Enhanced cycle performance of a Li-S battery based on a protected lithium anode
Enhanced cycle performance of a Li-S battery based on a protected lithium anode
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基于受保护的锂阳极的锂硫电池的增强循环性能
DOI：
10.1039/c4ta04172k
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发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Wu, Xiangwei
中科院分区：
文献类型：
--
作者：
Ma, Guoqiang;Wen, Zhaoyin;Wu, Xiangwei
在锂阳极表面制备导电聚合物层，作为锂硫电池的保护层。有了保护层，在醚基电解质与锂阳极之间形成稳定且电阻较小的SEI，既能有效抑制锂阳极与锂多硫化物之间的腐蚀反应，又能抑制锂枝晶的生长。特别是，在电极和商业电解质上加载约2.5-3 mg cm（-2）的硫时，在0.5 C下循环300次后，放电容量保持在815 mA h g(-1)，平均库仑效率为91.3%。
A conductive polymer layer is prepared on the surface of a lithium anode as the protective layer for a Li-S battery. With the protective layer, a stable and less resistive SEI is formed between the ether-based electrolyte and the Li anode, it can not only inhibit the corrosion reaction between the lithium anode and lithium polysulfides effectively, but also suppress the growth of Li dendrites. Particularly, with approximately 2.5-3 mg cm(-2) sulfur loading on the electrode and commercial electrolyte, the discharge capacity remains at 815 mA h g(-1) after 300 cycles at 0.5 C with an average coulombic efficiency of 91.3%.