POSITIVE ELECTRODE MATERIAL, AND POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY WHICH INCLUDE THE SAME

The present invention relates to a positive electrode material, which includes a positive electrode active material, and a coating layer formed on a surface of the positive electrode active material, wherein the coating layer has a form in which polyimide is dispersed and distributed in an island shape, and a method of preparing the same.