Effect of Membrane Electrode Assembly Fabrication Method on the Single Cell Performances of Polybenzimidazole-Based High Temperature Polymer Electrolyte Membrane Fuel Cells
- Effect of Membrane Electrode Assembly Fabrication Method on the Single Cell Performances of Polybenzimidazole-Based High Temperature Polymer Electrolyte Membrane Fuel Cells
- 이주연; 정재우; 한준영; 김형준; 장종현; 이혜진; 조은애; 헨켄스마이어디억; 김진영; 유성종; 홍성안; 남상용
- 고온 고분자전해질연료전지; Polybenzimidazole; high temperature polymer electrolyte membrane fuel; polytetrafluoroethylene
- Issue Date
- Macromolecular research
- VOL 22, NO 11, 1214-1220
- 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.
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