Provided are: a composite metal oxide with which it is possible to improve the performances of a sodium secondary battery; a process for producing the composite metal oxide; a positive active material which comprises the composite metal oxide; a positive e...

Provided is a high-capacity positive electrode active material, and more particularly, a high-capacity positive electrode active material for a lithium secondary battery containing a composite oxide of the following Chemical Formula 1. €ƒ€ƒ€ƒ€ƒ...