Electrolyte structure with strontium titanate matrix for molten carbonate fuel cells

Claim 1

An improved molten carbonate fuel cell electrolyte structure consisting essentially of, based on the total weight of the electrolyte structure, from about 55% by weight to about 75% by weight of strontium titanate and about 25% by weight to about 45% by weight of alkali metal carbonate electrolyte, said strontium titanate having a crystallite morphology which is at least significantly spherical and which has an average size ranging from about 0.1 micron to about 1 micron, said strontium titanate being selected from the group consisting of stoichiometric strontium titanate, strontium-rich titanate and mixtures thereof, said alkali carbonate being selected from the group consisting of a ternary lithium-potassium-sodium carbonates composition, a binary lithium-potassium carbonates composition, a binary lithium-sodium carbonates composition, a binary sodium-potassium carbonates composition and mixtures thereof, said electrolyte structure being at least substantially pore-free when said electrolyte is in molten form.