Microporous layer based on SiC for high temperature proton exchange membrane fuel cells

Reference

DOI:

10.1016/j.jpowsour.2015.04.102

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Article history

Received 21 January 2015,

Revised 25 March 2015,

Accepted 16 April 2015,

Available online 25 April 2015,

Published in print 15 August 2015

Abstract

This work reports the evaluation of Silicon Carbide (SiC) for its application in microporous layers (MPL) of HT-PEMFC electrodes and compares results with those obtained using conventional MPL based on Vulcan XC72. Influence of the support load on the MPL prepared with SiC was evaluated, and the MPL were characterized by XRD, Hg porosimetry and cyclic voltammetries. In addition, a short lifetest was carried out to evaluate performance in accelerated stress conditions. Results demonstrate that SiC is a promising alternative to carbonaceous materials because of its higher electrochemical and thermal stability and the positive effect on mass transfer associated to its different pore size distribution. Ohmic resistance is the most significant challenge to be overcome in further studies.

Keywords

High temperature PEMFC, microporous layer, electrode