Hydrogel membrane electrolyte for electrochemical capacitors

Sampath, S and Choudhury, NA and Shukla, AK (2009) Hydrogel membrane electrolyte for electrochemical capacitors. In: Proceedings of the Indian Academy of Sciences - Chemical Sciences, 121 (5). pp. 727-734.

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Abstract

Polymer electrolytes are known to possess excellent physicochemical properties that are very useful for electrochemical energy systems. The mobility in polymer electrolytes is understood to be mainly due to the segmental motion of polymer chains and the ion transport is generally restricted to the amorphous phase of the polymer. Gel polymer electrolytes (GPE) that are formed using plastizicers and polymers along with ionic salts are known to exhibit liquid-like ionic conductivity while maintaining the dimensional stability of a solid matrix. In the present study, the preparation and characterization of poly(vinyl alcohol)-based hydrogel membranes (PHMEs) as electrolyte for electrochemical capacitors have been reported. VaryingHClO4 dopant concentration leads to different characteristics of the capacitors. The EC comprising PHME doped with 2 M HClO4 and black pearl carbon (BPC) electrodes has been found to exhibit a maximum specific capacitance value of 97 F g(-1), a phase angle value of 78A degrees, and a maximum charge-discharge coulombic efficiency of 88%.

Item Type:	Journal Article
Publication:	Proceedings of the Indian Academy of Sciences - Chemical Sciences
Publisher:	Indian Academy of Sciences
Additional Information:	copyright of this article belongs to Indian Academy of Sciences.
Keywords:	Gel polymer electrolyte;hydrogel;supercapacitor; voltammetry;charge-discharge capacitance.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	13 Jan 2010 08:21
Last Modified:	19 Sep 2010 05:53
URI:	http://eprints.iisc.ac.in/id/eprint/25151

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