Geometrical Optimization of the Composite Cathode in a Solid Oxide Fuel Cell

The optimal cathode inter-layer thickness of a solid oxide fuel cell (SOFC) is an important design parameter to achieve a high performance. The effects of various parameters, such as the SOFC working conditions and the material properties of the cathode, on the optimal cathode inter-layer thickness are systematically investigated through a multi-scale numerical model. And the comprehensive study shows conclusively that a cathode inter-layer thickness in a range of 15-18 μm is sufficiently optimal for all practical material choices and working conditions.