Process for reversely recycling and preparing lithium nickel manganese oxide by taking waste lithium battery as raw material

Abstract

The invention discloses a process for reversely recycling and preparing lithium nickel manganese oxide by taking waste lithium batteries as raw materials. The process is characterized by comprising the following steps of: (1) preprocessing a positive battery plate of a waste lithium battery to obtain anode power; (2) dissolving the anode power in inorganic acid, and eliminating impurities to obtain mixed acid liquor containing nickel and manganese; (3) adding a nickel source or a manganese source into the mixed solution; (4) adding an acetate complexing agent, and regulating the ratio of the acetate concentration to the total metal ion concentration; (5) putting the mixed solution into an electrolytic bath to be electrolyzed, and depositing nickel manganese oxide on a titanium plate; (6) stopping the conduction of a direct current, taking the titanium plate out, separating the nickel manganese oxide on the titanium plate, and drying the nickel manganese oxide to obtain nickel manganese oxide powder; (7) and uniformly mixing the nickel manganese oxide powder and a lithium source, and then calcining the mixture to obtain lithium nickel manganese oxide. According to the process, a regenerated product having the performance the same with the performance of the original product can be obtained by the waste battery through a reverse recycling process, so that the resource utilization can be realized.

Description

technical field [0001] The invention relates to a process for preparing lithium nickel manganese oxide, in particular to a process for preparing lithium nickel manganese oxide by reverse recycling waste lithium batteries as raw materials. Background technique [0002] With the continuous development of the digital product industry, people's demand for batteries is increasing. Lithium nickel manganese oxide is an important cathode material for lithium batteries. It is widely produced and used, and has a large market demand. While lithium batteries are booming, it can be predicted that in the near future, when the battery life ends, it will enter the scrapping stage. Based on the current quantity of lithium batteries, it can be estimated that the amount of scrapping is equally huge. [0003] The positive electrode material of waste lithium batteries is lithium nickel manganese oxide, etc., which can be recycled and used to make metal powder, metal oxide, chemical salt, etc. ...

AI Technical Summary

Problems solved by technology

However, the cost of feeding materials is relatively high. If ammonia water is used as a precipitant, ammonia nitrogen wastewater will be generated, which is not environmentally friendly, but also increases the cost of wastewater treatment

[0005] Electrodeposition is currently a method for recovering elemental metals. However, due to the large distance between the precipitation potentials of nickel and manganese, it is easy to separate nickel oxide and manganese oxide during electrodeposition, and it is difficult to co-deposit to obtain nickel manganese oxide; Moreover, the ratio and total concentration of nickel and manganese ion concentrations in the reaction system have a great influence on the morphology and structure of nickel-manganese oxides, so there is no report to illustrate the optimal nickel and manganese ion concentrations of electrodeposited nickel-manganese oxides.

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