Ma. Alsaleh et A. Gultekin S",sleemurrahman,"alzakri, MODIFIED FLOODED SPHERICAL AGGLOMERATE MODEL FOR GAS-DIFFUSION ELECTRODES IN ALKALINE FUEL-CELLS, Journal of power sources, 55(1), 1995, pp. 33-39
The spherical-grain mathematical model is modified and tested against
experimental data for single-layer, gas-diffusion electrodes of alkali
ne fuel cells. The model assumes that the electrode is made of spheric
al 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 react
ion in the grains, the modified model includes the resistance of gas d
iffusion into the macropores and a thin electrolyte film surrounding t
he grain. The original model and the modified model are both compared
with experimental polarization data for hydrogen oxidation on an Ni/PT
FE electrode in alkaline electrolyte. The newly developed model predic
ts accurately the experimental data in all regions.