Sahu, A.K. and Selvarani, G. and Bhat, S.D. and Pitchumani, S. and Sridhar, P. and Shukla, A.K. and Narayanan, N. and Banerjee, A. and Chandrakumar, N. (2008) Effect of varying poly(styrene sulfonic acid) content in poly(vinyl alcohol)–poly(styrene sulfonic acid) blend membrane and its ramification in hydrogen–oxygen polymer electrolyte fuel cells. Journal of Membrane Science, 319 (1-2). pp. 298-305. ISSN 0376-7388

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Abstract

Poly(styrene sulfonic acid) (PSSA) content in poly(vinyl alcohol) (PVA) and PSSA blend membrane is varied and its effect on proton conductivity is studied at varying relative humidity (RH) values. The maximum proton conductivity is observed for the PVA–PSSA membrane with about 35 wt. % PSSA at all humidity values. At 30% RH value, the conductivity of PVA–PSSA blend membrane is 1.20×10−3 S/cm, which is about two orders of magnitude higher than the conductivity value of 2.27×10−5 S/cm observed for pristine PVA membrane. Water self-diffusion coefficients and water release kinetics of these materials have been characterized by nuclear magnetic resonance (NMR) imaging technique, which validate the use of this membrane in polymer electrolyte fuel cells (PEFCs). A peak power density of 210mW/cm2 at a load current-density of 500mA/cm2 is achieved for the PEFC with the optimized PVA–PSSA membrane as electrolyte compared to a peak power density of only 38mW/cm2 observed at a load current-density of 80mA/cm2 for the PEFC with pristine PVA membrane as electrolyte while operating at 75 ◦C with H2 and O2 feeds to the fuel cell maintained at atmospheric pressure.

Item Type:	Article
Uncontrolled Keywords:	Proton conductivity; Cross-linked poly(vinyl alcohol) membrane; Poly(styrene sulfonic acid); Hydrogen/oxygen fuel cells
Subjects:	Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	31 Mar 2012 10:40
Last Modified:	31 Mar 2012 10:40
URI:	http://cecri.csircentral.net/id/eprint/347

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