Chemically Stable Proton Conducting Doped BaCeO3

摘要

Solid electrolytes, anodes and cathodes for SOFC. Doped BaCeO₃ useful for solid electrolytes and anodes in SOFCs exhibiting chemical stability in the presence of CO₂, water vapor or both and exhibiting proton conductivity sufficiently high for practical application. Proton-conducting metal oxides of formula Ba_1−xSr_xCe_{1−y1−y2−y3}Zr_y1Gd_y2Y_y3O_3−δ where x, y1, y2, and y3 are numbers as follows: x is 0.4 to 0.6; y1 is 0.1-0.5; y2 is 0.05 to 0.15, y3 is 0.05 to 0.15, and cathode materials of formula II GdPrBaCo_2−zFe_zO_5+δ where z is a number from 0 to 1, and δ is a number that varies such that the metal oxide compositions are charge neutral. Anodes, cathodes and solid electrolyte containing such materials. SOFC containing anodes, cathodes and solid electrolyte containing such materials.