P14-10 PEFC 用マイクロチャンネル型薄型セパレータの特性 : 凝縮水の生成と電池性能への影響

概要

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The fuel cell is developed as a power source which is friendly with the enviromennt. To thin the fuel cell is useful to compactness and cost reduction. So, in this study, the fuell cell with thin separators of 0.6mm thickness including microchannels of 0.2mm was fabricated and experimented. Experimental results showed that the hydrophobic treatment of separators is indispensable to drain easily water condensed in the microchannels. Besides, as water produced at the cathode increases with current densities and fills some microchannels and the electrode pores the pressure loss at the cathode gas increases and the performance of the fuel cell decreases due to the reduction of gas diffusivity. However if the humidity of cathode inlet gas is controlled to vapour produced water corresponding to current densities the thin separator with microchannels of 0.2mm thick could be used without any influence on the performance.
一般社団法人日本機械学会の論文
2002-06-14