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Journal of Porous Media
Fator do impacto: 1.752 FI de cinco anos: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

Volumes:
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Journal of Porous Media

DOI: 10.1615/JPorMedia.v10.i8.10
pages 739-750

The Effect of Capillary Forces in a Porous Electrode on Output Current Voltage Characteristics of Fuel Cell with Polymer Proton Exchange Membrane

V. E. Nakoryakov
S. S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Pr. Ac. Lavrentev, 1, Novosibirsk, 630090, Russia
Vladimir G. Gasenko
Institute for Advanced Studies, 630090 Novosibirsk, Russia

RESUMO

A mathematical isothermal model of a polymer proton exchange membrane fuel cell (PEMFC) cathode accounting for the capillary forces is derived and discussed. On the basis of analytical and numerical calculations, it is shown that capillary forces have a principal effect on the operating voltage drop due to a thin water film arising in wet-proofed pores under certain conditions and thus presenting the burden barrier for oxygen diffusion as compared with ordinary oxygen diffusion in a gas mixture. The calculations made are in good accordance with known experimental data.


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