一种新型有机硅离子液体电解液在超级电容中的应用

doi:10.3866/PKU.WHXB201207181

Abstract

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

ZhONG Hao-Xiang, ZHAO Chun-Bao, LUO Hao, ZHANG Ling-Zhi. Novel Organosilicon Ionic Liquid Based Electrolytes for Supercapacitors[J]. Acta Phys. -Chim. Sin. 2012, 28(11), 2641-2647. doi: 10.3866/PKU.WHXB201207181

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Novel Organosilicon Ionic Liquid Based Electrolytes for Supercapacitors

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