CATHODE FOR ELECTROCHEMICAL CELL

摘要

PURPOSE:To obtain a cathode for an electrochemical cell with decreased cell resistance by coating Y2O3-stabilized ZrO2 with a porous electrode material comprising fine particles and coarse particles of transition metal oxide and Y2O3-stabilized ZrO2 or MgAl2O4. CONSTITUTION:A cathode material having a two-layer structure is formed on Y2O3-stabilized ZrO2 which is an oxygen ion conductive solid electrolyte. The first layer which is directly in contact with the solid electrolyte of the cathode material is a porous electrolyte material comprising oxide fine particles. The second layer on the first layer is a porous electrode material comprising an oxide coarse particle material having a larger particle size than the particles in the first layer. Further, both of the porous electrode materials above described are a mixture of transition metal oxides and Y2O3-stabilized ZrO2 or MgAl2O4. Thereby, a high-performance cathode for an electrochemical cell is obtd.