期刊
ELECTROCHIMICA ACTA
卷 392, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.139013
关键词
Energy storage; Lithium-sulfur battery; Shuttle effect; Polysulfide confinement
资金
- National Research Foundation, Prime Minister's Office, Singapore, under its Campus for Research Excellence and Technological Enterprise (CREATE) program
- Singapore Ministry of Education Tier 1 grant [2019-T1-002-125]
The dissolution of polysulfides in ether-based electrolytes is necessary for high capacity in lithium-sulfur batteries, suggesting that preventing polysulfide dissolution in such electrolytes might not be the right approach. Other strategies should be developed for designing electrolyte/cathode for high-energy LSBs.
The dissolution of polysulfides is widely considered to be a major obstacle for developing lithium-sulfur batteries (LSBs) because it results in a shuttle effect. A popular strategy to address this issue is prevent -ing polysulfide dissolution, e.g., trapping/confining polysulfides in porous carbons. However, this conflicts with the advantage of commonly used ether-based electrolytes, i.e., the dissolution of polysulfides in such electrolytes is beneficial for delivering Li + to sulfur-based species compared to sluggish solid-state trans-port. Thus, a question is raised on the feasibility of the strategy to prevent polysulfide dissolution. Here, it is shown that the dissolution of polysulfides in ether-based electrolytes is necessary for a high capacity, suggesting that it might not be right to prevent the dissolution of polysulfides in such electrolytes. Thus, other approaches should be developed. A perspective is hence provided for designing electrolyte/cathode for high-energy LSBs. (c) 2021 Elsevier Ltd. All rights reserved.
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