Novel ionic liquid based electrolyte for double layer capacitors with enhanced high potential stability

被引：9
作者：
Zhang, Lan
Dong, Kun
Chen, Shimou
Zhang, Suojiang [1 ]
机构：
[1] Chinese Acad Sci, Inst Proc & Engn, Beijing Key Lab Ion Liquids Clean Chem Proc, Beijing 100190, Peoples R China
来源：
SCIENCE CHINA-CHEMISTRY | 2016年 / 59卷 / 05期
基金：
中国国家自然科学基金;
关键词：
double layer capacitor; ionic liquid electrolyte; high potential; succinonitrile; SPIRO-(1,1')-BIPYRROLIDINIUM TETRAFLUOROBORATE; SUCCINONITRILE; MIXTURES; LITHIUM; SALT;
D O I：
10.1007/s11426-016-5588-x
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Developing electrolyte with high electrochemical stability is the most effective way to improve the energy density of double layer capacitors (DLCs), and ionic liquid is a promising choice. Herein, a novel ionic liquid based high potential electrolyte with a stabilizer, succinonitrile, was proposed to improve the high potential stability of the DLC. The electrolyte with 7.5 wt% succinonitrile added has a high ionic conductivity of 41.1 mS cm(-1) under ambient temperature, and the DLC adopting this electrolyte could be charged to 3.0 V with stable cycle ability even under a discharge current density of 6 A g(-1). Moreover, the energy density could be increased by 23.4% when the DLC was charged to 3.0 V compared to that charged to 2.7 V.
引用
收藏
页码：547 / 550
页数：4
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