Method for preparing lithium nickel cobalt manganese oxide by reverse positioning of power battery and application

Abstract

The invention belongs to the technical field of lithium battery recovery, and provides a method for preparing lithium nickel cobalt manganese oxide by reverse positioning of a power battery and application, which comprises the following steps: mixing and grinding a positive plate and a slag former, drying and cooling the mixture, adding aluminum powder, uniformly mixing the components, carrying out self-propagating reaction on the uniformly mixed material, cooling the reaction product, and collecting the lower coarse nickel cobalt manganese alloy; grinding the crude nickel-cobalt-manganese alloy, adding alkali liquor, soaking the alloy again, filtering the liquid and washing and drying the filter residues to obtain porous nickel-cobalt-manganese alloy powder; then adding a lithium salt solution into the porous nickel-cobalt-manganese alloy powder, stirring the solution, dropwise adding the alkali liquor, and ageing and filtering the liquid and collecting the filter residues; cleaning and drying the filter residues to obtain precursor mixed powder, sintering and cooling the precursor mixed powder, and drying the powder to obtain the lithium nickel cobalt manganate. According to the invention, short-distance butt joint of waste and raw materials is achieved, the technological process is short, consumption of used raw materials and auxiliary materials is small, energy consumption is low, the treatment cost is low, pollutant emission is small, and the whole process is environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of lithium battery recycling, in particular to a method and application for preparing nickel-cobalt lithium manganate by reverse positioning of a power battery. Background technique [0002] According to data from the Ministry of Industry and Information Technology, in 2019, the production and sales of new energy vehicles were 1.242 million and 1.206 million respectively. Among them, the production and sales of pure electric vehicles were 1.02 million and 972,000 respectively. Driven by the new energy vehicle industry, the power battery industry has developed rapidly. [0003] The large-scale promotion of new energy vehicles has driven the extensive use of power batteries. Power batteries usually have a lifespan of 5-8 years. After a certain period of use, the battery performance decays and does not meet the needs of consumers. It needs to be recycled and disassembled. The traditional recycling method is to...

AI Technical Summary

Problems solved by technology

When the traditional method is used to treat the positive electrode sheet, aluminum needs to be treated as an impurity. The traditional method has a long process flow, consumes a lot of raw and auxiliary materials, and has high energy consumption. After treatment, it will produce secondary wastewater, and the cost of secondary pollutant treatment is high. Limitations obvious

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