CATHODE ACTIVE MATERIAL AND SECONDARY BATTERY USING SAME

摘要

The present invention relates to a cathode active material that can occlude and emit ions, and provides a cathode active material and a secondary battery comprising the cathode active material, the cathode active material comprising: a core having a crystalline carbon based material; and a composite coating layer having at least one material selected from the group consisting of low crystalline carbon and amorphous carbon, and a hydrophilic material including an oxide that can occlude and emit ions, wherein the composite coating has a configuration of a matrix made of at least one material selected from the group consisting of low crystalline carbon and amorphous carbon, and an ingredient selected from hydrophilic materials including oxides that can occlude and emit ions, and a filler made of the remaining ingredients.