Room-temperature phosphonium ionic liquids for supercapacitor application

被引：171

作者：

Frackowiak, E ^{[1
]}

Lota, G ^{[1
]}

Pernak, J ^{[1
]}

机构：

[1] Poznan Tech Univ, PL-60965 Poznan, Poland

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 16期

关键词：

D O I：

10.1063/1.1906320

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ionic liquids (ILs) have been used as electrolytes for supercapacitors. Two phosphonium salts such as trihexyl(tetradecyl.)phosphonium bis(trifluoromethylsulfonyl)imide (IL1) and trihexyl(tetradecyl) phosphonium dicyanamide (IL2) have been selected for this target. To decrease the viscosity of ILs, a small amount of acetonitrile (from 5 to 25 wt %) was added. Supercapacitor based on activated carbon (AC) as electrodes and IL1 with 25 wt % of acetonitrile supplied capacitance values of 100 F/g at a high operating voltage of 3.4 V. Such a supercapacitor reached a high energy of ∼ 40 Wh/kg, and a good cyclability. © 2005 American Institute of Physics.

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页数：3

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