One ether-functionalized guanidinium ionic liquid as new electrolyte for lithium battery

被引：53
作者：
Fang, Shaohua [1 ]
Tang, Yufeng [1 ]
Tai, Xingyao [1 ]
Yang, Li [1 ]
Tachibana, Kazuhiro [2 ]
Kamijima, Kouichi [3 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Technol, Shanghai 200240, Peoples R China
[2] Yamagata Univ, Fac Engn, Dept Chem & Chem Engn, Yamagata 9928510, Japan
[3] Hitachi Chem Co Ltd, Hitachi, Ibaraki 3178555, Japan
来源：
JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 03期
基金：
国家高技术研究发展计划(863计划);
关键词：
Lithium battery; Ionic liquid; Electrolyte; Ether-functionalized guanidinium cation; SALT BINARY ELECTROLYTES; SECONDARY BATTERIES; ELECTROCHEMICAL PROPERTIES; CATHODE; BIS(TRIFLUOROMETHANESULFONYL)IMIDE; REVERSIBILITY; DISCHARGE; CATIONS; BASE;
D O I：
10.1016/j.jpowsour.2010.08.012
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：
One ether-functionalized guanidinium ionic liquid is used as new electrolytes for lithium battery. Viscosity, conductivity, behavior of lithium redox, chemical stability against lithium metal, and charge-discharge characteristics of lithium batteries, are investigated for the II, electrolytes with different concentrations of lithium salt. Though the cathodic limiting potential of the IL are 0.7V vs. Li/Li+, the lithium plating and striping on Ni electrode can be observed in the IL electrolytes, and the IL electrolytes show good chemical stability against lithium metal. Li/LiCoO2 cells using the IL electrolytes without additives have good capacity and cycle property at the current rate of 0.2C when the LiTFSI concentration is higher than 0.3 molkg(-1), and the cell using the IL electrolyte with 0.75 molkg(-1) LiTFSI owns good rate property. The activation energies of the LiCoO2 electrode for lithium intercalation are estimated, and help to analyze the factors determining the rate property. (C) 2010 Elsevier B.V. All rights reserved.
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页码：1433 / 1441
页数：9
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