High-capacity lithium cobalt oxide-base lithium ion battery anode material and preparation method thereof

The invention discloses a high-capacity lithium cobalt oxide-base lithium ion battery anode material. The material is a lithium cobalt oxide finished product which is obtained by mixing modified lithium cobalt oxide in different granularities and coating the lithium cobalt oxide, the anode material contains a cobalt-source substance, a lithium-source substance, a doping agent and a coating material, wherein the molar ratio of Li to Co is 0.95 to 1.2, the doping quantity of the doping agent is 0.01 to 10 percent by weight, and the doping quantity of the coating material is 0.01 to 20 percent by weight. The capacity of the lithium cobalt oxide material is improved by mixing the lithium cobalt oxide in different granularities, the stability, safety and electrochemical property of the material under the high voltage condition of more than 4.2V are improved through doping and coating, and the high-temperature circulating property is improved.