Additive-containing ionic liquid electrolytes for secondary lithium battery

被引：95

作者：

Xu, Jinqiang ^{[1
]}

Yang, Jun ^{[1
]}

NuLi, Yanna ^{[1
]}

Wang, Jiulin ^{[1
]}

Zhang, Zongshuang ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Chem Engn, Shanghai 200240, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2006年 / 160卷 / 01期

基金：

中国国家自然科学基金;

关键词：

room temperature ionic liquids; additives; lithium anode; cycling efficiency;

D O I：

10.1016/j.jpowsour.2006.01.054

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Room temperature ionic liquid (RTIL) consisting of N-methyl-N-propylpiperidinium (PP13) cation and bis(trifluoromethanesulfonyl)imide (TFSI) anion was synthesized and its electrochemical stability was investigated in comparison with 1-butyl-3-methylimidazolium tetrafluoroborate (BMIBF4) and 1-butyl-3-methylimidazolium hexafluorophosphate (BMIPF6). The electrochemical window of PP13-TFSI (5.8 V versus Li/Li+) is wider than that of BMIBF4 (4.7 V) and BMIPF6 (4.5 V). The cathodic limit of the PP13-TFSI is about -0.3 V versus Li/Li+, against 0.7 V for BMIPF6 and BMIBF4, so it may be used as the electrolyte for second lithium batteries based on lithium anode. In this work, charge efficiency of lithium plating/striping on nickel substrate and the cycle life have been measured using 0.4 M LiTFSI/PP13-TFSI electrolyte both without and with additives such as vinyl acetate (VA), ethylene sulfite (ES), and ethylene carbonate (EC). Remarkable improvement in cycling efficiency and cycle life was found for EC as additive. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：621 / 626

页数：6

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