G112 SOFC燃料極の組成比が有効三相界面分布と電極性能におよぼす影響(一般講演(1))

Abstract

Composition ratio of Ni and YSZ is a primary control parameter to optimize the microstructure of Ni-YSZ cermet anode of Solid Oxide Fuel Cells (SOFCs). In this study, the performance of Ni-YSZ cermet anodes with three different composition ratio, Ni:YSZ = 70:30, 50:50 and 30:70 are experimentally investigated. The 3D microstructure of the tested anodes is directly observed by focused ion beam and scanning electron microscope (FIB-SEM). From the microstructural analysis, Ni:YSZ = 30:70 anode has no active three-phase boundary around anode-electrolyte interface because of the poor Ni connectivity, which results in higher ohmic resistance of the anode.