An Effective Approach To Protect Lithium Anode and Improve Cycle Performance for Li–S Batteries

作者：Feng Wu, Ji Qian, Renjie Chen, Jun Biao Lu, Li Li, Huiming Wu, Junzheng Chen, Teng Zhao, Yusheng Ye, Khalil Amine · 发表于：ACS Applied Materials & Interfaces · 年份：2014 · DOI：10.1021/am504345s · 被引用次数：176 · 研究领域：Advanced Battery Materials and Technologies、Advancements in Battery Materials、Advanced Battery Technologies Research

Lithium oxalyldifluoroborate (LiODFB) has been investigated as an organic electrolyte additive to improve the cycling performance of Li-S batteries. Cell test results demonstrate that an appropriate amount of LiODFB added into the electrolyte leads to a high Coulombic efficiency. Analyses by energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and the density functional theory showed that LiODFB promotes the formation of a LiF-rich passivation layer on the lithium metal surface, which not only blocks the polysulfide shuttle, but also stabilizes the lithium surface.