CATHODE FOR USE AT HIGH TEMPERATURES

摘要

Disclosed is a cathode for use at high temperatures, which consists of an oxidic material that has an electric conductivity of more than 10 S at 700 to 1000 DEG C and is provided with a K2NiF4 layer structure, in which at least one perovskite layer borders another layer that does not have a perovskite structure. Said layer structure has the advantageous effect of providing said material with sufficient electric conductivity and a good electrocatalytic activity already at temperatures below 800 DEG C as opposed to previously known oxides. The oxidic material also has the advantage of showing good thermodynamic stability and an adequate thermal expansion behavior towards electrolytes that are used in said temperature range. Said oxidic material is therefore particularly suitable for the production of cathodes in a high-temperature fuel cell.