Affiliation:
1. Sauvage Center for Molecular Sciences College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University Wuhan 430072 China
2. The Institute for Advanced Studies Wuhan University Wuhan 430072 China
3. Institute for Superconducting & Electronic Materials University of Wollongong Innovation Campus Wollongong NSW 2500 Australia
Abstract
AbstractThe lithium–sulfur battery is considered to be one of the most promising rechargeable energy storage systems because of its high theoretical energy density. Unfortunately, the shuttle effect during cycling causes serious loss of sulfur species and corrosion of the lithium metal anode, resulting in severe capacity decay. This work proposes to completely suppress the shuttle effect of lithium polysulfides (LiPSs) without sacrificing the interfacial Li+ transport, through in situ construction of a compact cathode electrolyte interphase (CEI), which is formed of the reaction between vinylene carbonate (VC), bis(trifluoromethane)sulfonimide ions and LiPSs in a self‐limiting manner during the initial discharge process. Hence, the CEI‐confined sulfur cathode in the VC‐based electrolyte with a solid phase conversion mechanism delivers a long‐term cycling stability and high‐rate performance, as well as excellent performance under an extreme climate in a subzero temperature of −20 °C, limited lithium source with a low N/P ratio of 1.1, and even at mechanical mutilation. The present study reveals an appealing approach to tailor the composition and interfacial structure of sulfur cathodes by in situ construction of a robust, self‐healing, and high Li+ conductive CEI from the aspect of electrolyte, and thus completely solve the issue of the shuttle effect.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Hubei Province
Australian Research Council
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment
Cited by
15 articles.
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