Cathode Supported Honeycomb SOFCs for Intermediate Temperature Operation

Cathode supported honeycomb SOFCs have developed recently for intermediate temperature operation, space saving, and quick start and stop. In this study, the effect of anode length, thickness, and conductivity on the performance of cathode supported honeycomb SOFCs by electrical simulation. In the case of 10mm anode length, to suppress the deviation from the ideal current (current loss) under 10%, the anode thickness needs to be 20 µm. And, honeycomb SOFCs with different anode thickness could be prepared by lowering the heat treatment temperature before forming anode layer. Electrochemical evaluations for honeycomb SOFCs with the anode thickness of 4.6 or 10.2 µm were conducted. The performance of honeycomb with 10.2 µm thick anode was twice as good as that with 4.6 µm thick anode. The activation and gas diffusion polarization were decreased.