Applications of cyanate ionic liquids in graphene-based supercapacitors

ZHANG Lifeng; DU Suqing; LIU Yi; YUAN Xiaoyan; HUANG Jianfeng; GUO Shouwu

doi:10.11949/j.issn.0438-1157.20160870

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Applications of cyanate ionic liquids in graphene-based supercapacitors

更新时间：2025-11-26

- Applications of cyanate ionic liquids in graphene-based supercapacitors
- CIESC Journal Issue 12, Pages: 5276-5282(2016)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160870
  CLC： 613.71
- Online First：05 December 2016，
  
  Published：05 December 2016
- 稿件说明：
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ZHANG Lifeng, DU Suqing, LIU Yi, et al. Applications of cyanate ionic liquids in graphene-based supercapacitors[J]. CIESC Journal, 2016, (12): 5276-5282.
DOI：

ZHANG Lifeng, DU Suqing, LIU Yi, et al. Applications of cyanate ionic liquids in graphene-based supercapacitors[J]. CIESC Journal, 2016, (12): 5276-5282. DOI： 10.11949/j.issn.0438-1157.20160870.

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。

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.

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