Recycling process of waste ternary battery positive electrode material

The invention discloses a recovery process of a waste ternary battery positive electrode material, and relates to the technical field of battery materials. When the waste ternary battery positive electrode material is recycled, the waste ternary battery is firstly disassembled to obtain the positive electrode material, and then the positive electrode material is calcined and separated to obtain a positive electrode active material; the preparation method comprises the following steps: crushing corn straws, carbonizing with sodium sulfite and sodium hydroxide, oxidizing with a nitric acid solution and a sulfuric acid solution to prepare oxidized biomass porous carbon, and reacting the oxidized biomass porous carbon with hydrobromic acid, oxalic acid, ethylenediamine and 5, 6-epoxy hexyltriethoxysilane in sequence to prepare modified biomass porous carbon; and finally, reacting a positive active material, oxalic acid, a hydrogen peroxide solution, nickel sulfate hexahydrate, cobalt sulfate heptahydrate and mang