ANODE ACTIVE MATERIAL, ITS PRODUCING PROCESS, AND LITHIUM ION SECONDARY CELL USING THE ANODE ACTIVE MATERIAL

摘要

A process of preparation capable of easily preparing cathode materials having a homogeneous composition in a good mass productivity, a cathode material obtained by this process, and a secondary lithium ion battery using the cathode material. Aqueous solutions of each of lithium nitrate, cobalt nitrate and tartaric acid are prepared and mixed in a stoichiometric ratio of a cathode material, and therefrom water is removed by spray-drying to give a precursor which is then sintered. High performance secondary lithium ion batteries are obtained by using the obtained cathode material in the positive electrode.