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Dependence of the performance of a high-temperature polymer electrolyte fuel cell on phosphoric acid-doped polybenzimidazole ionomer content in cathode catalyst layer

Cited 63 time in Web of Science Cited 64 time in Scopus
Authors
Kim, Jeong-Hi; Kim, Hyoung-Juhn; Lim, Tae-Hoon; Lee, Ho-In
Issue Date
2007
Publisher
Elsevier
Citation
Journal of Power Sources 170 (2007) 275–280
Keywords
High-temperature polymer electrolyte fuel cellIonomer contentMembrane electrolyte assemblyPhosphoric acid-doped polybenzimidazoleCathode catalystPotential loss
Abstract
Phosphoric acid-doped polybenzimidazole is used as a fuel cell membrane and an ionomer in the catalyst layer of a high-temperature polymer
electrolyte fuel cell. Single-cell tests are performed to find the optimum ionomer content in the cathode catalyst layer. To determine the effects
of the ionomer in the catalyst layer, the potential loss in the cell is separated into activation, ohmic and concentration losses. Each of these losses
is examined by means of impedance and morphological analyses. With the weight ratio of ionomer to Pt/C of 1:4 (20 wt.% ionomer in catalyst
layer), the fuel cell shows the lowest ohmic resistance. The activation loss in the fuel cell is lowest when the ratio is 1:9 (10 wt.% ionomer in the
catalyst layer). The cell performance is dependent on this ratio, and the best cell performance is obtained with a ratio of 1:4.
ISSN
0378-7753
Language
English
URI
https://hdl.handle.net/10371/61300
DOI
https://doi.org/10.1016/j.jpowsour.2007.03.082
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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