Effect of Membrane Electrode Assembly Fabrication Method on the Single Cell Performances of Polybenzimidazole-Based High Temperature Polymer Electrolyte Membrane Fuel Cells
- Authors
- Lee, JuYeon; Jung, Jeawoo; Han, Jun Young; Kim, Hyoung-Juhn; Jang, Jong Hyun; Lee, Hye-Jin; Cho, Eun Ae; Henkensmeier, Dirk; Kim, Jin Young; Yoo, Sung Jong; Hong, Seong-Ahn; Nam, Sang Yong
- Issue Date
- 2014-11
- Publisher
- 한국고분자학회
- Citation
- Macromolecular Research, v.22, no.11, pp.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.
- Keywords
- GAS-DIFFUSION ELECTRODES; ACID; high temperature polymer electrolyte membrane fuel cell; polybenzimidazole; polytetrafluoroethylene binder
- ISSN
- 1598-5032
- URI
- https://pubs.kist.re.kr/handle/201004/126211
- DOI
- 10.1007/s13233-014-2167-x
- Appears in Collections:
- KIST Article > 2014
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