Quaternary lithium ion battery positive electrode material recovery method

Abstract

The invention relates to a quaternary lithium ion battery positive electrode material recovery method. The method comprises the following steps: disassembling and roasting; performing ball milling; leaching an aluminum-containing solution; precipitating aluminum hydroxide; and precipitating the Li element. Compared with the prior art, the method has the beneficial effects that a quaternary positive electrode material is recycled for the first time, meanwhile, complex physical disassembly and cleaning processes do not need to be carried out on a positive electrode piece, contained aluminum current collectors and residual electrolyte can be treated, metals such as Li, Ni, Co and Mn can be used for remanufacturing of the lithium ion battery, and a large amount of alkali auxiliary materials can be repeatedly utilized in the whole process; and the whole recovery treatment process is simple in technology, short in technological process, few in auxiliary materials added in the reaction process, simple in wastewater, waste gas and solid waste treatment, energy-saving, environment-friendly, beneficial to industrial large-scale production, capable of meeting the requirements of the current industry and very wide in application prospect.

Description

technical field [0001] The invention belongs to the field of recycling waste lithium ion batteries, and in particular relates to a method for recycling valuable positive electrode materials in quaternary (nickel-cobalt-manganese-aluminum) lithium-ion batteries. Background technique [0002] Waste and pollution from lithium-ion batteries, which power everything from mobile phones to electric vehicles, are increasing at an alarming rate. It is predicted that by 2030, the world's scrapped lithium-ion batteries will reach more than 11 million tons. In contrast, less than 5% of discarded batteries can be recycled. If the problem of waste batteries is not well resolved, the pressure on the sustainable development of human beings will increase. Metals such as nickel, cobalt, manganese, and lithium have high recycling value. If they cannot be fully recycled, it will not only seriously damage the soil and groundwater, but also cause huge waste of value. The shortage of raw material...

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Problems solved by technology

However, the above methods do not consider the treatment of quaternary positive electrode materials. Aluminum is an amphoteric element. In the nickel, cobalt, manganese, lithium and other metals recovered by the above method, there will inevitably be aluminum impurities, so it cannot be applied to the positive electrode of quaternary lithium ion batteries. material recycling

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