Room-temperature phosphonium ionic liquids for supercapacitor application
Room-temperature phosphonium ionic liquids for supercapacitor application
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DOI：
10.1063/1.1906320
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发表时间：
2005-04-18
影响因子：
4
通讯作者：
Pernak, J
中科院分区：
文献类型：
--
作者：
Frackowiak, E;Lota, G;Pernak, J
离子液体（IL）已被用作超级电容器的电解质。两种鳞盐，如三己基（十四烷基）。已经选择双（三氟甲基磺酰基）酰亚胺（IL 1）和三己基（十四烷基）二氰胺（IL 2）用于该目标。为了降低IL的粘度，加入少量乙腈（5至25重量%）。基于活性炭（AC）作为电极和具有25wt%乙腈的IL 1的超级电容器在3.4V的高工作电压下提供100 F/g的电容值。这样的超级电容器达到了1040 Wh/kg的高能量，并且具有良好的循环能力。© 2005美国物理学会。
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.