An in-situ solidification strategy to block polysulfides in Lithium-Sulfur batteries
| Autor: | Ke Chen, Kuang He, Feng Li, Bo Li, Dawei Wang, Zhenhua Sun, Zan Lian, Hui-Ming Cheng, Xiaoyin Zhang, Pei Tang, Ruopian Fang |
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| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element Lithium–sulfur battery 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Sulfur Redox 0104 chemical sciences chemistry.chemical_compound Chemical engineering chemistry General Materials Science 0210 nano-technology Dissolution Polysulfide |
| Zdroj: | Energy Storage Materials. 37:224-232 |
| ISSN: | 2405-8297 |
| Popis: | Lithium-sulfur (Li-S) batteries have recently emerged as a promising candidate for next-generation energy storage systems. Yet the polysulfide dissolution and shuttle issues cause severe performance degradation, hindering their practical use. Here, we report an in-situ solidification strategy for efficient polysulfide blocking via nucleophilic substitution reactions triggered by 2, 5-dichloro-1, 4-benzoquinone (DCBQ) in the electrolyte. Polysulfides could be covalently fixed by DCBQ in the form of solid organosulfur to enable effective immobilization of polysulfides within the cathode, contributing to high capacity-retention. Moreover, the benzoquinonyl groups of DCBQ were found able to accelerate the lithium-ion transport and promote the sulfur redox reaction kinetics. Consequently, the Li-S cell with DCBQ exhibited good electrochemical performances. This approach demonstrates a novel avenue for polysulfide blocking to boost Li-S battery performance. |
| Databáze: | OpenAIRE |
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