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The computer modeling of active layer cathode of fuel cell with polymer electrolyte: the process of oxygen diffusion in support grain
Abstract
This paper presents a computer simulation study of the active layer cathode of a fuel cell with polymer electrolyte. We simulate both (1) the transport structure of the active layer (which delivers electrons, protons, and oxygen molecules for the realization of the electrochemical oxygen reduction process in any part of the active layer) and (2) the structure of support grains (that is, agglomerates of carbon particles with supported platinum). Our calculations of the volt-ampere characteristics of the active layer take into account ohmic and diffusion limitations (the transport of protons and oxygen) that inevitably arise in support grains. We study two conditions of support grains: (a) with their pores entirely free of water, and (b) with their pores filled with water. The study demonstrates that filling support grains with water leads to a sharp decrease of overall current.
Keywords
катод топливного элемента с полимерным электролитом,
активный слой,
компьютерное моделирование,
учет омических и диффузионных ограничений в зернах подложки,
расчет габаритных токов катода,
cathode of fuel cell with polymer electrolyte,
active layer,
computer simulation,
ohmic and diffusion limitations in support grains,
calculation of cathode overall currents
About the Authors
Yu. G. Chirkov
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, RAS
Russian Federation
Russian Federation
V. I. Rostokin
National Research Nuclear University (MEPhY)
Russian Federation
Russian Federation
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Review
For citations:
Chirkov Yu.G., Rostokin V.I. The computer modeling of active layer cathode of fuel cell with polymer electrolyte: the process of oxygen diffusion in support grain. Alternative Energy and Ecology (ISJAEE). 2014;(6):8-15. (In Russ.)
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