Xiangxin Guo
- College of Physics, Qingdao University, Qingdao 266071, China
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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21
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Guzman GNAD, Rajendran V, Bao Z, Fang MH, Pang WK, Mahlik S, Lesniewski T, Grinberg M, Molokeev MS, Leniec G, Kaczmarek SM, Ueda J, Lu KM, Hu SF, Chang H, Liu RS. Multi-Site Cation Control of Ultra-Broadband Near-Infrared Phosphors for Application in Light-Emitting Diodes. Inorg Chem 2020; 59:15101-15110. [PMID: 32998510 DOI: 10.1021/acs.inorgchem.0c02055] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Near-infrared (NIR) phosphors are fascinating materials that have numerous applications in diverse fields. In this study, a series of La3Ga5GeO14:Cr3+ phosphors, which was incorporated with Sn4+, Ba2+, and Sc3+, was successfully synthesized using solid-state reaction to explore every cationic site comprehensively. The crystal structures were well resolved by combining synchrotron X-ray diffraction and neutron powder diffraction through joint Rietveld refinements. The trapping of free electrons induced by charge unbalances and lattice vacancies changes the magnetic properties, which was well explained by a Dyson curve in electron paramagnetic resonance. Temperature and pressure-dependent photoluminescence spectra reveal various luminescent properties between strong and weak fields in different dopant centers. The phosphor-converted NIR light-emitting diode (pc-NIR LED) package demonstrates a superior broadband emission that covers the near-infrared (NIR) region of 650-1050 nm. This study can provide researchers with new insight into the control mechanism of multiple-cation-site phosphors and reveal a potential phosphor candidate for practical NIR LED application.
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Affiliation(s)
| | - Veeramani Rajendran
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Zhen Bao
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Mu-Huai Fang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Wei-Kong Pang
- Institute for Superconducting & Electronic Materials, Faculty of Engineering, University of Wollongong, Wollongong 2522, Australia
| | - Sebastian Mahlik
- Institute of Experimental Physics, Faculty of Mathematic, Physics and Informatics, University of Gdańsk, Wita Stwosza 57, 80-308 Gdańsk, Poland
| | - Tadeusz Lesniewski
- Institute of Experimental Physics, Faculty of Mathematic, Physics and Informatics, University of Gdańsk, Wita Stwosza 57, 80-308 Gdańsk, Poland
| | - Marek Grinberg
- Institute of Experimental Physics, Faculty of Mathematic, Physics and Informatics, University of Gdańsk, Wita Stwosza 57, 80-308 Gdańsk, Poland
| | - Maxim S Molokeev
- Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia.,Siberian Federal University, Krasnoyarsk 60041, Russia.,Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
| | - Grzegorz Leniec
- Institute of Physics, Department of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology, Szczecin, al. Piastow 48, 70-311 Szczecin, Poland
| | - Slawomir M Kaczmarek
- Institute of Physics, Department of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology, Szczecin, al. Piastow 48, 70-311 Szczecin, Poland
| | - Jumpei Ueda
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
| | - Kuang-Mao Lu
- Everlight Electronics Co., Ltd., New Taipei City 238, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ho Chang
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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22
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Leaño JL, Mariano COM, Huang WT, Mahlik S, Lesniewski T, Grinberg M, Sheu HS, Hu SF, Liu RS. Thermally Stable and Deep Red Luminescence of Sr 1-xBa x[Mg 2Al 2N 4]:Eu 2+ ( x = 0-1) Phosphors for Solid State and Agricultural Lighting Applications. ACS Appl Mater Interfaces 2020; 12:23165-23171. [PMID: 32338495 DOI: 10.1021/acsami.0c07345] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The systematic substitution of Ba in the Sr site of Sr[Mg2Al2N4]:Eu2+ generates a deep-red-emitting phosphor with enhanced thermal luminescence properties. Gas pressure sintering (GPS) of all-nitride starting materials in Molybdenum (Mo) crucibles yields pure-phase red-orange-colored phosphors. Peaks in the synchrotron X-ray diffraction (SXRD) data show a systematic shift toward smaller angles due to the introduction of the larger Ba cation in the same crystal structure. The photoluminescence property reveals that Ba substitution shifts the original emission wavelength of Sr[Mg2Al2N4]:Eu2+ (625 nm) toward ∼690 nm for Ba[Mg2Al2N4]:Eu2+. Thermal stability measurement of Sr1-xBax[Mg2Al2N4] indicates a systematic increase in stability from x = 0 to x = 1. X-ray absorption near-edge spectroscopy (XANES) results demonstrate the coexistence of Eu2+ and Eu3+. The red-shift and the enhanced thermal stability reveals that the distance of the emitting 5d level to the conduction band of Ba[Mg2Al2N4]:Eu2+ is large. The ionic size mismatch of Eu occupying a Ba site reduces the symmetry, thereby further splitting the degenerate emitting 5d level and lowering the energy of the emitting center. The development of deep-red phosphors emitting at 670-690 nm (x = 0.8-1.0) offers possible candidates for plant lighting applications.
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Affiliation(s)
- Julius L Leaño
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
- Nanoscience and Technology Program, Taiwan International Graduate Program, Academia Sinica and National Taiwan University, Taipei 10617, Taiwan
- Philippine Textile Research Institute, Department of Science and Technology, Taguig City 1631, Philippines
| | - Carl Osby M Mariano
- Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Wen-Tse Huang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Sebastian Mahlik
- Institute of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Gdańsk University, Wita Stwosza 57, 80-308 Gdańsk, Poland
| | - Tadeusz Lesniewski
- Institute of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Gdańsk University, Wita Stwosza 57, 80-308 Gdańsk, Poland
| | - Marek Grinberg
- Institute of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Gdańsk University, Wita Stwosza 57, 80-308 Gdańsk, Poland
| | - Hwo-Shuenn Sheu
- National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, Taiwan
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Chen CJ, Yang JJ, Chen CH, Wei DH, Hu SF, Liu RS. Improvement of lithium anode deterioration for ameliorating cyclabilities of non-aqueous Li-CO 2 batteries. Nanoscale 2020; 12:8385-8396. [PMID: 32239028 DOI: 10.1039/d0nr00971g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Herein, ruthenium (Ru) nanoparticles were anchored on carbon nanotubes (Ru/CNTs) functionalized as catalyst cathodes for non-aqueous Li-CO2 cells. For cycling tests through a low cut-off capacity (100 mA h g-1), the origin of battery deterioration resulted from the accumulation of Li2CO3 discharging products on catalytic surfaces, identical to the observations in previous studies. However, the Li-CO2 cells in this work showed a sudden death within several cycles of high cut-off capacity (500 mA h g-1), and no Li2CO3 residues were investigated on the cathode. In contrast, Li dendrites and passivation materials (LiOH and Li2CO3) were generated on Li anodes upon cycling at a limited capacity of 500 mA h g-1, which dominantly contributed to the battery degradation. A Li foil-replacement method was adopted to make the Ru/CNT cathode perform continuous 100 cycles under a cut-off capacity of 500 mA h g-1. These results indicate that not only Li2CO3 residues blocked on the active sites of the cathode but also Li dendrites and passivation materials produced on the anode caused Li-CO2 battery deterioration. Moreover, in the present work, a carbon thin film was deposited on Li metal (C/Li) by a sputtering system for suppressing the dendrite formation upon cycling and promoting the defense of the H2O attack from the electrolyte disintegration. The Li-CO2 cell with a Ru/CNT catalyst and a C/Li anode revealed an improved electrochemical stability of 115 cycles at a limited capacity of 500 mA h g-1. This proto strategy provided a significant research direction focusing on Li anodes for elevating the Li-CO2 battery durability.
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Affiliation(s)
- Chih-Jung Chen
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan.
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24
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Thoka S, Chen CJ, Jena A, Wang FM, Wang XC, Chang H, Hu SF, Liu RS. Spinel Zinc Cobalt Oxide (ZnCo 2O 4) Porous Nanorods as a Cathode Material for Highly Durable Li-CO 2 Batteries. ACS Appl Mater Interfaces 2020; 12:17353-17363. [PMID: 32202752 DOI: 10.1021/acsami.9b21347] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Li-CO2 batteries are of great interest among researchers due to their high energy density and utilization of the greenhouse gas CO2 to produce energy. However, several shortcomings have been encountered in the practical applications of Li-CO2 batteries, among which their poor cyclability and high charge overpotential necessary to decompose the highly insulating discharge product (Li2CO3) are the most important. Herein, the spinel zinc cobalt oxide porous nanorods with carbon nanotubes (ZnCo2O4@CNTs) composite is employed as a cathode material in Li-CO2 batteries to improve the latter's cycling performance. The ZnCo2O4@CNT cathode-based Li-CO2 battery exhibited a full discharge capacity of 4275 mAh g-1 and excellent cycling performance over 200 cycles with a charge overpotential below 4.3 V when operated at a current density of 100 mA g-1 and fixed capacity of 500 mAh g-1. The superior performance of the ZnCo2O4@CNT cathode composite was attributed to the synergistic effects of ZnCo2O4 and CNT. The highly porous ZnCo2O4 nanorod structures in the ZnCo2O4@CNT catalyst showed enhanced catalytic activity/stability, which effectively promoted CO2 diffusion during the discharging process and accelerated Li2CO3 decomposition at a low charge overpotential.
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Affiliation(s)
| | - Chih-Jung Chen
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Anirudha Jena
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Fu-Ming Wang
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
- Sustainable Energy Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
- Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
- R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 32023, Taiwan
| | - Xing-Chun Wang
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Ho Chang
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
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25
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Han CP, Chen CJ, Hsu CC, Jena A, Chang H, Yeh NC, Hu SF, Liu RS. Pressure-controlled chemical vapor deposition of graphene as catalyst for solar hydrogen evolution reaction. Catal Today 2019. [DOI: 10.1016/j.cattod.2019.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Han CP, Veeramani V, Hsu CC, Jena A, Chang H, Yeh NC, Hu SF, Liu RS. Vertically-aligned graphene nanowalls grown via plasma-enhanced chemical vapor deposition as a binder-free cathode in Li-O 2 batteries. Nanotechnology 2018; 29:505401. [PMID: 30240363 DOI: 10.1088/1361-6528/aae362] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present report, vertically-aligned graphene nanowalls are grown on Ni foam (VA-G/NF) using plasma-enhanced chemical vapor deposition method at room temperature. Optimization of the growth conditions provides graphene sheets with controlled defect sites. The unique architecture of the vertically-aligned graphene sheets allows sufficient space for the ionic movement within the sheets and hence enhancing the catalytic activity. Further modification with ruthenium nanoparticles (Ru NPs) drop-casted on VA-G/NF improves the charge overpotential for lithium-oxygen (Li-O2) battery cycles. Such reduction we believe is due to the easier passage of ions between the perpendicularly standing graphene sheets thereby providing ionic channels.
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Affiliation(s)
- Chih-Pin Han
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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27
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Chen CJ, Liu CW, Yang KC, Yin LC, Wei DH, Hu SF, Liu RS. Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction. ACS Appl Mater Interfaces 2018; 10:37142-37149. [PMID: 30296046 DOI: 10.1021/acsami.8b14571] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cobalt sulfide (CoS x) functioned as a co-catalyst to accelerate the kinetics of photogenerated electrons on Si photocathode, leading to the enhancement of solar hydrogen evolution efficiency. By doping phosphorus heteroatoms, CoS x materials showed an improved catalytic activity because of superior surface area and quantity of active sites. Furthermore, increased vacancies in unoccupied electronic states were observed, as more phosphorus atoms doped into CoS x co-catalysts. Although these vacant sites improved the capability to accept photoinduced electrons from Si photoabsorber, chemisorption energy of atomic hydrogen on catalysts was the dominant factor affecting in photoelectrochemical performance. We suggested that P-doped CoS x with appropriate doping quantities showed thermoneutral hydrogen adsorption. Excess phosphorus dopants in CoS x contributed to excessively strong adsorption with H atoms, causing the poor consecutive desorption ability of photocatalytic reaction. The optimal P-doped CoS x-decorated Si photocathode showed a photocurrent of -20.6 mA cm-2 at 0 V. Moreover, a TiO2 thin film was deposited on the Si photocathode as a passivation layer for improving the durability. The current density of 10 nm TiO2-modified photocathode remained at approximately -13.3 mA cm-2 after 1 h of chronoamperometry.
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Affiliation(s)
- Chih-Jung Chen
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Chi-Wei Liu
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology , National Taipei University of Technology , Taipei 10608 , Taiwan
| | - Kai-Chih Yang
- Department of Physics , National Taiwan Normal University , Taipei 11677 , Taiwan
| | - Li-Chang Yin
- Shenyang National Laboratory for Materials Science, Institute of Metal Research , Chinese Academy of Sciences , Shenyang 110016 , China
| | - Da-Hua Wei
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology , National Taipei University of Technology , Taipei 10608 , Taiwan
| | - Shu-Fen Hu
- Department of Physics , National Taiwan Normal University , Taipei 11677 , Taiwan
| | - Ru-Shi Liu
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology , National Taipei University of Technology , Taipei 10608 , Taiwan
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28
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Veeramani V, Yu HC, Hu SF, Liu RS. Highly Efficient Photoelectrochemical Hydrogen Generation Reaction Using Tungsten Phosphosulfide Nanosheets. ACS Appl Mater Interfaces 2018; 10:17280-17286. [PMID: 29727156 DOI: 10.1021/acsami.8b03692] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The initiation of hydrogen energy production from sunlight through photoelectrochemical (PEC) system is an important strategy for resolving contemporary issues in energy requirement. Although precious Pt and other noble metals offer a desirable catalytic activity for this method, earth-abundant nonprecious metal catalysts must be developed for wide-scale application. In this regard, P-type silicon (P-Si) micropyramids (Si MPs) are a favorable photocathode because of their effective light-conversion properties and appropriate band gap position. In this study, we developed amorphous tungsten phosphosulfide nanosheets (WS2- xP x NSs) on Si MPs through a simple thermal annealing process for solar-driven hydrogen evolution reaction. The P substitution in the nanostructure effectively produced many defective sites at the edges. The product exhibited an efficient photocurrent density of 19.11 mA cm-2 at 0 V and a low onset potential of 0.21 VRHE compared with tungsten disulfide (WS2; 13.43 mA cm-2). The fabricated catalyst also showed desirable stability for up to 8 h for the WS0.60P1.40@Si MPs photocathode. The extraordinary activity could be due to numerous active sites provided by heteroatoms (sulfur and phosphorus) in the edges, resulting in dwindling reaction kinetics barrier and enhanced PEC activity.
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Affiliation(s)
| | - Hsin-Chin Yu
- Department of Physics , National Taiwan Normal University , Taipei 116 , Taiwan
| | - Shu-Fen Hu
- Department of Physics , National Taiwan Normal University , Taipei 116 , Taiwan
| | - Ru-Shi Liu
- Department of Chemistry , National Taiwan University , Taipei 106 , Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology , National Taipei University of Technology , Taipei 106 , Taiwan
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29
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Chen CJ, Mori T, Jena A, Lin HY, Yang NH, Wu NL, Chang H, Hu SF, Liu RS. Optimizing the Lithium Phosphorus Oxynitride Protective Layer Thickness on Low-Grade Composite Si-Based Anodes for Lithium-Ion Batteries. ChemistrySelect 2018. [DOI: 10.1002/slct.201702641] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chih-Jung Chen
- Department of Chemistry; National Taiwan University; Taipei 106 Taiwan
| | - Tatsuhiro Mori
- Department of Chemistry; National Taiwan University; Taipei 106 Taiwan
| | - Anirudha Jena
- Department of Chemistry; National Taiwan University; Taipei 106 Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology; National Taipei University of Technology; Taipei 106 Taiwan
| | - Hung-Yu Lin
- Department of Chemical Engineering; National Taiwan University; Taipei 106 Taiwan
| | - Nai-Hsuan Yang
- Department of Chemistry; National Taiwan University; Taipei 106 Taiwan
| | - Nae-Lih Wu
- Department of Chemical Engineering; National Taiwan University; Taipei 106 Taiwan
| | - Ho Chang
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology; National Taipei University of Technology; Taipei 106 Taiwan
| | - Shu-Fen Hu
- Department of Physics; National Taiwan Normal University; Taipei 116 Taiwan
| | - Ru-Shi Liu
- Department of Chemistry; National Taiwan University; Taipei 106 Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology; National Taipei University of Technology; Taipei 106 Taiwan
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30
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Bazri B, Lin YC, Lu TH, Chen CJ, Kowsari E, Hu SF, Liu RS. A heteroelectrode structure for solar water splitting: integrated cobalt ditelluride across a TiO2-passivated silicon microwire array. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02688e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CoTe2@TiO2-Si-MWs provide active sites for proton reduction and combine surface hydrogen atoms into molecular hydrogen.
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Affiliation(s)
- Behrouz Bazri
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
- Department of Chemistry
| | - Yu-Chen Lin
- Department of Physics
- National Taiwan Normal University
- Taipei
- 116 Taiwan
| | - Tzu-Hsiang Lu
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
| | - Chih-Jung Chen
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
| | - Elaheh Kowsari
- Department of Chemistry
- Amirkabir University of Technology
- Tehran 1591634311
- Iran
| | - Shu-Fen Hu
- Department of Physics
- National Taiwan Normal University
- Taipei
- 116 Taiwan
| | - Ru-Shi Liu
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
- Department of Mechanical Engineering and Graduate
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31
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Basu M, Zhang ZW, Chen CJ, Lu TH, Hu SF, Liu RS. CoSe 2 Embedded in C 3N 4: An Efficient Photocathode for Photoelectrochemical Water Splitting. ACS Appl Mater Interfaces 2016; 8:26690-26696. [PMID: 27635665 DOI: 10.1021/acsami.6b06520] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An efficient H2 evolution catalyst is developed by grafting CoSe2 nanorods into C3N4 nanosheets. The as-obtained C3N4-CoSe2 heterostructure can show excellent performance in H2 evolution with outstanding durability. To generate phatocathode for photoelectrochemical water splitting CoSe2 grafted in C3N4 was decorated on the top of p-Si microwires (MWs). p-Si/C3N4-CoSe2 heterostructure can work as an efficient photocathode material for solar H2 production in PEC water splitting. In 0.5 M H2SO4, p-Si/C3N4-CoSe2 can afford photocurrent density -4.89 mA/cm2 at "0" V vs RHE and it can efficiently work for 3.5 h under visible light. Superior activity of C3N4-CoSe2 compared to CoSe2 toward H2 evolution is explained with the help of impedance spectroscopy.
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Affiliation(s)
- Mrinmoyee Basu
- Department of Chemistry, National Taiwan University , Taipei 106, Taiwan
| | - Zhi-Wei Zhang
- Department of Physics, National Taiwan Normal University , Taipei 116, Taiwan
| | - Chih-Jung Chen
- Department of Chemistry, National Taiwan University , Taipei 106, Taiwan
| | - Tzu-Hsiang Lu
- Department of Chemistry, National Taiwan University , Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University , Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University , Taipei 106, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology , Taipei 106, Taiwan
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32
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Chen CJ, Yang KC, Basu M, Lu TH, Lu YR, Dong CL, Hu SF, Liu RS. Wide Range pH-Tolerable Silicon@Pyrite Cobalt Dichalcogenide Microwire Array Photoelectrodes for Solar Hydrogen Evolution. ACS Appl Mater Interfaces 2016; 8:5400-5407. [PMID: 26859427 DOI: 10.1021/acsami.6b00027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study employed silicon@cobalt dichalcogenide microwires (MWs) as wide range pH-tolerable photocathode material for solar water splitting. Silicon microwire arrays were fabricated through lithography and dry etching technologies. Si@Co(OH)2 MWs were utilized as precursors to synthesize Si@CoX2 (X = S or Se) photocathodes. Si@CoS2 and Si@CoSe2 MWs were subsequently prepared by thermal sulfidation and hydrothermal selenization reaction of Si@Co(OH)2, respectively. The CoX2 outer shell served as cocatalyst to accelerate the kinetics of photogenerated electrons from the underlying Si MWs and reduce the recombination. Moreover, the CoX2 layer completely deposited on the Si surface functioned as a passivation layer by decreasing the oxide formation on Si MWs during solar hydrogen evolution. Si@CoS2 photocathode showed a photocurrent density of -3.22 mA cm(-2) at 0 V (vs RHE) in 0.5 M sulfuric acid electrolyte, and Si@CoSe2 MWs revealed moderate photocurrent density of -2.55 mA cm(-2). However, Si@CoSe2 presented high charge transfer efficiency in neutral and alkaline electrolytes. Continuous chronoamperometry in acid, neutral, and alkaline solutions was conducted at 0 V (vs RHE) to evaluate the photoelectrochemical durability of Si@CoX2 MWs. Si@CoS2 electrode showed no photoresponse after the chronoamperometry test because it was etched through the electrolyte. By contrast, the photocurrent density of Si@CoSe2 MWs gradually increased to -5 mA cm(-2) after chronoamperometry characterization owing to the amorphous structure generation.
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Affiliation(s)
- Chih-Jung Chen
- Department of Chemistry, National Taiwan University , Taipei 10617, Taiwan
| | - Kai-Chih Yang
- Department of Physics, National Taiwan Normal University , Taipei 11677, Taiwan
| | - Mrinmoyee Basu
- Department of Chemistry, National Taiwan University , Taipei 10617, Taiwan
| | - Tzu-Hsiang Lu
- Department of Chemistry, National Taiwan University , Taipei 10617, Taiwan
| | - Ying-Rui Lu
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
- Program for Science and Technology of Accelerator Light Source, National Chiao Tung University , Hsinchu 30010, Taiwan
| | - Chung-Li Dong
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
- Department of Physics, Tamkang University , Tamsui 25137, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University , Taipei 11677, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University , Taipei 10617, Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology , Taipei 10608, Taiwan
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Chen CJ, Chen CK, Lu TH, Hu SF, Liu RS. The substitution of the platinum counter electrode in a plasmonic photoelectrochemical system with near-infrared absorption for solar water splitting. RSC Adv 2016. [DOI: 10.1039/c6ra24563c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A plasmonic photoelectrochemical system was constructed by alternating the conventional Pt electrode for utilizing a wide range of the solar spectrum.
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Affiliation(s)
- Chih-Jung Chen
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
| | - Chih Kai Chen
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
| | - Tzu-Hsiang Lu
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
| | - Shu-Fen Hu
- Department of Physics
- National Taiwan Normal University
- Taipei 116
- Taiwan
| | - Ru-Shi Liu
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
- Department of Mechanical Engineering
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34
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Basu M, Zhang ZW, Chen CJ, Chen PT, Yang KC, Ma CG, Lin CC, Hu SF, Liu RS. Inside Back Cover: Heterostructure of Si and CoSe 2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution (Angew. Chem. Int. Ed. 21/2015). Angew Chem Int Ed Engl 2015. [DOI: 10.1002/anie.201503452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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35
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Basu M, Zhang ZW, Chen CJ, Chen PT, Yang KC, Ma CG, Lin CC, Hu SF, Liu RS. Innenrücktitelbild: Heterostructure of Si and CoSe 2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution (Angew. Chem. 21/2015). Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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36
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Mori T, Chen CJ, Hung TF, Mohamed SG, Lin YQ, Lin HZ, Sung JC, Hu SF, Liu RS. High specific capacity retention of graphene/silicon nanosized sandwich structure fabricated by continuous electron beam evaporation as anode for lithium-ion batteries. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.02.219] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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Basu M, Zhang ZW, Chen CJ, Chen PT, Yang KC, Ma CG, Lin CC, Hu SF, Liu RS. Heterostructure of Si and CoSe2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502573] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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38
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Basu M, Zhang ZW, Chen CJ, Chen PT, Yang KC, Ma CG, Lin CC, Hu SF, Liu RS. Heterostructure of Si and CoSe2: A Promising Photocathode Based on a Non-noble Metal Catalyst for Photoelectrochemical Hydrogen Evolution. Angew Chem Int Ed Engl 2015; 54:6211-6. [DOI: 10.1002/anie.201502573] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Indexed: 11/06/2022]
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39
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Chen CJ, Chen MG, Chen CK, Wu PC, Chen PT, Basu M, Hu SF, Tsai DP, Liu RS. Ag–Si artificial microflowers for plasmon-enhanced solar water splitting. Chem Commun (Camb) 2015; 51:549-52. [DOI: 10.1039/c4cc07935c] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The solar water splitting efficiency of Ag–Si microflowers was enhanced through the synergistic effects of co-catalytic and plasmonic assistance.
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Affiliation(s)
- Chih-Jung Chen
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
| | - Ming-Guei Chen
- Department of Physics
- National Taiwan Normal University
- Taipei 116
- Taiwan
| | - Chih Kai Chen
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
| | - Pin Chieh Wu
- Department of Physics
- National Taiwan University
- Taipei 106
- Taiwan
- Research Center for Applied Sciences
| | - Po-Tzu Chen
- Department of Physics
- National Taiwan Normal University
- Taipei 116
- Taiwan
| | - Mrinmoyee Basu
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
| | - Shu-Fen Hu
- Department of Physics
- National Taiwan Normal University
- Taipei 116
- Taiwan
| | - Din Ping Tsai
- Department of Physics
- National Taiwan University
- Taipei 106
- Taiwan
- Research Center for Applied Sciences
| | - Ru-Shi Liu
- Department of Chemistry
- National Taiwan University
- Taipei 106
- Taiwan
- Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology
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Mohamed SG, Chen CJ, Chen CK, Hu SF, Liu RS. High-performance lithium-ion battery and symmetric supercapacitors based on FeCo₂O₄ nanoflakes electrodes. ACS Appl Mater Interfaces 2014; 6:22701-22708. [PMID: 25437918 DOI: 10.1021/am5068244] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A successive preparation of FeCo2O4 nanoflakes arrays on nickel foam substrates is achieved by a simple hydrothermal synthesis method. After 170 cycles, a high capacity of 905 mAh g(-1) at 200 mA g(-1) current density and very good rate capabilities are obtained for lithium-ion battery because of the 2D porous structures of the nanoflakes arrays. The distinctive structural features provide the battery with excellent electrochemical performance. The symmetric supercapacitor on nonaqueous electrolyte demonstrates high specific capacitance of 433 F g(-1) at 0.1 A g(-1) and 16.7 F g(-1) at high scan rate of 5 V s(-1) and excellent cyclic performance of 2500 cycles of charge-discharge cycling at 2 A g(-1) current density, revealing excellent long-term cyclability of the electrode even under rapid charge-discharge conditions.
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Affiliation(s)
- Saad Gomaa Mohamed
- Department of Chemistry, National Taiwan University , Taipei 106, Taiwan
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Mohamed SG, Hung TF, Chen CJ, Chen CK, Hu SF, Liu RS. Efficient energy storage capabilities promoted by hierarchical MnCo2O4 nanowire-based architectures. RSC Adv 2014. [DOI: 10.1039/c4ra01677g] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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42
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Huang WY, Yoshimura F, Ueda K, Shimomura Y, Sheu HS, Chan TS, Greer HF, Zhou W, Hu SF, Liu RS, Attfield JP. Nanosegregation and Neighbor-Cation Control of Photoluminescence in Carbidonitridosilicate Phosphors. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302494] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Huang WY, Yoshimura F, Ueda K, Shimomura Y, Sheu HS, Chan TS, Greer HF, Zhou W, Hu SF, Liu RS, Attfield JP. Nanosegregation and Neighbor-Cation Control of Photoluminescence in Carbidonitridosilicate Phosphors. Angew Chem Int Ed Engl 2013; 52:8102-6. [DOI: 10.1002/anie.201302494] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/17/2013] [Indexed: 11/07/2022]
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45
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Mohamed SG, Hung TF, Chen CJ, Chen CK, Hu SF, Liu RS, Wang KC, Xing XK, Liu HM, Liu AS, Hsieh MH, Lee BJ. Flower-like ZnCo2O4 nanowires: toward a high-performance anode material for Li-ion batteries. RSC Adv 2013. [DOI: 10.1039/c3ra42625d] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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46
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Hung TF, Wong HC, Tu YC, Shen CC, Liu RS, Chen JM, Hu SF. X-ray Absorption Spectroscopy Approaches to Electronic State and Coordination Type of Lithium Phosphorus Oxynitride Thin Films. J CHIN CHEM SOC-TAIP 2012. [DOI: 10.1002/jccs.201200141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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47
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Yeh CW, Chen WT, Liu RS, Hu SF, Sheu HS, Chen JM, Hintzen HT. Origin of thermal degradation of Sr(2-x)Si5N8:Eu(x) phosphors in air for light-emitting diodes. J Am Chem Soc 2012; 134:14108-17. [PMID: 22831180 DOI: 10.1021/ja304754b] [Citation(s) in RCA: 260] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The orange-red emitting phosphors based on M(2)Si(5)N(8):Eu (M = Sr, Ba) are widely utilized in white light-emitting diodes (WLEDs) because of their improvement of the color rendering index (CRI), which is brilliant for warm white light emission. Nitride-based phosphors are adopted in high-performance applications because of their excellent thermal and chemical stabilities. A series of nitridosilicate phosphor compounds, M(2-x)Si(5)N(8):Eu(x) (M = Sr, Ba), were prepared by solid-state reaction. The thermal degradation in air was only observed in Sr(2-x)Si(5)N(8):Eu(x) with x = 0.10, but it did not appear in Sr(2-x)Si(5)N(8):Eu(x) with x = 0.02 and Ba analogue with x = 0.10. This is an unprecedented investigation to study this phenomenon in the stable nitrides. The crystal structural variation upon heating treatment of these compounds was carried out using the in situ XRD measurements. The valence of Eu ions in these compounds was determined by electron spectroscopy for chemical analysis (ESCA) and X-ray absorption near-edge structure (XANES) spectroscopy. The morphology of these materials was examined by transmission electron microscopy (TEM). Combining all results, it is concluded that the origin of the thermal degradation in Sr(2-x)Si(5)N(8):Eu(x) with x = 0.10 is due to the formation of an amorphous layer on the surface of the nitride phosphor grain during oxidative heating treatment, which results in the oxidation of Eu ions from divalent to trivalent. This study provides a new perspective for the impact of the degradation problem as a consequence of heating processes in luminescent materials.
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Affiliation(s)
- Chiao-Wen Yeh
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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Yeh CW, Liu YP, Xiao ZR, Wang YK, Hu SF, Liu RS. Luminescence and density functional theory (DFT) calculation of undoped nitridosilicate phosphors for light-emitting diodes. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16302k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Chen L, Chu CI, Chen KJ, Chen PY, Hu SF, Liu RS. An intelligent approach to the discovery of luminescent materials using a combinatorial approach combined with Taguchi methodology. LUMINESCENCE 2011. [DOI: 10.1002/bio.1347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Chen L, Chu CI, Chen KJ, Chen PY, Hu SF, Liu RS. An intelligent approach to the discovery of luminescent materials using a combinatorial approach combined with Taguchi methodology. LUMINESCENCE 2011; 26:229-38. [DOI: 10.1002/bio.1318] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 04/05/2011] [Accepted: 04/19/2011] [Indexed: 11/11/2022]
Affiliation(s)
| | - Cheng-I Chu
- Department of Chemistry; National Taiwan University; Taipei
| | - Kuo-Ju Chen
- Institute of Electro-optical Science and Technology; National Taiwan Normal University; Taipei; Taiwan
| | - Po-Yuan Chen
- Institute of Electro-optical Science and Technology; National Taiwan Normal University; Taipei; Taiwan
| | - Shu-Fen Hu
- Department of Physics; National Taiwan Normal University; Taipei; Taiwan
| | - Ru-Shi Liu
- Department of Chemistry; National Taiwan University; Taipei
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