四氢呋喃预处理对吡咯修饰金属锂电极性能的影响

doi:10.3866/PKU.WHXB20110708

物理化学学报 >> 2011, Vol. 27 >> Issue (07): 1695-1700.doi: 10.3866/PKU.WHXB20110708

四氢呋喃预处理对吡咯修饰金属锂电极性能的影响

吴梅芬, 温兆银, 刘宇

中国科学院上海硅酸盐研究所, 上海 200050

收稿日期:2011-02-18 修回日期:2011-04-29 发布日期:2011-06-28
通讯作者: 温兆银 E-mail:zywen@mail.sic.ac.cn
基金资助:
国家自然科学基金(50973127), 国家重点基础研究发展计划项目(973) (2007CB209700)及上海市科委(08DZ2210900)资助

Effects of Tetrahydrofuran Pretreatment on the Performance of Pyrrole Modified Li Metal Electrode

WU Mei-Fen, WEN Zhao-Yin, LIU Yu

Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China

Received:2011-02-18 Revised:2011-04-29 Published:2011-06-28
Contact: WEN Zhao-Yin E-mail:zywen@mail.sic.ac.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (50973127), National Key Basic Research Program of China (973) (2007CB209700), and Science and Technology Commission of Shanghai Municipality, China (08DZ2210900).

摘要/Abstract

摘要：

采用四氢呋喃对金属锂电极进行预处理, 以减少电极表面杂质和吡咯化锂钝化膜形成过程中产生的气体, 从而提高电极表面钝化膜的致密性和电极的充放电循环性能. 实验结果表明: 采用四氢呋喃对金属锂电极预处理后, 电极表面杂质显著减少, 能在电极表面形成一层更加均匀而致密的吡咯化锂钝化膜. 该钝化膜使得电极界面阻抗降低, 界面稳定, 金属锂溶解沉积过程的可逆性增加. 金属锂呈“海绵”状均匀沉积, 有效抑制或减少了锂枝晶或“死锂”的产生, 提高了金属锂的循环效率.

关键词: 金属锂, 四氢呋喃, 吡咯, 钝化膜, 预处理

Abstract:

To get rid of impurities on a Li surface and avoid hydrogen gas generation during the preparation of a lithium pyrrolide film, tetrahydrofuran (THF) was used to pretreat the surface of a Li electrode. We found that THF pretreatment can obviously refresh the Li surface as well as improve the uniformity and density of the lithium pyrrolide film. The interface resistance effectively decreases and the interfacial stability improves. Additionally, the reversibility of the lithium deposition/dissolution process increases. All the ‘sponge-shaped’ lithium deposits are homogeneously distributed on the electrode surface and the lithium cycling efficiency is enhanced by THF pretreatment.

Key words: Li metal, Tetrahydrofuran, Pyrrole, Passive film, Pretreatment

吴梅芬, 温兆银, 刘宇. 四氢呋喃预处理对吡咯修饰金属锂电极性能的影响[J]. 物理化学学报, 2011, 27(07), 1695-1700. doi: 10.3866/PKU.WHXB20110708

WU Mei-Fen, WEN Zhao-Yin, LIU Yu. Effects of Tetrahydrofuran Pretreatment on the Performance of Pyrrole Modified Li Metal Electrode[J]. Acta Phys. -Chim. Sin. 2011, 27(07), 1695-1700. doi: 10.3866/PKU.WHXB20110708

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB20110708

https://www.whxb.pku.edu.cn/CN/Y2011/V27/I07/1695

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四氢呋喃预处理对吡咯修饰金属锂电极性能的影响

Effects of Tetrahydrofuran Pretreatment on the Performance of Pyrrole Modified Li Metal Electrode

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