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Wang, Yun‐Xiao; Lai, Wei‐Hong; Wang, Yun‐Xia; Chou, Shu‐Lei; Ai, Xinping; Yang, Hanxi; Cao, Yuliang
Angewandte Chemie, December 16, 2019, Volume: 58, Issue: 51Journal Article
Emerging rechargeable sodium‐ion storage systems—sodium‐ion and room‐temperature sodium–sulfur (RT‐NaS) batteries—are gaining extensive research interest as low‐cost options for large‐scale energy‐storage applications. Owing to their abundance, easy accessibility, and unique physical and chemical properties, sulfur‐based materials, in particular metal sulfides (MSx) and elemental sulfur (S), are currently regarded as promising electrode candidates for Na‐storage technologies with high capacity and excellent redox reversibility based on multielectron conversion reactions. Here, we present current understanding of Na‐storage mechanisms of the S‐based electrode materials. Recent progress and strategies for improving electronic conductivity and tolerating volume variations of the MSx anodes in Na‐ion batteries are reviewed. In addition, current advances on S cathodes in RT‐NaS batteries are presented. We outline a novel emerging concept of integrating MSx electrocatalysts into conventional carbonaceous matrices as effective polarized S hosts in RT‐NaS batteries as well. This comprehensive progress report could provide guidance for research toward the development of S‐based materials for the future Na‐storage techniques. Sulfur‐based electrode materials are currently regarded as promising candidates for sodium‐storage technologies, especially for sodium‐ion (Na‐ion) and room‐temperature sodium–sulfur (RT‐NaS) batteries. In this Minireview on the progress of electrodes based on metal sulfides and elemental sulfur, material design and performance enhancement are highlighted and sodium‐storage mechanisms for both battery systems are discussed.
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