Title

Investigation Of Membrane Property And Fuel Cell Behavior With Sulfonated Poly(Ether Ether Ketone) Electrolyte: Temperature And Relative Humidity Effects

Keywords

Fuel cell performance; Proton conductivity; Relative humidity; Sulfonated poly(ether ether ketone) (SPEEK); Temperature; Water vapor uptake

Abstract

Sulfonated poly(ether ether ketone)s (SPEEKs) with various sulfonation degrees were prepared and characterized for the intention of fuel cell applications. Two distinct water vapor activity regions characterized by different water vapor uptake behaviors were observed. Proton conductivity of SPEEK membranes increases with increasing sulfonation degrees and temperatures. SPEEK membranes with sulfonation degrees of 51 and 60% show proton conductivity higher than 0.01 S cm-1 at temperatures higher than 40 °C with 100% relative humidity (RH). Relative humidity has a stronger effect on the proton conductivity of SPEEK membranes than that of Nafion® membranes. Fuel cell performance with SPEEK membranes was studied at various temperatures and relative humidities. Good fuel cell performance was obtained with a SPEEK-51 membrane at 80 °C, 100% relative humidity and ambient pressure. Both temperature and relative humidity have important influence to the cell resistances and performances. Cyclic voltammetry (CV) as well as hydrogen crossover profiles show distinct features under different relative humidity conditions. © 2005 Elsevier B.V. All rights reserved.

Publication Date

10-4-2005

Publication Title

Journal of Power Sources

Volume

150

Issue

1-2

Number of Pages

120-128

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jpowsour.2005.03.180

Socpus ID

24944457251 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/24944457251

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