物理化学学报 >> 2012, Vol. 28 >> Issue (11): 2641-2647.doi: 10.3866/PKU.WHXB201207181

电化学和新能源 上一篇    下一篇

一种新型有机硅离子液体电解液在超级电容中的应用

仲皓想, 赵春宝, 骆浩, 张灵志   

  1. 中国科学院广州能源研究所, 广州 510640
  • 收稿日期:2012-07-02 修回日期:2012-07-18 发布日期:2012-10-17
  • 通讯作者: 张灵志 E-mail:lzzhang@ms.giec.ac.cn
  • 基金资助:

    国家自然科学基金(50973112);广州市科技计划项目(11A44061500);中国科学院院地合作项目(2010(8))和中国科学院百人计划项目资助

Novel Organosilicon Ionic Liquid Based Electrolytes for Supercapacitors

ZhONG Hao-Xiang, ZHAO Chun-Bao, LUO Hao, ZHANG Ling-Zhi   

  1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
  • Received:2012-07-02 Revised:2012-07-18 Published:2012-10-17
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50973112); Science and Technology Plan Project of Guangzhou Municipality, China (11A44061500); Chinese Academy of Sciences -Guangdong Collaboration Program (2010(8)); and the Hundred Talents Program of Chinese Academy of Sciences (CAS).

摘要:

设计合成了一种新型有机硅室温离子液体(SiN1IL), 并对其化学结构和电化学窗口进行表征, 通过与具有高介电常数的丙烯碳酸酯(PC)/低粘度的乙腈(AN)匹配组成电解液, 其离子电导率达到商业实际应用的要求(19.6 mS·cm-1). 对以活性炭(AC)为对称电极的超级电容器的电化学性能测试表明, SiN1IL 基电解液与活性炭有很好的界面相容性, 其高倍率充放电、阻抗性能优于商用四乙基四氟硼酸铵(Et4NBF4)/PC 电解液, 在电流密度为1000 mA·g-1的条件下, 工作电压为2.7 V, 其比电容为108 F·g-1.

关键词: 有机硅, 离子液体, 超级电容器, 电解液, 活性炭

Abstract:

A novel room temperature organosilicon ionic liquid (SiN1IL) was synthesized and its chemical structure and electrochemical window were characterized. The ionic conductivity of SiN1IL/propylene carbonate (PC)/acetonitrile (AN) solution was 19.6 mS·cm-1, comparable with the commercial electrolytes currently used in supercapacitors. The electrochemical performance of the cells using activated carbon as electrodes and SiN1IL-based formula with PC/AN as electrolytes was systematically evaluated. SiN1IL/PC electrolyte exhibited superior rate capability and lower impedance compared to a conventional electrolyte (tetraethylammonium tetrafluoroborate (Et4NBF4)/PC). Upon applying a working voltage of 2.7 V, the SiN1IL/PC cell had a specific capacitance of 108 F·g-1 at a current density of 1000 mA·g-1.

Key words: Organosilicon, Ionic liquid, Supercapacitor, Electrolyte, Activated carbon

MSC2000: 

  • O646