COMPOSITE PARTICLE POWDER, ELECTRODE MATERIAL FOR SOLID OXIDE CELLS, AND ELECTRODE FOR SOLID OXIDE CELLS USING SAME

摘要

A composite particle powder comprises an electron-conducting material and an ion-conducting material that are agglomerated together; the composite particle powder having a volume-based 50% particle diameter (D50) of 0.1 to 2.0 µm in particle size distribution measurement, a volume-based D75/D25 of 1.1 to 2.2 in particle size distribution measurement, D50 and a BET specific surface that satisfy the following: (I) in the case of 0.1 µm ≤ D50 ≤ 0.5 µm, larger than 20 m/g and 200 m/g or less; (II) in the case of 0.5 µm D50 ≤ 0.9 µm, larger than 4 m/g and 50 m/g or less; (III) in the case of 0.9 µm D50 ≤ 1.3 µm, larger than 2.5 m/g and 30 m/g or less; and (IV) in the case of 1.3 µm D50 ≤ 2.0 µm, larger than 2 m/g and 20 m/g or less; and an ion-conducting material content of 35 to 75 mass%.According to the present invention, an electrode having a low electrode resistance can be provided using an oxide or a metal as a raw material.