Cathode active material, cathode mixture, battery, and method for producing cathode active material

Abstract

A main object of the present disclosure is to provide a cathode active material of which resistance is reduced. The present disclosure achieves the object by providing a cathode active material including: a crystalline primary particle containing Li, TM, which is a transition metal, and O, wherein the cathode active material is an aggregate configured by a plurality of the primary particle; in a pore diameter distribution obtained by a mercury press-in method, a peak is present in a range of 20 nm or more and 300 nm or less; and when Dave designates an average particle size of the aggregate, d10 designates 10% accumulation particle size of the primary particle, d50 designates 50% accumulation particle size of the primary particle, and d90 designates 90% accumulation particle size of the primary particle, the cathode active material satisfies 0.075≤d50/Dave≤1, and 0.4≤(d90−d10)/d50≤4.0.

Dependencies are inferred from the claim text.