Development of New-type Matrix for Internal-manifold MCFC

Abstract

The MCFC matrix has a unique structure in order to maintain homogeneous distribution of molten carbonate melt. It is composed of an electronically insulation material which is stable in molten carbonate melt. Specially, in case of internal-manifold MCFC stack, the sealing on wet-seal side is the most important role and the matrix in internal-manifold stack should be completely flooded by the melt. In this study, we prepared the matrix using nano-sized LiAlO2 powder obtained by ultrasonic spraying heating method. The pore size distribution of the matrix was narrower than that of commercial matrix made of micro-sized powder and the pore size is also smaller than it. The performance of single cell showed that the mean voltage was 0.85 V at 150 mA/cm2 for 600 hours.