▎ 摘　　要

NOVELTY - Manufacture of cathode active material involves mixing graphene oxide and transition metal precursor in solvent, adding sodium precursor, preparing sodium-containing transition metal composite oxide, removing solvent from resultant mixture, and heat-treating. USE - Manufacture of cathode active material used for sodium secondary battery cathode (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for sodium secondary battery cathode.