多硫化物
电解质
硫黄
电化学
锂(药物)
化学
阴极
氧化还原
无机化学
电极
有机化学
医学
内分泌学
物理化学
作者
Shuru Chen,Fang Dai,Mikhail L. Gordin,Zhaoxin Yu,Yue Gao,Jiangxuan Song,Donghai Wang
标识
DOI:10.1002/anie.201511830
摘要
Abstract Lithium–sulfur (Li‐S) batteries have recently received great attention because they promise to provide energy density far beyond current lithium ion batteries. Typically, Li‐S batteries operate by conversion of sulfur to reversibly form different soluble lithium polysulfide intermediates and insoluble lithium sulfides through multistep redox reactions. Herein, we report a functional electrolyte system incorporating dimethyl disulfide as a co‐solvent that enables a new electrochemical reduction pathway for sulfur cathodes. This pathway uses soluble dimethyl polysulfides and lithium organosulfides as intermediates and products, which can boost cell capacity and lead to improved discharge–charge reversibility and cycling performance of sulfur cathodes. This electrolyte system can potentially enable Li‐S batteries to achieve high energy density.
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