Composite positive electrode material, battery positive electrode, lithium battery and application thereof

The invention relates to the technical field of batteries, in particular to a composite positive electrode material, a battery positive electrode, a lithium battery and application thereof. The composite positive electrode material comprises a substrate and double coating layers coating the substrate, the first layer of the double coating layer comprises an electron conduction material, and the second layer comprises a chlorine-containing compound with high room temperature lithium ion conductivity; the matrix comprises a non-metallic element or a derivative thereof with electrochemical lithium storage activity, and the non-metallic element is one or more of selenium, sulfur or tellurium; and the matrix accounts for more than 40wt% of the mass of the whole composite positive electrode material. According to the invention, the active material with electrochemical lithium storage activity is coated with two layers of specific materials, so that the active content, reversible capacity, first effect, rate capabil