Cathode material for a high-temperature fuel cell (sofc) and a cathode that can be produced therefrom

摘要

The invention relates to a cathode material, particularly for use in a high-temperature fuel cell, comprising substoichiometric Ln_1-x-yM_yFe_1-zC_zO_3-δ, with 0.02≦×x≦0.05, 0.1≦y≦0.6, 0.1≦z≦0.3, 0≦δ≦0.25 and with Ln=lanthanides, M=strontium or calcium and C=cobalt or copper. By using a particular production method, in which this cathode material having a specified grain size is used, and in which a (Ce, Gd)O_2-δ-intermediate layer is advantageously formed between the cathode and electrolyte, a cathode is obtained that, when used in a high-temperature fuel cell, can achieve a power greater than 1 W/cm² already at 750° C. and a cell voltage of 0.7 V.