Effect of Membrane Electrode Assembly Fabrication Method on the Single Cell Performances of Polybenzimidazole-Based High Temperature Polymer Electrolyte Membrane Fuel Cells

Title
Effect of Membrane Electrode Assembly Fabrication Method on the Single Cell Performances of Polybenzimidazole-Based High Temperature Polymer Electrolyte Membrane Fuel Cells
Authors
이주연정재우한준영김형준장종현이혜진조은애헨켄스마이어디억김진영유성종홍성안남상용
Keywords
고온 고분자전해질연료전지; Polybenzimidazole; high temperature polymer electrolyte membrane fuel; polytetrafluoroethylene binder
Issue Date
2014-11
Publisher
Macromolecular research
Citation
VOL 22, NO 11, 1214-1220
Abstract
Membrane electrode assemblies (MEAs) for a high temperature polymer electrolyte membrane fuel cell (HTPEMFC) were fabricated using acid-doped polybenzimidazole (PBI) as the electrolyte membrane and polytetrafluoroethylene (PTFE) as the electrode binder. PTFE concentrations of 20, 30, and 45 wt% in the electrode were evaluated to determine the optimal binder content. Additionally, the influence of applying a pressing process during MEA fabrication on the electrode performance was examined. When MEA was prepared without the pressing process, the electrode containing 20 wt% PTFE exhibited the best cell performance (338 mA cm-2 at 0.6 V). However, when MEA was prepared with the pressing process, the electrode containing 45 wt% PTFE exhibited the best cell performance (281 mA cm-2 at 0.6 V). This result is because of the inclusion of the pressing process, as gas permeability is hindered by the transfer of excess phosphoric acid from the electrolyte membrane to the electrodes.
URI
http://pubs.kist.re.kr/handle/201004/48941
ISSN
15985032
Appears in Collections:
KIST Publication > Article
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