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Fuel Cell Comprising Solid Oxide Electrolyte Membrane


Stanford researchers have patented a new method for preparing an improved solid oxide fuel cell (SOFC) and its membrane electrode assembly using a proton conducting solid perovskite electrolyte containing nano and micro grains of yttrium-doped barium zirconate. This method of preparing a fuel cell improves the ion conductivity of an electrolyte membrane at a low temperature and a membrane electrode assembly of a solid oxide fuel cell prepared by the method can improve ion conductivity at a low temperature. The proton conducting solid perovskite electrolyte membrane comprises yttrium-doped barium zirconate (BYZ) and the buffer layer comprises MgO or SrTiO3. The solid oxide electrolyte forms a granular structure which has nano- to micro-meter grain size according to the processing conditions. Ion conductivity in grain boundaries is far less than that in bulk particles.Technology Applications: (1) Solid oxide fuel cell fabrication (2) Membrane electrod assembly for next generation protonic devices including hydrogen fueled fuel cells methanol or ethanol fueled fuel cells hydrogen transport membranes for separation and purification hydrogen gas sensors Stage of Research: The inventors performed laboratory scale test cells and published the results and cell characteristics.


(1) High proton conductivity (2) Improved low temperature ion conductivity - enables preparation of many useful fuel cells (3) High grain boundary density

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