材料科学
硫黄
涂层
储能
化学工程
锂(药物)
纳米技术
量子力学
医学
物理
工程类
内分泌学
功率(物理)
冶金
作者
Jianjun Song,Dawei Su,Xiuqiang Xie,Xin Guo,Weizhai Bao,Guangjie Shao,Guoxiu Wang
标识
DOI:10.1021/acsami.6b09027
摘要
Lithium-sulfur batteries have attracted increasing attention as one of the most promising candidates for next-generation energy storage systems. However, the poor cycling performance and the low utilization of sulfur greatly hinder its practical applications. Here we report the improved performance of lithium-sulfur batteries by coating Ti3C2Tx MXene nanosheets (where T stands for the surface termination, such as -O, -OH, and/or -F) on commercial "Celgard" membrane. In favor of the ultrathin two-dimensional structure, the Ti3C2Tx MXene can form a uniform coating layer with a minimum mass loading of 0.1 mg cm-2 and a thickness of only 522 nm. Owing to the improved electric conductivity and the effective trapping of polysulfides, the lithium-sulfur batteries with MXene-functionalized separators exhibit superior performance including high specific capacities and cycling stability.
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