自然給気型燃料電池のカソードセパレータ構造に対する性能特性(熱工学,内燃機関,動力など)

概要

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The performance of free-breathing polymer electrolyte membrane fuel cell (PEMFC) was studied experimentally and the effect of cathode separator structure on the cell performance was investigated. Two types of cathode separators were used for the cell with 18cm^2 active area: the open type had parallel rectangular open-slits and the cannel type had straight vertical channels with their ends open. The polarization curve, the cell impedance and the contact pressure distribution of the separator were measured for each type. It was clarified that realizing uniform contact pressure of the cell layers is difficult for the open type separator, which causes higher contact resistance and lower cell performance. On the other hand, the channel type separator can keep low contact resistance, and the cell performance is strongly affected by the natural convection inside the channel. It was found that the channel type separator can achieve high performance by optimization of channel design and this type is suitable for the free-breathig PEMFC. A computational three dimensional analysis was performed for the free-breathing cannel type PEMFC with the different channel depths, and it identified the influece of natural convection.
一般社団法人日本機械学会の論文
2005-11-25