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Substituted phosphonium cation based electrolytes for nonaqueous electrical double-layer capacitors

Published online by Cambridge University Press:  31 January 2011

H. Kurig ,
A. Jänes  and
E. Lust
E. Lust*
Affiliation:
Institute of Chemistry, University of Tartu, 50411 Tartu, Estonia
*
a)Address all correspondence to this author. e-mail: enn.lust@ut.ee
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Abstract

Tetrakis(diethylamino)phosphonium tetrafluoroborate (TDENPBF4), tetrakis(diethylamino)phosphonium hexafluorophosphate (TDENPPF6), and tetrakis(dimethylamino)phosphonium tetrafluoroborate (TDMNPBF4) in acetonitrile (AN) have been studied as electrical double-layer capacitor electrolytes in a two-electrode test cell using titanium carbide derived carbon, C(TiC), as an electrode material. Electrochemical characteristics for C(TiC)|1 M TDENPBF4 + AN, C(TiC)|1 M TDENPPF6 + AN, and C(TiC)|1 M TDMNPBF4 + AN interfaces have been obtained by cyclic voltammetry, constant current charging/discharging, and electrochemical impedance spectroscopy. High-capacitance (85 °F/g) and gravimetric power (269 kW/kg) have been achieved at cell voltage 3.2 V. Data obtained have been compared with results published previously.

Keywords

Energy storageAdsorptionNanostructure
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 8: Materials for Electrical Energy Storage , August 2010 , pp. 1447 - 1450
Copyright
Copyright © Materials Research Society 2010

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