T0502-3-4 固体高分子形燃料電池の積層界面におけるプロトン移動の理論モデル(マイクロ・ナノ領域におけるバイオ・熱流体の融合学術創成(3))

概要

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In the present study, we develop a novel model to discuss the relationship between proton transfer and overpotential in polymer electrolyte fuel cells (PEFCs) from the microscopic viewpoint. It is known that the overpotential is partly caused by the proton transfer via gas diffusion layers, electrodes, electrolyte membranes, and those interfaces. In our model, protons which are in the statistical ensemble move each layer getting across the interfaces. Here, potential barriers at the interfaces between electrodes and electrolyte membranes are assumed to disturb the flow of protons. Under the condition of constant current density, the energy dissipation process is considered, where accelerated protons collide with the surroundings, reduce their momenta, and then reach their stationary state. Consequently, the result from our theoretical model well explains the ohmic overpotential and concentration overpotential observed in PEFCs.
一般社団法人日本機械学会の論文
2009-09-12