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

作者：Wu Feng; Qian Ji; Chen Renjie^*; Lu Jun; Li Li; Wu Huiming; Chen Junzheng; Zhao Teng; Ye Yusheng; Amine Khalil

来源：ACS Applied Materials & Interfaces, 2014, 6(17): 15542-15549.

DOI：10.1021/am504345s

• lithium-sulfur batteries
• lithium anode
• electrolyte
• LIODFB
• passivation layer
• electrochemistry

Lithium oxalyldifluoroborate (LiODFB) has been investigated as an organic electrolyte additive to improve the cycling performance of LiS 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.

• 出版日期2014-9-10
• 单位北京理工大学