Preparation method of CNTs/Ag composite doped lithium cobalt oxide positive electrode material

The invention discloses a CNTs/Ag composite doped lithium cobalt oxide positive electrode material and a preparation method thereof, and belongs to the technical field of lithium ion batteries. The CNTs is a special one-dimensional tubular material and has a great length-diameter ratio, so that transportation of electrons in the CNTs has quantum characteristics, and high conductivity is shown. The surface of the CNTs is coated with a layer of metal silver, so that the CNTs can be uniformly dispersed in the positive electrode material, and meanwhile, the interface bonding of the CNTs and LiCoO2 is improved. And the CNTs and the nano-silver are compounded through ball milling, and the CNTs/Ag is prepared. The preparation method comprises the following steps: uniformly mixing a certain amount of CNTs/Ag with lithium cobalt oxide through ball milling, and carrying out heat treatment on the mixed positive electrode material at 300-600 DEG C for 4-6 hours to obtain the CNTs/Ag composite doped lithium cobalt oxide p