イオンビーム二段階加工による PEFC 触媒層内アイオノマー分布解析

抄録

Polymer electrolyte fuel cell (PEFC) performance highly depends on proton conduction and oxygen transport in Catalyst layer (CL). Ionomer is one of the most important ingredients in CL of PEFC. Therefore, we need to develop a novel method to investigate ionomer distribution in CL. In this paper, we proposed a two-stage ion-beam processing method combined with ion milling and FIB processing for preferentially removing ionomer in CL. Applying this technique to the CL, we succeeded in visualization of ionomer distribution in CL.