SOLID ELECTROLYTIC FUEL CELL IMPROVED IN CURRENT COLLECTING EFFICIENCY OF AIR ELECTRODE

摘要

PURPOSE: To improve the output density of a fuel cell by using an air electrode of two-layer structure consisting of a sintered body of two kinds of La(Sr)MnO2 differed in Sr concentration and opposing it to a solid electrolytic layer and a separator. CONSTITUTION: An air electrode is put on a solid electrolytic layer YSZ. The air electrode is formed of a sintered body of sintered La0.85 Sr0.15 MnO3 and La0.6 Sr0.4 MnO3 . The La0.85 Sr0.15 MnO3 of the air electrode is opposed to the solid electrolyte YSZ. The La0.6 Sr0.4 MnO3 of the air electrode is excellent in conductivity. Since the La0.6 Sr0.4 MnO3 excellent in conductivity is opposed to the separator, the current collecting property of the separator is improved.