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Cross-Linked Polymer Hydrogel Electrolytes for Electrochemical Capacitors

Choudhury, N A and Shukla, AK and Sampath, S and Pitchumanic, S (2006) Cross-Linked Polymer Hydrogel Electrolytes for Electrochemical Capacitors. In: Journal Of The Electrochemical Society, 153 (3). A614-A620.

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Abstract

Acidic polyvinyl alcohol/polyacrylic acid blend hydrogel electrolytes (BHEs) were prepared by cross-linking with glutaraldehyde and perchloric acid. These acidic BHEs were treated suitably to realize alkaline and neutral BHEs. Amorphicity of BHEs was followed by differential scanning calorimetry. Ionic conduction in acidic BHEs was found to take place by a Grotthus-type mechanism whereas in alkaline and neutral BHEs it was due to a segmental motion mechanism. Ionic conductivity of BHEs was found to range between 10(-3) and 10(-2) S cm(-1). Electrochemical capacitors assembled with acidic polyvinyl alcoholhydrogel electrolyte yielded a maximum capacitance of similar to 60 and 1000 F g(-1) with BP carbon and RuO(x)center dot xH(2)O/C electrodes, respectively.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Electrochemical Society Inc.
Keywords: polymer electrolytes, polymer gels, polymer blends, electrolytic capacitors, amorphous state, differential scanning calorimetry, ionic conductivity.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 16 Mar 2009 09:42
Last Modified: 19 Sep 2010 04:54
URI: http://eprints.iisc.ernet.in/id/eprint/17023

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