Citation: ZhONG Hao-Xiang, ZHAO Chun-Bao, LUO Hao, ZHANG Ling-Zhi. Novel Organosilicon Ionic Liquid Based Electrolytes for Supercapacitors[J]. Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB201207181 shu

Novel Organosilicon Ionic Liquid Based Electrolytes for Supercapacitors

1.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China

Received Date: 2 July 2012
Available Online: 18 July 2012
Fund Project: 国家自然科学基金(50973112) (50973112)广州市科技计划项目(11A44061500) (11A44061500)中国科学院院地合作项目(2010(8)) (2010(8))

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.
- Organosilicon,
- Ionic liquid,
- Supercapacitor,
- Electrolyte,
- Activated carbon
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1.
沈阳化工大学材料科学与工程学院沈阳 110142