In situ protection of a sulfur cathode and a lithium anode via adopting a fluorinated electrolyte for stable lithium-sulfur batteries

投稿的翻译标题: 采用氟化电解液对硫正极和锂负极进行原位保护构筑稳定的锂硫电池

Xue Chen, Haijin Ji, Weilun Chen, Jingyi Wu, Fei Hu, Lixia Yuan, Zhen Li, Yunhui Huang

科研成果: 期刊稿件文章同行评审

13 引用 (Scopus)

摘要

Lithium-sulfur (Li−S) batteries are regarded as one of the most promising next-generation energy storage systems due to their high theoretical energy density and low material cost. However, the conventional ether-based electrolytes of Li−S batteries are extremely flammable and have high solubility of lithium polysulfides (LiPS), resulting in a high safety risk and a poor life cycle. Herein, we report an ether/carbonate co-solvent fluorinated electrolyte with a special solvation sheath of Li+, which can prevent the formation of dissoluble long-chain LiPS of the sulfur cathode, restrict Li dendrite growth at the anode side, and show fire resistance in combustion experiments. As a result, the proposed Li−S batteries with 70 wt% sulfur content in its cathode deliver stable life cycle, low self-discharge ratio, and intrinsic safety. Therefore, the unique passivation characteristics of the designed fluorinated electrolyte break several critical limitations of the traditional “liquid phase”-based Li−S batteries, offering a facile and promising way to develop long-life and high-safety Li−S batteries.[Figure not available: see fulltext.].

投稿的翻译标题采用氟化电解液对硫正极和锂负极进行原位保护构筑稳定的锂硫电池
源语言英语
页(从-至)2127-2138
页数12
期刊Science China Materials
64
9
DOI
出版状态已出版 - 9月 2021
已对外发布

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