Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7721791 | International Journal of Hydrogen Energy | 2013 | 9 Pages |
Abstract
Gas diffusion electrodes (GDEs) prepared with various polymer binders in their catalyst layers (CLs) were investigated to optimize the performance of phosphoric acid doped polybenzimidazole (PBI)-based high temperature proton exchange membrane fuel cells (HT-PEMFCs). The properties of these binders in the CLs were evaluated by structure characterization, electrochemical analysis, single cell polarization and durability test. The results showed that polytetrafluoroethylene (PTFE) and polyvinylidene difluoride (PVDF) are more attractive as CL binders than conventional PBI or Nafion binder. At ambient pressure and 160 °C, the maximum power density can reach â¼ 0.61 W cmâ2 (PTFE GDE), and the current density at 0.6 V is up to ca. 0.52 A cmâ2 (PVDF GDE), with H2/air and a platinum loading of 0.5 mg cmâ2 on these electrodes. Also, both GDEs showed good stability for fuel cell operation in a short term durability test.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Huaneng Su, Sivakumar Pasupathi, Bernard Bladergroen, Vladimir Linkov, Bruno G. Pollet,