OS5-9 気液二相流挙動が固体高分子形水電解セルの性能に及ぼす影響の実験的解明(OS5 水素・燃料電池,循環型社会における動力エネルギー技術)

概要

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Polymer electrolyte electrolysis cell (PEEL) performance is degraded by the local accumulation of gas bubble and by the shortage of water in the channel and/or porous electrode. In this study, we fabricated a visualization cell, and observed the two-phase flow behavior in the anode channel and measured the differential pressure with changing operation parameter such as load current, and with changing how to place the cell. In the case of vertically placed cell, the differential pressure had a maximum at 0.1A/cm^2, and then decreased with increasing the load current. On the other hand, the differential pressure in the case of horizontally placed cell monotonously decreased with increasing the load current. For any given operation condition the cell kept the steady state accompanying with small perturbation. However, the cell voltage and differential pressure indicated large fluctuation occasionally.
2007-06-13