METHOD FOR PREPARING GRAPHENE-LIKE DOPED POSITIVE ELECTRODE MATERIAL OF LITHIUM-ION BATTERY

Disclosed is a method for preparing a graphene-like doped positive electrode material of a lithium-ion battery, comprising the following steps: stirring a liquid polyacrylonitrile solution for 8-72 hours at 80-300°C, to form a micro-cyclic LPAN solution; adding a certain amount of a positive electrode material as powder of a lithium-ion battery to the micro-cyclized LPAN solution, uniformly mixing, grinding, drying at room temperature; calcining for 6-24 hrs at 500-1800°C under the protection of an inert gas, till the micro-cyclized LPAN forms a graphene-like structure uniformly dispersed in the positive electrode material of the lithium-ion battery, so as to obtain a graphene-like doped positive electrode material of the lithium-ion battery. The graphene-like doped positive electrode material of the lithium-ion battery obtained through the method has not only a high conductivity and specific capacity, but also a greatly improved cycling performance.