有机硫化合物
硫黄
阴极
材料科学
电化学
多硫化物
聚合物
锂(药物)
电解质
无机化学
化学工程
化学
电极
物理化学
复合材料
内分泌学
冶金
工程类
医学
作者
Xiaoyin Zhang,Guangjian Hu,Ke Chen,Linyun Shen,Ru Xiao,Pei Tang,Chenglin Yan,Hui‐Ming Cheng,Zhenhua Sun,Feng Li
标识
DOI:10.1016/j.ensm.2021.11.014
摘要
Severe shuttle effect of sulfur cathodes hinders commercial application of lithium-sulfur batteries. Current technologies for sulfur cathodes by physical confinement and chemical absorptions are not enough to solve the issues of the sulfur cathodes. Organosulfur cathodes with solid-solid conversions were proposed to fundamentally avoid shuttle effect. However, in previous reports, low sulfur content and complicated electrochemical process prevent application of organosulfur cathodes in lithium-sulfur batteries. Herein, we report new solid-solid conversion based on the organosulfur cathodes in ether-based electrolytes by developing sulfur-chain controlling strategy to obtain trisulfide polymers with high sulfur content over 76 wt%. Furthermore, reaction mechanism of sulfur-based cathodes is analyzed by constructing different sulfur chains based on the strategy. Theoretical calculations suggest polymers with disulfide bonds might exhibit new lithiation behavior, which is consistent with electrochemical results. This work demonstrates new electrochemical behavior of organosulfur cathode with solid-solid conversion and show promising application prospect of these polymers.
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