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Mao S, Han X, Huang ZH, Li H, Ma T. Coordination and Hydrogen Bond Chemistry in Tungsten Oxide@Polyaniline Composite toward High-Capacity Aqueous Ammonium Storage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2405592. [PMID: 39155416 DOI: 10.1002/smll.202405592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2024] [Revised: 08/09/2024] [Indexed: 08/20/2024]
Abstract
Aqueous ammonium ion batteries (AAIBs) have garnered significant attention due to their unique energy storage mechanism. However, their progress is hindered by the relatively low capacities of NH4 + host materials. Herein, the study proposes an electrodeposited tungsten oxide@polyaniline (WOx@PANI) composite electrode as a NH4 + host, which achieves an ultrahigh capacity of 280.3 mAh g-1 at 1 A g-1, surpassing the vast majority of previously reported NH4 + host materials. The synergistic interaction of coordination chemistry and hydrogen bond chemistry between the WOx and PANI enhances the charge storage capacity. Experimental results indicate that the strong interfacial coordination bonding (N: →W6+) effectively modulates the chemical environment of W atoms, enhances the protonation level of PANI, and thus consequently the conductivity and stability of the composites. Spectroscopy analysis further reveals a unique NH4 +/H+ co-insertion mechanism, in which the interfacial hydrogen bond network (N-H···O) accelerates proton involvement in the energy storage process and activates the Grotthuss hopping conduction of H+ between the hydrated tungsten oxide layers. This work opens a new avenue to achieving high-capacity NH4 + storage through interfacial chemistry interactions, overcoming the capacity limitations of NH4 + host materials for aqueous energy storage.
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Affiliation(s)
- Shuai Mao
- Institute of Clean Energy Chemistry, Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning Province, College of Chemistry, Liaoning University, Shenyang, 110036, China
| | - Xu Han
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, China
| | - Zi-Hang Huang
- Institute of Clean Energy Chemistry, Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning Province, College of Chemistry, Liaoning University, Shenyang, 110036, China
| | - Hui Li
- Institute of Clean Energy Chemistry, Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning Province, College of Chemistry, Liaoning University, Shenyang, 110036, China
- Centre for Atomaterials and Nanomanufacturing (CAN), School of Science, RMIT University, Melbourne, VIC, 3000, Australia
| | - Tianyi Ma
- Centre for Atomaterials and Nanomanufacturing (CAN), School of Science, RMIT University, Melbourne, VIC, 3000, Australia
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Zhang X, Xie J, Lu Z, Liu X, Tang Y, Wang Y, Hu J, Cao Y. Engineering sulfur defective Bi 2S 3@C with remarkably enhanced electrochemical kinetics of lithium-ion batteries. J Colloid Interface Sci 2024; 667:385-392. [PMID: 38640657 DOI: 10.1016/j.jcis.2024.04.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/03/2024] [Accepted: 04/14/2024] [Indexed: 04/21/2024]
Abstract
Introducing the appropriate vacancies to augment the active sites and improve the electrochemical kinetics while maintaining high cyclability is a major challenge for its widespread application in electrochemical energy storage. Here, core-shell structured Bi2S3@C with sulfur vacancies was prepared by hydrothermal method and one-step carbonization/sulfuration process, which significantly improves the intrinsic electrical conductivity and ion transport efficiency of Bi2S3. Additionally, the uniform protective carbon layer around surface of composite maintains structural stability and effectively alleviates volume expansion during alloying/dealloying. As a result, the BSC-500 anode exhibits a brilliant reversible capacity of 636 mAh/g at 0.2 A/g and a long-term stable capacity of 524 mAh/g for 500 cycles at a high current density of 3 A/g in lithium-ion batteries. In addition, the assembled Bi2S3@C//LiCoO2 full cell delivered a capacity of 184 mAh/g at 1 A/g and excellent cyclability (125 mAh/g after 1000 cycles). The proposed strategy of combining sulfur vacancies with a core-shell structure to improve the electrochemical kinetics of Bi2S3 in lithium-ion batteries off the prospect for practical applications of transition metal sulfide anodes.
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Affiliation(s)
- Xiaojing Zhang
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China
| | - Jing Xie
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China.
| | - Zhenjiang Lu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China
| | - Xinhui Liu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China
| | - Yakun Tang
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China
| | - Yang Wang
- College of Chemistry, Chemical Engineering and Materials Science, Engineering Research Center for Intelligent Manufacturing of Functional Chemicals, Ministry of Education, Shandong Normal University, Jinan, Shandong Province 250014, PR China
| | - Jindou Hu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China
| | - Yali Cao
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China.
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Liang H, Wang X, Shi J, Chen J, Tian W, Huang M, Wu J, Zhu Y, Wang H. Design of heterostructured hydrangea-like FeS 2/MoS 2 encapsulated in nitrogen-doped carbon as high-performance anode for potassium-ion capacitors. J Colloid Interface Sci 2024; 664:96-106. [PMID: 38460388 DOI: 10.1016/j.jcis.2024.03.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/01/2024] [Accepted: 03/05/2024] [Indexed: 03/11/2024]
Abstract
The means of structural hybridization such as heterojunction construction and carbon-coating engineering for facilitating charge transfer and electron transport are considered viable strategies to address the challenges associated with the low rate capability and poor cycling stability of sulfide-based anodes in potassium-ion batteries (PIBs). Motivated by these concepts, we have successfully prepared a hydrangea-like bimetallic sulfide heterostructure encapsulated in nitrogen-doped carbon (FMS@NC) using a simple solvothermal method, followed by poly-dopamine wrapping and a one-step sulfidation/carbonization process. When served as an anode for PIBs, this FMS@NC demonstrates a high specific capacity (585 mAh g-1 at 0.05 A/g) and long cycling stability. Synergetic effects of mitigated volume expansions and enhanced conductivity that are responsbile for such high performance have been verified to originate from the heterostructured sulfides and the N-doped carbon matrix. Meanwhile, comprehensive characterization reveals existence of an intercalation-conversion hybrid K-ion storage mechanism in this material. Impressively, a K-ion capacitor with the FMS@NC anode and a commercial activated carbon cathode exhibits a superior energy density of up to 192 Wh kg-1, a high power density, and outstanding cycling stability. This study provides constructive guidance for designing high-performance and durable potassium-ion storage anodes for next-generation energy storage devices.
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Affiliation(s)
- Huanyu Liang
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Xinyu Wang
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Jing Shi
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Jingwei Chen
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Weiqian Tian
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Minghua Huang
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Jingyi Wu
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yue Zhu
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China.
| | - Huanlei Wang
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China.
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Gong F, Chen Z, Zhao Y, Zhang H, Zeng G, Yao C, Gong L, Zhang Y, Liu J, Wei S. Trifunctional L-Cysteine Assisted Construction of MoO 2/MoS 2/C Nanoarchitecture Toward High-Rate Sodium Storage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307986. [PMID: 38189535 DOI: 10.1002/smll.202307986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/11/2023] [Indexed: 01/09/2024]
Abstract
The volume collapse and slow kinetics reaction of anode materials are two key issues for sodium ion batteries (SIBs). Herein, an "embryo" strategy is proposed for synthesis of nanorod-embedded MoO2/MoS2/C network nanoarchitecture as anode for SIBs with high-rate performance. Interestingly, L-cysteine which plays triple roles including sulfur source, reductant, and carbon source can be utilized to produce the sulfur vacancy-enriched heterostructure. Specifically, L-cysteine can combine with metastable monoclinic MoO3 nanorods at room temperature to encapsulate the "nutrient" of MoOx analogues (MoO2.5(OH)0.5 and MoO3·0.5H2O) and hydrogen-deficient L-cysteine in the "embryo" precursor affording for subsequent in situ multistep heating treatment. The resultant MoO2/MoS2/C presents a high-rate capability of 875 and 420 mAh g-1 at 0.5 and 10 A g-1, respectively, which are much better than the MoS2-based anode materials reported by far. Finite element simulation and analysis results verify that the volume expansion can be reduced to 42.8% from 88.8% when building nanorod-embedded porous network structure. Theoretical calculations reveal that the sulfur vacancies and heterointerface engineering can promote the adsorption and migration of Na+ leading to highly enhanced thermodynamic and kinetic reaction. The work provides an efficient approach to develop advanced electrode materials for energy storage.
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Affiliation(s)
- Feilong Gong
- Key Laboratory of Surface and Interface Science and Technology of Henan Province, College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450001, P. R. China
| | - Zhilin Chen
- Key Laboratory of Surface and Interface Science and Technology of Henan Province, College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450001, P. R. China
| | - Yang Zhao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, P. R. China
| | - Hongge Zhang
- Key Laboratory of Surface and Interface Science and Technology of Henan Province, College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450001, P. R. China
| | - Guang Zeng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, P. R. China
| | - Cuijie Yao
- Key Laboratory of Surface and Interface Science and Technology of Henan Province, College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450001, P. R. China
| | - Lihua Gong
- Key Laboratory of Surface and Interface Science and Technology of Henan Province, College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450001, P. R. China
| | - Yonghui Zhang
- Key Laboratory of Surface and Interface Science and Technology of Henan Province, College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450001, P. R. China
| | - Jian Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, P. R. China
- DICP-Surrey Joint Centre for Future Materials, Department of Chemical and Process Engineering and Advanced Technology Institute of University of Surrey, Guildford, Surrey, GU2 7XH, UK
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, P. R. China
| | - Shizhong Wei
- Key Laboratory of Surface and Interface Science and Technology of Henan Province, College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450001, P. R. China
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5
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Zhu K, Gao S, Bai T, Li H, Zhang X, Mu Y, Guo W, Cui Z, Wang N, Zhao Y. Heterogeneous MoS 2 Nanosheets on Porous TiO 2 Nanofibers toward Fast and Reversible Sodium-Ion Storage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402774. [PMID: 38805741 DOI: 10.1002/smll.202402774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/15/2024] [Indexed: 05/30/2024]
Abstract
2D layered molybdenum disulfide (MoS2) has garnered considerable attention as an attractive electrode material in sodium-ion batteries (SIBs), but sluggish mass transfer kinetic and capacity fading make it suffer from inferior cycle capability. Herein, hierarchical MoS2 nanosheets decorated porous TiO2 nanofibers (MoS2 NSs@TiO2 NFs) with rich oxygen vacancies are engineered by microemulsion electrospinning method and subsequent hydrothermal/heat treatment. The MoS2 NSs@TiO2 NFs improves ion/electron transport kinetic and long-term cycling performance through distinctive porous structure and heterogeneous component. Consequently, the electrode exhibits excellent long-term Na storage capacity (298.4 mAh g-1 at 5 A g-1 over 1100 cycles and 235.6 mAh g-1 at 10 A g-1 over 7200 cycles). Employing Na3V2(PO4)3 as cathode, the full cell maintains a desirable capacity of 269.6 mAh g-1 over 700 cycles at 1.0 A g-1. The stepwise intercalation-conversion and insertion/extraction endows outstanding Na+ storage performance, which yields valuable insight into the advancement of fast-charging and long-cycle life SIBs anode materials.
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Affiliation(s)
- Keping Zhu
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Songwei Gao
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, China
| | - Tonghua Bai
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Huaike Li
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Xuefeng Zhang
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Yue Mu
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Wei Guo
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Zhiming Cui
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Nü Wang
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Yong Zhao
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot, 010051, China
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6
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Kang J, Peng Y, Zhu L, Tang Y, Teng F, Guo G, Xiang Y, Huang Y, Wu X, Wu X. 3D Fast Sodium Transport Network of MoS 2 Endowed by Coupling of Sulfur Vacancies and Sn Doping for Outstanding Sodium Storage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309112. [PMID: 38150610 DOI: 10.1002/smll.202309112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/23/2023] [Indexed: 12/29/2023]
Abstract
A sulfur vacancy-rich, Sn-doped as well as carbon-coated MoS2 composite (Vs-SMS@C) is rationally synthesized via a simple hydrothermal method combined with ball-milling reduction, which enhances the sodium storage performance. Benefiting from the 3D fast Na+ transport network composed of the defective carbon coating, Mo─S─C bonds, enlarged interlayer spacing, S-vacancies, and lattice distortion in the composite, the Na+ storage kinetics is significantly accelerated. As expected, Vs-SMS@C releases an ultrahigh reversible capacity of 1089 mAh g-1 at 0.1 A g-1, higher than the theoretical capacity. It delivers a satisfactory capacity of 463 mAh g-1 at a high current density of 10 A g-1, which is the state-of-the-art rate capability compared to other MoS2 based sodium ion battery anodes to the knowledge. Moreover, a super long-term cycle stability is achieved by Vs-SMS@C, which keeps 91.6% of the initial capacity after 3000 cycles under the current density of 5 A g-1 in the voltage of 0.3-3.0 V. The sodium storage mechanism of Vs-SMS@C is investigated by employing electrochemical methods and ex situ techniques. The synergistic effect between S-vacancies and doped-Sn is evidenced by DFT calculations. This work opens new ideas for seeking excellent metal sulfide anodes.
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Affiliation(s)
- Jia Kang
- School of Physics and Electromechanical Engineering, School of Chemistry and Chemical Engineering, and Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, Jishou University, Jishou, 416000, China
| | - Yan Peng
- Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Laboratory for Quantum Engineering and Micro-Nano Energy Technology, and School of Physics and Optoelectronics, Xiangtan University, Hunan, 411105, China
| | - Ling Zhu
- School of Physics and Electromechanical Engineering, School of Chemistry and Chemical Engineering, and Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, Jishou University, Jishou, 416000, China
| | - Yao Tang
- School of Physics and Electromechanical Engineering, School of Chemistry and Chemical Engineering, and Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, Jishou University, Jishou, 416000, China
| | - Feiyang Teng
- School of Physics and Electromechanical Engineering, School of Chemistry and Chemical Engineering, and Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, Jishou University, Jishou, 416000, China
| | - Gencai Guo
- Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Laboratory for Quantum Engineering and Micro-Nano Energy Technology, and School of Physics and Optoelectronics, Xiangtan University, Hunan, 411105, China
| | - Yanhong Xiang
- School of Physics and Electromechanical Engineering, School of Chemistry and Chemical Engineering, and Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, Jishou University, Jishou, 416000, China
| | - Yonggang Huang
- School of Physics and Electromechanical Engineering, School of Chemistry and Chemical Engineering, and Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, Jishou University, Jishou, 416000, China
| | - Xianming Wu
- School of Physics and Electromechanical Engineering, School of Chemistry and Chemical Engineering, and Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, Jishou University, Jishou, 416000, China
| | - Xianwen Wu
- School of Physics and Electromechanical Engineering, School of Chemistry and Chemical Engineering, and Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, Jishou University, Jishou, 416000, China
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Guo Y, Xia Q, Chang Y, Wang L, Zhou A. Facile preparation of MoO 3@Mo 2CT xnanocomposite with high lithium storage performance by in situoxidation. NANOTECHNOLOGY 2024; 35:165403. [PMID: 38176069 DOI: 10.1088/1361-6528/ad1b01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 01/04/2024] [Indexed: 01/06/2024]
Abstract
In this work, a new MoO3@Mo2CTxnanocomposite was prepared from two-dimensional (2D) Mo2CTxMXene byin situoxidization in air, which exhibited wonderful lithium-storage performance as anodes of lithium-ion batteries (LIBs). The precursor Mo2CTxwas synthesized from Mo2Ga2C by selective etching of NH4F at 180 °C for 24 h. Thereafter, the Mo2CTxwas oxidized in air at 450 °C for 30 min to obtain MoO3@Mo2CTxnanocomposite. In the composite,in situgenerated MoO3nanocrystals pillar the layer structure of Mo2CTxMXene, which increases the interlayer space of Mo2CTxfor Li storage and enhances the structure stability of the composite. Mo2CTx2D sheets provide a conductive substrate for MoO3nanocrystals to enhance the Li+accessibility. As anodes of LIBs, the final discharge specific capacity of the MoO3@Mo2CTxcomposite was 511.1 mAh g-1at a current density of 500 mA g-1after 100 cycles, which is about 36.7 times that of pure Mo2CTxMXene (13.9 mAh g-1) and 3.2 times that of pure MoO3(159.9 mAh g-1). In the composites, both Mo2CTxand MoO3provide high lithium storage capacity and can enhance the performance of each other. Moreover, this composite can be made by a facile method ofin situoxidation. Therefore, the MoO3@Mo2CTxMXene nanocomposite is a promising anode of LIB with high performance.
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Affiliation(s)
- Yitong Guo
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, People's Republic of China
| | - Qixun Xia
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, People's Republic of China
| | - Yukai Chang
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, People's Republic of China
| | - Libo Wang
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, People's Republic of China
| | - Aiguo Zhou
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, People's Republic of China
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He Y, Luo Y, Zhang W, Liu S, Zhu K, Huang L, Yang Y, Li X, Yu R, Shu H, Wang X, Chen M. MoO 2/t-C 3N 4 Heterogeneous Materials with Bidirectional Catalysis for the Rapid Conversion of S Species in Li-S Batteries. ACS APPLIED MATERIALS & INTERFACES 2023; 15:45915-45925. [PMID: 37737741 DOI: 10.1021/acsami.3c10104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Li-S batteries have drawn a lot of attention for their high theoretical specific capacity and significant economic benefits. However, the shuttle effect of polysulfides prevents them from being used widely. To tackle this difficulty, a heterogeneous structure based on tubular carbon nitride with evenly dispersed molybdenum dioxide nanoparticles (MoO2/t-C3N4) as the S host is constructed in this work. As a polar material with a large specific surface area, MoO2/t-C3N4 has a strong anchoring effect on polysulfide. Additionally, the heterogeneous material has excellent bidirectional catalytic ability for the redox process of S species based on the action of the built-in electric field formed by electron directional transfer. Not only does it improve the reaction kinetics of the redox process of the polysulfides but it also prevents polysulfides from accumulating on the surface of the modified material and deactivating it, further improving the utilization of the active material. Thus, MoO2/t-C3N4/S shows the high initial-discharge specific capacity of 812.7 mAh g-1 at the current density of 5C, and the Coulombic efficiency is maintained at more than 95% after 400 charge/discharge cycles. Moreover, MoO2/t-C3N4/S achieved a capacity retention of 89% after 100 cycles at the current density of 0.1C under the high S loading. Therefore, the research results of this work provide a trustworthy reference for the future commercial application of Li-S batteries.
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Affiliation(s)
- Yongqian He
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Yixin Luo
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Wanqi Zhang
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Sisi Liu
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Kai Zhu
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Li Huang
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Yue Yang
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Xin Li
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Ruizhi Yu
- Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Ningbo 315211, P.R. China
| | - Hongbo Shu
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Xianyou Wang
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Manfang Chen
- National Base for International Science & Technology Cooperation, School of Chemistry, Xiangtan University, Xiangtan 411105, China
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9
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German E, Gebauer R. The Oxygen Evolution Reaction at MoS 2 Edge Sites: The Role of a Solvent Environment in DFT-Based Molecular Simulations. Molecules 2023; 28:5182. [PMID: 37446844 DOI: 10.3390/molecules28135182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/23/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023] Open
Abstract
Density functional theory (DFT) calculations are employed to study the oxygen evolution reaction (OER) on the edges of stripes of monolayer molybdenum disulfide. Experimentally, this material has been shown to evolve oxygen, albeit with low efficiency. Previous DFT studies have traced this low catalytic performance to the unfavourable adsorption energies of some reaction intermediates on the MoS2 edge sites. In this work, we study the effects of the aqueous liquid surrounding the active sites. A computational approach is used, where the solvent is modeled as a continuous medium providing a dielectric embedding of the catalyst and the reaction intermediates. A description at this level of theory can have a profound impact on the studied reactions: the calculated overpotential for the OER is lowered from 1.15 eV to 0.77 eV. It is shown that such variations in the reaction energetics are linked to the polar nature of the adsorbed intermediates, which leads to changes in the calculated electronic charge density when surrounded by water. These results underline the necessity to computationally account for solvation effects, especially in aqueous environments and when highly polar intermediates are present.
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Affiliation(s)
- Estefania German
- Department of Theoretical, Atomic and Optical Physics, University of Valladolid, 47011 Valladolid, Spain
| | - Ralph Gebauer
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34151 Trieste, Italy
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