Polarization Properties of an Intermediate Temperature Operated Ceramic Reactor in Power Generating Mode

Abstract

It is known that a small tubular design enables SOFCs to have high thermal shock resistance and rapid startability. In this study, we fabricated anode-supported micro-tubular SOFCs which were introduced a Sc-doped ZrO2 electrolyte. The cell dimensions were 1.8 mm in diameter and 500 mm in length. And the cell configuration was (La,Sr) (Fe,Co)O3 - Gd doped CeO2 (CGO) cathode /CGO buffer layer /Sc-doped ZrO2 electrolyte (ScSZ) / Ni-ScSZ anode. The power generating test and the polarization measurement of this micro tubular cell have done at 650oC. The maximum power density of this cell was ca. 0.7Wcm-2 (2.6Acm-2, 0.26V) at 650oC, and the polarization resistance was higher than the ohmic resistance.