DEVELOPMENT OF MOLTEN-CARBONATE FUEL-CELL USING NOVEL CATHODE MATERIAL

The slow dissolution of lithiated-NiO cathodes in molten carbonates is the main obstacle for the commercialization of molten carbonate fuel cells. The aim of the present work was to investigate the possibility of producing an electrode based on LiCoO2. The LixCoO2 powder samples (0.8 < x < 1.1) were obtained by thermal decomposition of carbonate, a cetate and oxide precursors, in air. The syntheses were monitored by t hermal analysis (TGA, DTA). The calcined and sintered powder samples w ere characterized by X-ray diffraction and atomic absorption spectrosc opy The porous electrodes were prepared with different pore-formers by cold pressing and sintering. A bi-modal pore size distribution was ob served in all the materials. Conductivity measurements were carried ou t in the temperature range 500-700 degrees C. The solubility in molten carbonates was measured. To test the cathodic performance of the mate rials under study, electrochemical impedance spectroscopy measurements were carried out to investigate the porous electrode/molten carbonate interface. Copyright (C) 1996 International Association for Hydrogen Energy.