3. The method for producing a transferred-metal composite oxide according to claim 1,
in the steps 1 to 4, the aqueous solution of the metal salt for forming the inside of the 1 st compartment, the chelating agent, and the aqueous alkali solution are mixed in the reactor so that the particle size distribution of the particles formed after the reaction for 30 minutes has D50 of 4um or less.
the particles
D50
4um
um