Patent ID: 8748038

Claim:
A cathode active material, comprising: a lithium-containing metal oxide; and an acrylate or methacrylate organic material including an alkyleneglycol unit; wherein: the acrylate or methacrylate organic material including the alkyleneglycol unit is represented by Formula 1 below: in Formula 1: R 1 is a hydrogen atom or a methyl group, R 2 is a hydrogen atom, a C 1 -C 20 alkyl group, or a C 6 -C 30 aryl group, R 3 is a hydrogen atom, a C 1 -C 20 alkyl group, a C 6 -C 30 aryl group, a methacrylate group, or an acrylate group, m is an integer of 1 to about 30, and n is an integer of 1 to about 100,000, the acrylate or methacrylate organic material including the alkyleneglycol unit includes poly(ethyleneglycol) methyl ether methacrylate; and the acrylate or methacrylate organic material including the alkyleneglycol unit is mixed with and coated directly on the entire surface of the lithium-containing metal oxide.