Preparation method of cathode material lithium cuprate for lithium-ion battery

The invention provides a preparation method of a cathode material lithium cuprate for a lithium-ion battery. The method comprises the following steps: firstly, adding lithium hydrate to deionized water for dissolving to obtain a clear solution of the lithium hydrate; adding the solution to a nano ball-mill, then adding cuprous oxide and the deionized water, carrying out ball-milling while stirring and controlling the solid content of slurry to be 25%-35%, wherein the sizes of suspended particles in the slurry obtained after ball-milling are 270-330nm; stirring the slurry evenly and then carrying out spray drying; and placing the obtained precursor powder into an electric furnace at 650-700 DEG C, and carrying out calcining in air to obtain the cathode material lithium cuprate for the lithium-ion battery. The lithium cuprate product obtained through the method provided by the invention is fine and uniform in size; the initial specific charge capacity at the rate of 0.1C is 223-232mAh/g; the initial specific discharge capacity is 207-214mAh/g; the coulombic efficiency is 91.3%-94.7%; and the cathode material lithium cuprate for the lithium-ion battery is the cathode material for the lithium-ion battery with application value.