Abstract
The spherical-grain mathematical model is modified and tested against experimental data for single-layer, gas-diffusion electrodes of alkaline fuel cells. The model assumes that the electrode is made of spherical agglomerates of Raney metal and polytetrafluoroethylene (PTFE) that are flooded with electrolyte; the gas occupies the macropores of the electrode. In addition to previous analysis of the diffusion and reaction in the grains, the modified model includes the resistance of gas diffusion into the macropores and a thin electrolyte film surrounding the grain. The original model and the modified model are both compared with experimental polarization data for hydrogen oxidation on an Ni PTFE electrode in alkaline electrolyte. The newly developed model predicts accurately the experimental data in all regions.
| Original language | English |
|---|---|
| Pages (from-to) | 33-39 |
| Number of pages | 7 |
| Journal | Journal of Power Sources |
| Volume | 55 |
| Issue number | 1 |
| DOIs | |
| State | Published - May 1995 |
Bibliographical note
Funding Information:The authors are grateful to the King Abdulaziz City for Science and Technology (KACST) for financial support under the HYSOLAR project. Thanks are also due to the King Fahd University of Petroleum and Minerals for the use of their facilities.
Keywords
- Alkaline fuel cells
- Gas-diffusion electrodes
- Spherical agglomerates
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
