An Effective Approach To Protect Lithium Anode and Improve Cycle Performance for Li鈥揝 Batteries
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- 作者：Feng Wu ; Ji Qian ; Renjie Chen ; Jun Lu ; Li Li ; Huiming Wu ; Junzheng Chen ; Teng Zhao ; Yusheng Ye ; Khalil Amine
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2014
- 出版时间：September 10, 2014
- 年：2014
- 卷：6
- 期：17
- 页码：15542-15549
- 全文大小：552K
- ISSN：1944-8252
文摘
Lithium oxalyldifluoroborate (LiODFB) has been investigated as an organic electrolyte additive to improve the cycling performance of Li鈥揝 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.