The effect of ILs as co-salts in electrolytes for high voltage supercapacitors

被引：33

作者：

Kwon, Ha-Na ^{[1
,2
]}

Jang, Su-Jin ^{[1
,2
]}

Kang, Yun Chan ^{[2
]}

Roh, Kwang Chul ^{[1
]}

机构：

[1] Korea Inst Ceram Engn & Technol, Div Energy & Environm, Energy Efficient Mat Team, Soho Ro 101, Jinju Si 52581, Gyeongnam, South Korea

[2] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

关键词：

IONIC-LIQUID; CAPACITANCE; PERFORMANCE; MIXTURES; DENSITY; CARBON;

D O I：

10.1038/s41598-018-37322-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Ionic liquids (ILs) which have electrical stability are attractive materials to enhance the potential window of electrolyte. According to the potential window is extended, available voltage for supercapacitor is broaden. In this study, the addition of ILs which is 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) and 1-ethyl-3-methylimidazolium bis(trifluoromethylesulfonyl) imide (EMITFSI) as co-salts, to a supercapacitor electrolyte increases the ionic conductivity and stability of it due to inhibition of electrolyte decomposition. As a result, the electrochemical stability potential windows (ESPWs) of supercapacitor is improved and the supercapacitor exhibited increased cycling stability. The loss of specific capacitance upon addition of 7 wt% EMIBF4 or EMITFSI to the electrolyte was 2.5% and 8.7%, respectively, after 10,000 cycles at 3.5 V, compared to the specific capacitance of the initial discharge.

引用

页数：6

共 25 条

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