Long-chain solid organic polysulfide cathode for high-capacity secondary lithium batteries
| Autor: | Dawei Wang, Lin-Yun Jang, Sasanka Dalapati, Donglin Jiang, Qingcong Zeng, Kuang-Hsu Wu, Bing-Jian Su, Ian R. Gentle, Ning Huang, Yang Li |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Lithium vanadium phosphate battery Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element High capacity 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences Sulfur Cathode 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Chemical engineering law General Materials Science Lithium 0210 nano-technology Long chain Polysulfide |
| Zdroj: | Energy Storage Materials. 12:30-36 |
| ISSN: | 2405-8297 |
| DOI: | 10.1016/j.ensm.2017.11.007 |
| Popis: | Organic polysulfides are linear sulfur chains (R–S n –R, n ≥ 2) capped with organic moieties, and are appealing cathode materials in lithium batteries. The theoretical capacity of polysulfides essentially relies on the length of the sulfur chains; long-chain polysulfides could store more charges than short-chain polysulfides. Herein, we report the successful synthesis of a long-chain solid organic polysulfide (SOPS) by a radical coupling method and disclose its functions as high capacity cathode materials for secondary lithium batteries. The capped, long-chain polysulfide offers the fast charge transfer and thereby enabling the better performance than the pure sulfur. The SOPS cathode reaches an initial capacity of 1166 mA h g −1 SOPS at 750 mA g −1 , and maintains a high capacity of 674 mA h g –1 SOPS at 3000 mA g –1 . |
| Databáze: | OpenAIRE |
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