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Ma S, Wei K, Zhao Y, Qiu J, Xu R, Li H, Zhang H, Cui Y. Vanadium pentoxide interfacial layer enables high performance all-solid-state thin film batteries. RSC Adv 2024; 14:15261-15269. [PMID: 38741967 PMCID: PMC11089530 DOI: 10.1039/d4ra01849d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Accepted: 04/20/2024] [Indexed: 05/16/2024] Open
Abstract
Lithium cobalt oxide (LiCoO2) is considered as one of the promising building blocks that can be used to fabricate all-solid-state thin film batteries (TFBs) because of its easy accessibility, high working voltage, and high energy density. However, the slow interfacial dynamics between LiCoO2 and LiPON in these TFBs results in undesirable side reactions and severe degradation of cycling and rate performance. Herein, amorphous vanadium pentoxide (V2O5) film was employed as the interfacial layer of a cathode-electrolyte solid-solid interface to fabricate all-solid-state TFBs using a magnetron sputtering method. The V2O5 thin film layer assisted in the construction of an ion transport network at the cathode/electrolyte interface, thus reducing the electrochemical redox polarization potential. The V2O5 interfacial layer also effectively suppressed the side reactions between LiCoO2 and LiPON. In addition, the interfacial resistance of TFBs was significantly decreased by optimizing the thickness of the interfacial modification layer. Compared to TFBs without the V2O5 layer, TFBs based on LiCoO2/V2O5/LiPON/Li with a 5 nm thin V2O5 interface modification layer exhibited a much smaller charge transfer impedance (Rct) value, significantly improved discharge specific capacity, and superior cycling and rate performance. The discharge capacity remained at 75.6% of its initial value after 1000 cycles at a current density of 100 μA cm-2. This was mainly attributed to the enhanced lithium ion transport kinetics and the suppression of severe side reactions at the cathode-electrolyte interface in TFBs based on LiCoO2/V2O5/LiPON/Li with a 5 nm V2O5 thin layer.
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Affiliation(s)
- Shiping Ma
- Laboratory of Electrochemical Power Sources, Institute of Electronic Engineering, China Academy of Engineering Physics Mianyang Sichuan 621000 P. R. China
| | - Kaiyuan Wei
- College of Chemistry and Materials Engineering, Anhui Science and Technology University Bengbu 233000 P. R. China
| | - Yu Zhao
- Laboratory of Electrochemical Power Sources, Institute of Electronic Engineering, China Academy of Engineering Physics Mianyang Sichuan 621000 P. R. China
| | - Jinxu Qiu
- Laboratory of Electrochemical Power Sources, Institute of Electronic Engineering, China Academy of Engineering Physics Mianyang Sichuan 621000 P. R. China
| | - Rongrui Xu
- Laboratory of Electrochemical Power Sources, Institute of Electronic Engineering, China Academy of Engineering Physics Mianyang Sichuan 621000 P. R. China
| | - Hongliang Li
- Laboratory of Electrochemical Power Sources, Institute of Electronic Engineering, China Academy of Engineering Physics Mianyang Sichuan 621000 P. R. China
| | - Hui Zhang
- School of Advanced Materials and Nanotechnology, Xidian University Xi'an 710126 P. R. China
| | - Yanhua Cui
- Laboratory of Electrochemical Power Sources, Institute of Electronic Engineering, China Academy of Engineering Physics Mianyang Sichuan 621000 P. R. China
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Bi W, Jiang X, Li C, Liu Y, Gao G, Wu G, Atif M, AlSalhi M, Cao G. Effects of Valence States of Working Cations on the Electrochemical Performance of Sodium Vanadate. ACS APPLIED MATERIALS & INTERFACES 2022; 14:19714-19724. [PMID: 35441507 DOI: 10.1021/acsami.2c02920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Supercapacitors have received much attention as large-scale energy storage devices for high power density and ultralong cycling life. In this work, sodium vanadate Na0.76V6O15/poly(3,4-ethylenedioxythiophene) (PEDOT) nanocables with deficient bridge oxygen at the interface (denoted Vo••-PNVO) have been tailored for supercapacitors through the in situ polymerization of 3,4-ethylenedioxythiophene and studied using three different electrolytes. Experiments and theoretical calculations reveal that all Na+, Zn2+, and Al3+ ions appear as hydrates in aqueous solutions but insert into the crystal structure as Na+ ions and Zn2+-H2O and Al3+-H2O hydrates, respectively. In comparison with the Zn2+-H2O and Al3+-H2O hydrates, Na+ ions with a smaller radius diffuse more quickly in Vo••-PNVO. Thus, Vo••-PNVO delivers better charge storage capability and stability when an electrolyte with Na+ ions is used. The results strongly suggest that an electrostatic interaction is significant in determining transport properties and storage capacities, rather than hydrate radii or valence states.
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Affiliation(s)
- Wenchao Bi
- Departments of Physics, College of Science, University of Shanghai for Science and Technology, Shanghai 200093, People's Republic of China
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120, United States
| | - Xiaodi Jiang
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Chao Li
- Departments of Physics, College of Science, University of Shanghai for Science and Technology, Shanghai 200093, People's Republic of China
| | - Yuan Liu
- Departments of Physics, College of Science, University of Shanghai for Science and Technology, Shanghai 200093, People's Republic of China
| | - Guohua Gao
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Guangming Wu
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Muhammad Atif
- Research Chair on Laser Diagnosis of Cancers, Department of Physics and Astronomy, College of Science, King Saud University, 11451 Riyadh, Saudi Arabia
- Department of Physics and Astronomy, College of Science, King Saud University, 11451 Riyadh, Saudi Arabia
| | - Mohamad AlSalhi
- Research Chair on Laser Diagnosis of Cancers, Department of Physics and Astronomy, College of Science, King Saud University, 11451 Riyadh, Saudi Arabia
- Department of Physics and Astronomy, College of Science, King Saud University, 11451 Riyadh, Saudi Arabia
| | - Guozhong Cao
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120, United States
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3
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V2O5/Carbon Nanotube/Polypyrrole Based Freestanding Negative Electrodes for High-Performance Supercapacitors. Catalysts 2021. [DOI: 10.3390/catal11080980] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
In this study, the vanadium pentoxide (V2O5), functionalized carbon nanotubes (f-CNT), and polypyrrole (PPy) based composites films have been prepared through a facile synthesis method and their electrochemical performance were evaluated as freestanding negative electrodes of supercapacitor. A hydrous V2O5 gel prepared by treating V2O5 powder with H2O2 was mixed with f-CNT to obtain V2O5/f-CNT composite film. V2O5/f-CNT composite was then coated with PPy through vapor phase polymerization method. The PPy deposited on the V2O5/f-CNT prevented the dissolution of V2O5 and thus resulted in an improved the capacitance and cycle life stability for V2O5/f-CNT/PPy composite electrode. V2O5/f-CNT/PPy freestanding negative electrode exhibited a high areal capacitance value (1266 mF cm−2 at a current density of 1 mA cm−2) and good cycling stability (83.0% capacitance retention after 10,000 charge-discharge cycles). The superior performance of the V2O5/f-CNT/PPy composite electrode can be attributed to the synergy between f-CNT with high conductivity and V2O5 and PPy with high-energy densities. Thus, V2O5/f-CNT/PPy composite based electrode can effectively mitigate the drawbacks of the low specific capacitance of CNTs and the poor cycling life of V2O5.
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Wavhal BA, Ghosh M, Sharma S, Kurungot S, Sk A. A high-voltage non-aqueous hybrid supercapacitor based on the N2200 polymer supported over multiwalled carbon nanotubes. NANOSCALE 2021; 13:12314-12326. [PMID: 34254629 DOI: 10.1039/d1nr01422f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
P(NDI2OD-T2), also known as Polyera ActivInk N2200, is a widely accepted non-fullerene acceptor polymer that is used prominently in the energy harvesting application due to its ease of synthesis, high electron mobility, and other desirable semiconducting properties. With its recent foray into energy storage applications, there is tremendous potential for developing composites of N2200 with carbon nanotubes (CNTs) to improve its electrical properties and extend its applicability. Here we report a facile synthesis of an N2200 composite with multiwalled carbon nanotubes (MWCNTs) following an in situ approach to include MWCNTs into the polymer matrix, improving its electrochemical performance in an organic electrolyte (1 M LiClO4/propylene carbonate). The composite material with an optimum MWCNT content exhibits prominent redox behavior delivering a specific capacity of 80 mA h g-1(polymer) in a standard three-electrode cell. Moreover, the N2200/MWCNT composite material showing a battery-type electrochemical signature could perform as an efficient negative electrode in a high-voltage (2.4 V) hybrid supercapacitor device comprising capacitive activated carbon as the positive electrode.
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Affiliation(s)
- Bhaiyyasaheb Anurath Wavhal
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India.
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Jiao Y, Wan C, Wu Y, Han J, Bao W, Gao H, Wang Y, Wang C, Li J. Ultra-high rate capability of nanoporous carbon network@V 2O 5 sub-micron brick composite as a novel cathode material for asymmetric supercapacitors. NANOSCALE 2020; 12:23213-23224. [PMID: 33206083 DOI: 10.1039/d0nr04000b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A green biomass-derived nanoporous carbon network (NCN) has been prepared and integrated with V2O5 sub-micron bricks (SMBs). The large surface area and high pore volume of the NCN can not only provide abundant sites for electrochemical reactions but also stabilize the structure of the V2O5 SMBs. The NCN@V2O5 SMB composite, acting as a novel cathode material, delivers a high areal capacitance of 786 mF cm-2 at 0.2 mA cm-2 and superior cycling stability with 89.5% capacitance retention after 5000 cycles. Besides, the electrode achieves an ultra-high rate capability (82% capacitance retention as the current density increases from 0.2 to 5 mA cm-2) since the contribution from the non-diffusion-controlled process is estimated to be as high as 95.5%-98.5% according to the kinetic analysis. Furthermore, the micropores are more favorable than the mesopores at lower current densities (0.2-2 mA cm-2), while the contribution of the external surface area becomes more significant for current densities higher than 2 mA cm-2. Moreover, an asymmetric supercapacitor assembled using this cathode and the NCN anode shows superior electrochemical properties, such as wide operating voltage, long cycle life and large energy density (72.2 μW h cm-2). Their excellent electrochemical features and good eco-friendliness confirm the potential of the NCN@V2O5 SMBs for use as supercapacitors.
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Affiliation(s)
- Yue Jiao
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, PR China.
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Haider WA, He L, Mirza HA, Tahir M, Khan AM, Owusu KA, Yang W, Wang Z, Mai L. Bilayered microelectrodes based on electrochemically deposited MnO 2/polypyrrole towards fast charge transport kinetics for micro-supercapacitors. RSC Adv 2020; 10:18245-18251. [PMID: 35517224 PMCID: PMC9053735 DOI: 10.1039/d0ra01702g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 04/18/2020] [Indexed: 01/20/2023] Open
Abstract
Micro-supercapacitors (MSCs) are promising power solution facilities for miniaturized portable electronic devices. Microfabrication of on-chip MSC with high specific capacitance and high energy density is still a great challenge. Herein, we report a high-performance MnO2/polypyrrole (PPy) microelectrode based MSC (MnO2/PPy-MSC) by modern micromachining technology. Interdigital Au micro current collectors were obtained by photolithography, physical vapor deposition and lift off. A layer of PPy was electrochemically deposited on Au current collectors followed by deposition of urchin-like MnO2 micro/nanostructures. The electrochemical performance of MnO2/PPy-MSC was explored employing LiClO4/PVA gel electrolyte. The assembled MSC demonstrated a high areal capacitance of 13 mF cm-2, an energy density of 1.07 × 10-3 mW h cm-2 and a power density of 0.53 mW cm-2. In addition, the MnO2/PPy-MSC showed an improved cycling stability, retaining 84% of the initial capacitance after 5000 CV cycles at a scan rate of 500 mV s-1. Our proposed strategy provides a versatile and promising method for the fabrication of high-performance MSCs with large-scale applications.
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Affiliation(s)
- Waqas Ali Haider
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 Hubei China
| | - Liang He
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 Hubei China
| | - Hameed A Mirza
- Department of Chemistry, York University Toronto M3J 1P3 Ontario Canada
- A.S. Chemical Laboratories Inc. Concord L4K 4M4 Ontario Canada
| | - Muhammad Tahir
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 Hubei China
| | - Aamir Minhas Khan
- Department of Electrical Engineering and Computer Science, York University Toronto M3J 1P3 Ontario Canada
| | - Kwadwo Asare Owusu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 Hubei China
| | - Wei Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 Hubei China
| | - Zhuqing Wang
- Graduate School of Engineering, Tohoku University Sendai 980-8579 Japan
| | - Liqiang Mai
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 Hubei China
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Tao K, Wang L, Hai Y, Gong Y. P-Functionalized and O-deficient TiO n/VO m nanoparticles grown on Ni foam as an electrode for supercapacitors: epitaxial grown heterojunction and visible-light-driven photoresponse. Dalton Trans 2020; 49:4476-4490. [PMID: 32191247 DOI: 10.1039/d0dt00317d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
P-TiOn-VOm nanowires were grown on nickel foam (NF) via a one-pot hydrothermal method and by further vapor deposition/phosphorization method. It was found that low valence states of titanium oxide and deficient-oxygen coexist in P-TiOn-VOm/NF. Furthermore, (TiO1.25)3.07 (denoted as TiOn) and VO (denoted as VOm) possess similar structures and matched facets, and their epitaxial growth leads to the formation of TiOn/VOm heterostructure with a formation energy of -1.59 eV. P-TiOn-VOm/NF possesses good electron conductivity and electrons can be transferred from Ti to V centers, as evidenced by the DFT calculations and the XPS spectra. As a result, the specific capacity of P-TiOn-VOm/NF can reach 785 C g-1 at 1 A g-1 in the potential range of 0-0.55 V vs. Hg/HgO, which is much larger than those of VOm/NF, P-VOm/NF, and P-TiO2-VOm/NF. On the other hand, the TiOn/VOm heterostructure also favors the separation and transfer of photoinduced electrons and holes, and P-TiOn-VOm/NF exhibits visible-light-driven photoresponse. Under visible light illumination, the specific capacity of P-TiOn-VOm/NF is increased by 6.2% relative to that in the dark. Furthermore, the P-TiOn-VOm/NF//activated carbon (AC) asymmetric supercapacitor (ASC) shows an energy density of 37.2 W h kg-1 at a power density of 1 kW kg-1 and excellent cycling performance with 93.6% capacity retention after 10 000 cycles at 5 A g-1, which is comparable to and even superior to those of titanium oxides and vanadium oxides. A promising achievement has been proposed to improve the energy storage performance of P-TiOn-VOm through P-functionalization and O-deficiency in this work.
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Affiliation(s)
- Keyu Tao
- Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
| | - Lian Wang
- Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
| | - Yang Hai
- Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
| | - Yun Gong
- Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
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8
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Hu B, Guo C, Xu C, Cen Y, Hu J, Li Y, Yang S, Liu Y, Yu D, Chen C. Rational Construction of V
2
O
5
@rGO with Enhanced Pseudocapacitive Storage for High‐Performance Flexible Energy Storage Device. ChemElectroChem 2019. [DOI: 10.1002/celc.201901680] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Bingbing Hu
- College of Chemistry and Chemical EngineeringChongqing University Chongqing 401331 China
| | - Chaozhong Guo
- Research Institute for New Materials Technology, Engineering Research Center of New Energy Storage Devices and ApplicationsChongqing University of Arts and Sciences Chongqing 402160 China
| | - Chuanlan Xu
- College of Chemistry and Chemical EngineeringChongqing University Chongqing 401331 China
| | - Yuan Cen
- College of Chemistry and Chemical EngineeringChongqing University Chongqing 401331 China
| | - Jiahong Hu
- College of Chemistry and Chemical EngineeringChongqing University Chongqing 401331 China
| | - Yan Li
- College of Chemistry and Chemical EngineeringChongqing University Chongqing 401331 China
| | - Shu Yang
- College of Chemistry and Chemical EngineeringChongqing University Chongqing 401331 China
| | - Yuping Liu
- College of Chemistry and Chemical EngineeringChongqing University Chongqing 401331 China
| | - Danmei Yu
- College of Chemistry and Chemical EngineeringChongqing University Chongqing 401331 China
| | - Changguo Chen
- College of Chemistry and Chemical EngineeringChongqing University Chongqing 401331 China
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Bi W, Wang J, Jahrman EP, Seidler GT, Gao G, Wu G, Cao G. Interface Engineering V 2 O 5 Nanofibers for High-Energy and Durable Supercapacitors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901747. [PMID: 31215181 DOI: 10.1002/smll.201901747] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/21/2019] [Indexed: 05/27/2023]
Abstract
A local electric field is induced to engineer the interface of vanadium pentoxide nanofibers (V2 O5 -NF) to manipulate the charge transport behavior and obtain high-energy and durable supercapacitors. The interface of V2 O5 -NF is modified with oxygen vacancies (Vö) in a one-step polymerization process of polyaniline (PANI). In the charge storage process, the local electric field deriving from the lopsided charge distribution around Vö will provide Coulombic forces to promote the charge transport in the resultant Vö-V2 O5 /PANI nanocable electrode. Furthermore, an ≈7 nm porous PANI coating serves as the external percolated charge transport pathway. As the charge transfer kinetics are synergistically enhanced by the dual modifications, Vö-V2 O5 /PANI-based supercapacitors exhibit an excellent specific capacitance (523 F g-1 ) as well as a long cycling lifespan (110% of capacitance remained after 20 000 cycles). This work paves an effective way to promote the charge transfer kinetics of electrode materials for next-generation energy storage systems.
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Affiliation(s)
- Wenchao Bi
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195-2120, USA
| | - Jichao Wang
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Evan P Jahrman
- Department of Physics, University of Washington, Seattle, WA, 98195-1560, USA
| | - Gerald T Seidler
- Department of Physics, University of Washington, Seattle, WA, 98195-1560, USA
| | - Guohua Gao
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Guangming Wu
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Guozhong Cao
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195-2120, USA
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Shi Z, Chu W, Hou Y, Gao Y, Yang N. Asymmetric supercapacitors with high energy densities. NANOSCALE 2019; 11:11946-11955. [PMID: 31188368 DOI: 10.1039/c9nr02607j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The low energy densities of supercapacitors (SCs) are generally limited by the used anodes. To develop SCs with high energy densities, Fe3+ modified V2O5@GQDs (m-V2O5@GQDs) and ZIF-67-derived nanoporous carbon loaded with Mn3O4 (C/N-Mn3O4) were synthesized. After their detailed characterization using electron microscopy, X-ray methods and electrochemical techniques, they were further utilized as the anode and the cathode, respectively, to construct asymmetric supercapacitors (ASCs). The as-synthesized m-V2O5@GQDs improve the poor conductivity of V2O5, contributing greatly to a specific capacitance of 761 F g-1 at a current density of 2 A g-1. With application of a cell voltage of 2 V, an energy density of up to 99.4 W h kg-1 is achieved at a power density of 1000 W kg-1. Such ASCs also exhibit outstanding cycling performance (95% of initial capacitance even after 10 000 charging/discharging cycles). This study thus provides a new way to design and construct ASCs with high energy densities.
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Affiliation(s)
- Zijun Shi
- College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, People's Republic of China.
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Zhang X, Fu Q, Huang H, Wei L, Guo X. Silver-Quantum-Dot-Modified MoO 3 and MnO 2 Paper-Like Freestanding Films for Flexible Solid-State Asymmetric Supercapacitors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1805235. [PMID: 30821918 DOI: 10.1002/smll.201805235] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/19/2019] [Indexed: 05/20/2023]
Abstract
Free-standing paper-like thin-film electrodes have great potential to boost next-generation power sources with highly flexible, ultrathin, and lightweight requirements. In this work, silver-quantum-dot- (2-5 nm) modified transition metal oxide (including MoO3 and MnO2 ) paper-like electrodes are developed for energy storage applications. Benefitting from the ohmic contact at the interfaces between silver quantum dots and MoO3 nanobelts (or MnO2 nanowires) and the binder-free nature and 0D/1D/2D nanostructured 3D network of the fabricated electrodes, substantial improvements on the electrical conductivity, efficient ionic diffusion, and areal capacitances of the hybrid nanostructure electrodes are observed. With this proposed strategy, the constructed asymmetric supercapacitors, with Ag quantum dots/MoO3 "paper" as anode, Ag quantum dots/MnO2 "paper" as cathode, and neutral Na2 SO4 /polyvinyl alcohol hydrogel as electrolyte, exhibit significantly enhanced energy and power densities in comparison with those of the supercapacitors without modification of Ag quantum dots on electrodes; present excellent cycling stability at different current densities and good flexibility under various bending states; offer possibilities as high-performance power sources with low cost, high safety, and environmental friendly properties.
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Affiliation(s)
- Xingyan Zhang
- Laboratory of Solid State Ionics, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Qiangang Fu
- C/C Composites Research Center, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Heming Huang
- Laboratory of Solid State Ionics, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Lu Wei
- Laboratory of Solid State Ionics, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Xin Guo
- Laboratory of Solid State Ionics, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
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12
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Majumdar D, Mandal M, Bhattacharya SK. V
2
O
5
and its Carbon‐Based Nanocomposites for Supercapacitor Applications. ChemElectroChem 2019. [DOI: 10.1002/celc.201801761] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Dipanwita Majumdar
- Department of ChemistryChandernagore College Hooghly Pin-712136, WB India
| | - Manas Mandal
- Department of ChemistrySree Chaitanya College Habra, 24PGS(N) Pin-743268, WB India
- Department of Chemistry (Physical Chemistry Section)Jadavpur University Kolkata- 700032, WB India
| | - Swapan K. Bhattacharya
- Department of Chemistry (Physical Chemistry Section)Jadavpur University Kolkata- 700032, WB India
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