G201 固体高分子形燃料電池内の凝縮水分布に及ぼすMPLの影響(OS5 水素・燃料電池)

概要

論文の詳細を見る
Micro Porous Layer (MPL) play an important role in the water management of PEFC, but details of the mechanism to suppress water flooding has not been fully understood. In this study, we investigated condensed water distribution at the interface between MPL and MEA to clarify the effect of MPL on discharge of produced water. Freezing method was applied to observe the distribution of the condensed water, and the distribution on the MEA surface was quantified by a binary image processing. The results indicated less amount of condensed water distribution on the MEA surface in the case of GDL with MPL than in the case of GDL without MPL. Next, comparing normal operation with start-up temperature -10℃, there is large amount of condensed water on the MEA surface after operation at -10℃. Based on these results, the MPL has a role to prevent accumulated water on the surface of MEA, and suppresses water flooding. In operation at -10℃, generated water which becomes supercooled water freezes at the interface between MEA and MPL, and large ice agglomerates are generated on the surface of MEA.
一般社団法人日本機械学会の論文
2011-06-22