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Chen Z, Wu J, Yang Y, Yan L, Gao X. Achieving a smooth "adsorption-diffusion-conversion" of polysulfides enabled by MnO 2-ZnS p-n heterojunction for Li-S battery. J Colloid Interface Sci 2024; 666:322-330. [PMID: 38603875 DOI: 10.1016/j.jcis.2024.04.001] [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: 01/28/2024] [Revised: 03/31/2024] [Accepted: 04/01/2024] [Indexed: 04/13/2024]
Abstract
The commercial application of lithium-sulfur batteries is primarily impeded by the constant shuttling of soluble polysulfides and sluggish redox kinetics. Nowadays, the discovery of the heterojunction, which combines materials with diverse properties, offers a new perspective for overcoming these obstacles. Herein, a functional coating separator for the lithium-sulfur battery is designed using a MnO2-ZnS p-n heterojunction with a spontaneous built-in electric field (BIEF). The MnO2 nanowire provides suitable adsorption capacity for polysulfides, while the abundant reactive sites brought by ZnS ensure efficient conversion. Moreover, the BIEF significantly facilitates the migration of electrons and polysulfides at the MnO2-ZnS interface, enabling a smooth "adsorption-diffusion-conversion" reaction mechanism. By serving as both the adsorption module and catalytic sites, this BIEF allows batteries utilizing separators modified with MnO2-ZnS heterojunction to achieve an impressive initial capacity of 1511.1 mAh g-1 at 0.1C and maintain a capacity decay rate of merely 0.048% per cycle at 2.0C after 1000 cycles. Even when increasing sulfur loading to 9.4 mg cm-2 in lean electrolyte (5.4 μL mg-1), the battery still exhibits an ultrahigh areal capacity of 6.0 mAh cm-2 after 100 cycles.
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Affiliation(s)
- Zhiyuan Chen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Material, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China
| | - Jie Wu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Material, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China
| | - Yunfei Yang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Material, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China
| | - Lijing Yan
- College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China.
| | - Xuehui Gao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Material, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China; College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
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Chen Z, Wu J, Jiang M, Yang Y, Cao W, Zhang J, Gao X, Hu E, Chen Z. Reinforcing the Adsorption and Conversion of Polysulfides in Li-S Battery by Incorporating Molybdenum into MnS/MnO Nanorods. Chemistry 2024; 30:e202303507. [PMID: 37994505 DOI: 10.1002/chem.202303507] [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: 10/24/2023] [Revised: 11/22/2023] [Accepted: 11/22/2023] [Indexed: 11/24/2023]
Abstract
The Sabatier principle suggests that an excessive adsorption of lithium polysulfides (LiPSs) by metal compounds may hinder their conversion in the absence of a conversion module. Therefore, it is imperative to establish a synergetic effect mechanism between "strong adsorption" and "rapid conversion" for LiPSs. To achieve this coexistence, a molybdenum-doped MnS/MnO@C porous structure is designed as a multifunctional coating on the polypropylene (PP) separator. The incorporation of MnS/MnO@C enhances the adsorption capacity towards LiPSs, while molybdenum facilitates subsequent conversion. Benefiting from the synergistic effect of each component and its large specific surface area, the cell with Mo-doped MnS/MnO@C coating achieves smooth adsorption-diffusion-conversion processes and exhibits an appreciable rate performance with outstanding cycling stability. Even when sulfur loading increases to 9.68 mg cm-2 , the modified battery delivers an excellent initial areal capacity of 11.69 mAh cm-2 and maintains 6.97 mAh cm-2 after 50 cycles at 0.1 C. This study presents a promising approach to simultaneously accomplish "strong adsorption" and "rapid conversion" of polysulfides, offering novel perspectives for devising dual-functional modified separators.
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Affiliation(s)
- Zhiyuan Chen
- Department of Chemistry, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Jie Wu
- Department of Chemistry, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Muxi Jiang
- Department of Chemistry, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Yunfei Yang
- Department of Chemistry, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Wen Cao
- Department of Chemistry, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Jing Zhang
- Department of Chemistry, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Xuehui Gao
- Department of Chemistry, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Enlai Hu
- Department of Chemistry, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Zhongwei Chen
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2 L 3G1, Canada
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
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Wang J, Xu Y, Xu Z, Shan Y, Yang J, Luo Z, Yang H, Guo X, Lu J. The Voltage-Adaptive Effect in Lithium-Sulfur Batteries Integrated with an Electron-Conductive Interlayer. SMALL METHODS 2023; 7:e2300662. [PMID: 37526329 DOI: 10.1002/smtd.202300662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/20/2023] [Indexed: 08/02/2023]
Abstract
Lithium-sulfur (Li-S) batteries are considered as one of the top competitors to go beyond Li-ion batteries. However, the shuttle effect triggered by soluble lithium polysulfides (LPSs) brings great troubles for understanding the solid-liquid-solid conversion process of the sulfur cathode. Herein, a new characterization technique is developed to deepen the understanding of such soluble LPSs shuttling, by integrating an electron-conductive interlayer. The voltage of the interlayer exhibits a voltage-adaptive effect to the cathode, indicating the true dependence of the open-circuit voltages on the LPSs instead of on the solid cathodes. Furthermore, a quantitative method can be introduced to monitor the shuttling LPSs by such interlayer design, and it shows great potential to be a new standard technique, providing direct comparison of the shuttle effect between different studies. The newly developed interlayer design paves an avenue to gain new insight into the reaction process and improve the performance of Li-S batteries.
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Affiliation(s)
- Junzhang Wang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Yunkai Xu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Zhou Xu
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Yunpeng Shan
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Jingting Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Zhongkuan Luo
- Zhejiang-California International Nanosystems Institute, Zhejiang University, Hangzhou, 310058, China
| | - Hui Yang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, China
- Zhejiang-California International Nanosystems Institute, Zhejiang University, Hangzhou, 310058, China
| | - Xingzhong Guo
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 311200, China
| | - Jun Lu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310058, China
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