氰酸盐离子液体在石墨烯基超级电容器中的应用

doi:10.11949/j.issn.0438-1157.20160870

化工学报 ›› 2016, Vol. 67 ›› Issue (12): 5276-5282.DOI: 10.11949/j.issn.0438-1157.20160870

氰酸盐离子液体在石墨烯基超级电容器中的应用

张利锋¹, 杜素青¹, 刘毅¹, 原晓艳¹, 黄剑锋¹, 郭守武^1,2

1 陕西科技大学材料科学与工程学院, 陕西西安 710021;
2 上海交通大学电子信息与电气工程学院, 上海 200240

收稿日期:2016-06-27 修回日期:2016-09-19 出版日期:2016-12-05 发布日期:2016-12-05
通讯作者: 郭守武。swguo@sjtu.edu.cn
基金资助:
国家自然科学基金项目（21203116）；国家重点基础研究发展计划前期研究专项课题（2014CB260411）。

Applications of cyanate ionic liquids in graphene-based supercapacitors

ZHANG Lifeng¹, DU Suqing¹, LIU Yi¹, YUAN Xiaoyan¹, HUANG Jianfeng¹, GUO Shouwu^1,2

1 School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, China;
2 School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2016-06-27 Revised:2016-09-19 Online:2016-12-05 Published:2016-12-05
Supported by:
supported by the National Natural Science Foundation of China(21203116) and the Special Preliminary Study Plan of National Basic Research Program of China(2014CB260411).

摘要/Abstract

摘要：

将石墨烯电极与离子液体N-甲基-N-丙基吡咯烷氰酸盐（[C₃mpyr][OCN]）/碳酸丙烯酯（PC）混合电解液组装成超级电容器，采用循环伏安（CV）、交流阻抗（EIS）、恒电流充放电（GCD）等方法研究了其在50、60、70℃环境下的电化学性能。结果表明：该体系在较高温度下的电化学性能优异，70℃下其比容量最高可达295 F·g^-1，能量密度可达118 W·h·kg^-1，且恒电流充放电循环稳定性较好。

关键词: 超级电容器, 离子液体, 石墨烯, 电化学, 电解质

Abstract:

Supercapacitors were constructed with graphene as electrodes and ionic liquid N-methyl-N-propylpyrrolidinium cyanate([C₃mpyr] [OCN])/propylene carbonate(PC) as the mixed electrolytes. The electrochemical properties of constructed supercapacitors were tested at 50, 60 and 70℃ by cyclic voltammetry(CV), electrochemical impedance spectroscopy(EIS) and galvanostatic charge/discharge(GCD). The results indicated that the constructed supercapacitors exhibited good electrochemical properties at high operating temperatures. The supercapacitors gave the specific capacity of 295 F·g^-1 and delivered an energy density as high as 118 W·h·kg^-1 at 70℃ with the current density of 0.5 A·g^-1. Additionally, the constructed supercapacitors showed a good cycling stability.

Key words: supercapacitors, ionic liquids, graphene, electrochemistry, electrolytes

中图分类号:

O613.71

张利锋, 杜素青, 刘毅, 原晓艳, 黄剑锋, 郭守武. 氰酸盐离子液体在石墨烯基超级电容器中的应用[J]. 化工学报, 2016, 67(12): 5276-5282.

ZHANG Lifeng, DU Suqing, LIU Yi, YUAN Xiaoyan, HUANG Jianfeng, GUO Shouwu. Applications of cyanate ionic liquids in graphene-based supercapacitors[J]. CIESC Journal, 2016, 67(12): 5276-5282.

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氰酸盐离子液体在石墨烯基超级电容器中的应用

Applications of cyanate ionic liquids in graphene-based supercapacitors

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