The Effect of Heteropoly Acids on Stability of PFSA PEMs under Fuel Cell Operation

Electrochem. Solid-State Lett., Volume 10, Issue 3, pp. B51-B55 (2007)

(Published 27 December 2006)

Content Alerts/

You are not logged in. Log in

ABSTRACT

REFERENCES (20)

CITING ARTICLES

Gregory M. Haugen,¹ Fanqin Meng,² Niccolo V. Aieta,² James L. Horan,⁴ Mei-Chen Kuo,² Matthew H. Frey,³ Steven J. Hamrock,¹ and Andrew M. Herring²
¹3M Company, 3M Fuel Cell Components Program,
²Department of Chemical Engineering, and
³3M Corporate Research Materials Laboratory, St. Paul, Minnesota 55144, USA
⁴Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado 80401, USA

Membraneswere cast from mixtures of the 3M perfluorinated sulfonic acidionomer [side chain -O–(CF₂)₄–SO₃H] and various heteropoly acids (HPAs) ata 10 or 20 wt % doping level. Membrane electrode assemblies (MEAs)fabricated from these membranes were subjected to a fuel celltesting protocol from 70 to 100°C under relatively dry conditions,dew point of 70°C, to avoid leaching of the HPA.The most significant finding was that the more stable HPAs,H₄SiW₁₂O₄₀, alpha

-H₃P₂W₁₈O₆₂, and H₆P₂W₂₁O₇₁, reduce the rate of F⁻ byover half and improve the power of the MEA by9% under these conditions.

©2006 The Electrochemical Society