Resource recycling method of waste battery cathode materials

Abstract

The invention relates to a resource recycling method of waste battery cathode materials. The resource recycling method comprises the following steps: performing high-temperature calcinating to the waste battery cathode materials so as to separate active powder in the cathode materials from aluminum foil; dissolving the obtained active powder into acid solution, and then filtering to obtain filtrate; determining the concentration of metal ions in the filtrate, and correspondingly supplementing nickel and / or cobalt and / or manganese ions into the solution, so that the molar concentration ratio of nickel, cobalt and manganese ions is 1:1:1; adding sodium hydroxide into the prepared nickel, cobalt and manganese mixture solution, and heating to lead the nickel, cobalt and manganese ions to be co-precipitated, then filtering the precipitate and washing and drying to obtain a nickel-cobalt-manganese precursor; adding sodium carbonate into the filtrate obtained in the step IV, and reacting to obtain lithium carbonate precipitate, filtering, washing and drying the lithium carbonate precipitate, to obtain lithium carbonate powder; and mixing the nickel-cobalt-manganese precursor with the lithium carbonate powder, and calcinating to obtain the lithium nickel cobalt manganese cathode materials. A ternary cathode material is prepared by resource recycling ofvarious battery materials, and batteries produced from the ternary cathode material are lower in cost, higher in electric capacity and better in performance compared with single cobalt-lithium batteries, manganese-lithium batteries and nickel-lithium batteries.

Description

technical field [0001] The invention relates to the technical field of power battery recycling, in particular to a recycling method for positive electrode materials of waste batteries Background technique [0002] In recent years, due to the increasingly prominent problems of environmental pollution and energy crisis, new energy vehicles and power batteries have developed by leaps and bounds. Power batteries include lead-acid batteries, nickel-metal hydride power batteries and lithium-ion power batteries, among which lithium-ion power batteries with high energy density and cycle characteristics are known as the best development direction for power batteries in the future. With the continuous upgrading of electronic and electrical products and the continuous increase in the production and sales of new energy vehicles, the number of waste lithium-ion batteries will increase sharply. Waste lithium batteries contain a large amount of metal lithium and cobalt, among which lithiu...

AI Technical Summary

Problems solved by technology

Although the above two recycling technologies are relatively mature, they both have certain technical defects, including the use of too expensive reagents, serious loss of metal resources during the separation process, large consumption of acid and alkali, difficult disposal of subsequent waste liquid, and large environmental load.