| 摘要 |
Material for cathodes used in molten carbonate fuel cells and procedure for their manufacture. The invention refers to porous nickel cathodes, useable in molten carbonate fuel cells which improve their resistance to corrosion by means of doping the nickel substrate with metal oxides of the lanthanide group, in a percentage of between 0.1 and 10%. Doping consists of the following steps: (a) incorporation of the lanthanide by thoroughly mixing the nickel powder of a size of between 1 and 10μm, with an aqueous solution of a salt of the lanthanide, in which the nickel is dispersed; (b) evaporation, preferably in a vacuum, until dry; (c) heating, in an inert atmosphere, of the dry product up to the decomposition temperature of the hydrate of the lanthanide salt, until the hydration water is eliminated; (d) heating, in an inert atmosphere, up to the decomposition temperature of the lanthanide salt; (e) changing to a reducing atmosphere (preferably an H2/N2 equimolecular atmosphere), maintaining the temperature, for sufficient time to reduce the nickel oxide that may have formed in the previous operations; (f) cooling the product in a reducing atmosphere. The cathodes are obtained by sintering the powder. |
