PEFC 電解質膜中のクロスオーバーガス種輸送特性の解析

抄録

One of the problems in Polymer Electrolyte Fuel Cell (PEFC) is degradation of membrane by hydrogen peroxide produced by reaction of crossover hydrogen and oxygen in membrane phase. Knowing properties of the degradation leads to durable design of PEFC. We evaluated the transport properties of the crossover gas species by using limiting current measurements by platinum microprobes. The parameters of gas flow rate, temperature, relative humidity (RH) and channel length were changed to investigate the impacts of the conditions on the transport properties along gas channel direction. Also, the distributions of water content in membrane were calculated to analyze the influence on the transport properties.