Title

Improving Pemfc Performance Using Low Equivalent Weight Pfsa Ionomers And Pt-Co/C Catalyst In The Cathode

Abstract

The effects of lower equivalent weight (EW) perfluorosulfonic acid (PFSA) ionomers and Pt-CoC catalyst on the cathode performance of proton exchange membrane fuel cells (PEMFCs) were investigated at two atmospheric pressure operating conditions: low temperature/high relative humidity (RH), 80°C100% RH, and high temperature/low RH, 120°C35% RH. Cell voltage at a current density of 400 mA cm2 was used for the performance comparison. The optimized content in the electrode changed with the ionomer EW, from 32% for 1100 EW Nafion, 28% for 920 EW Nafion to 25% for a developmental PFSA 800 EW ionomer. Compared to 1100 EW Nafion, 800 EW ionomer significantly improved the cell performance by 39 mV at 120°C35% RH; however, at 80°C100% RH, its effect was not apparent. The introduction of Pt-CoC catalyst into the cathode increased the cell performance by 43 mV at 80°C100% RH, which was much higher than a performance improvement at 120°C35% RH. Compared to electrodes made of PtC and Nafion 1100 EW, the combination of 800 EW Ionomer and Pt-CoC catalyst resulted in a 55 mV cell voltage increase at 80°C100% RH and a 48 mV cell voltage increase at 120°C35% RH. © 2006 The Electrochemical Society.

Publication Date

1-19-2007

Publication Title

Journal of the Electrochemical Society

Volume

154

Issue

2

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1149/1.2401059

Socpus ID

33846247139 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33846247139

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