Recent Development of Electrolyte Supported Cells with High Power Density

Development and progress in manufacturing of high power density electrolyte supported cell is presented. Two parallel directions to increase electrochemical performance of cells are discussed. Firstly, the electrolyte supported cells with improved cathode based on strontium doped lanthanum manganite with additional transition metal on B-place, La1-xSrxMn1-yM'yO(3-delta) (LSMM') and the multilayer anode based on Ni/8YSZ cermets are prepared and characterized. The second direction represents the electrolyte supported cells with improved cathode and multilayer anode based on Ni/GDC cermet. Both types of cells have significantly modified and improved electrodes microstructures, which have been achieved using advanced paste manufacturing technology. The maximum power density increases from 529 mW/cm(2) for commercial cell (Fa. Kerafol) up to 973 mW/cm(2) for novel IKTS cell at 0.7 V at 860 degrees C and is comparable with the performance of anode-supported SOFC cells. The changes in polarization resistance of tested cells under different conditions are discussed on the basis of analysis of impedance spectra.