High-performance membrane-electrode assembly with an optimal polytetrafluoroethylene content for high-temperature polymer electrolyte membrane fuel cells

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Although high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) have a high carbon monoxide tolerance and allow for efficient water management, their practical applications are limited due to their lower performance than conventional low-temperature PEMFCs. Herein, we present a high-performance membrane-electrode assembly (MEA) with an optimal polytetrafluoroethylene (PTFE) content for HT-PEMFCs. Low or excess PTFE content in the electrode leads to an inefficient electrolyte distribution or severe catalyst agglomeration, respectively, which hinder the formation of triple phase boundaries in the electrodes and result in low performance. MEAs with PTFE content of 20 wt% have an optimal pore structure for the efficient formation of electrolyte/catalyst interfaces and gas channels, which leads to high cell performance of approximately 0.5 A cm(-2) at 0.6 V. (C) 2016 Elsevier B.V. All rights reserved
Publisher
ELSEVIER SCIENCE BV
Issue Date
2016-08
Language
English
Article Type
Article
Keywords

ACID-DOPED POLYBENZIMIDAZOLE; WATER MANAGEMENT; CATALYST LAYER; CARBON-MONOXIDE; IONOMER CONTENT; NAFION CONTENT; IMPURITY IONS; ANODE SIDE; PEMFC; FABRICATION

Citation

JOURNAL OF POWER SOURCES, v.323, pp.142 - 146

ISSN
0378-7753
DOI
10.1016/j.jpowsour.2016.05.042
URI
http://hdl.handle.net/10203/212093
Appears in Collection
MS-Journal Papers(저널논문)
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