Treatment method for waste lithium-ion battery

Abstract

The invention relates to the technical field of comprehensive utilization of resources and discloses a treatment method for a waste lithium-ion battery. The method comprises the following steps: carrying out disassembling, discharging, breaking, crushing and sorting; carrying out alkaline transfer, acid dissolution and impurity removal on the sorted electrode material; and then carrying out chemical separation through pretreatment on the waste lithium-ion battery, wherein extraction and separation are a key step; partial cobalt is separated from lithium to obtain a nickel-cobalt-lithium, nickel-cobalt or nickel-cobalt-manganese mixed salt, a lithium salt and a cobalt salt; mixed sulfate regenerates a cathode material through chemical synthesis; an electrolyte and the cathode material can be obtained in the overall treatment process; the recovery rate of the cathode material is improved; and the recovery purity of copper, aluminum and the like are improved. In addition, the cathode material is directly produced; the production process is shortened; and construction of the circulating industry chain of battery production, battery recovery treatment and battery production is increased.

Description

technical field [0001] The invention relates to the technical field of energy saving and environmental protection, in particular to a method for treating waste lithium ion batteries. Background technique [0002] Lithium-ion battery is a green battery with a series of excellent performances. It has been widely used in civil and military applications such as mobile phones, notebook computers, video cameras, and digital cameras since it came out more than 10 years ago. However, its lifespan is only about 3 years. With the widespread application of lithium-ion batteries, a large number of them have entered the stage of failure and recycling. How to recycle waste lithium-ion batteries and recycle them has become a common concern of the society. Recycling waste lithium-ion batteries can not only solve a series of environmental problems caused by waste batteries, but also recycle non-ferrous metals in batteries, which can effectively alleviate the shortage of resources. [0003] ...

AI Technical Summary

Problems solved by technology

[0008] The treatment methods of waste lithium-ion batteries in the prior art are all focused on the recovery of positive electrode materials, non-ferrous metals, etc., or the treatment methods can only be applied to specific waste lithium-ion batteries, ignoring the recovery and treatment of electrolytes and other substances therein, and The secondary pollution of the environment and the waste of resources are caused during the binder treatment process. The recovery of active materials is aimed at recovering cobalt and lithium, and the online production of active materials for positive electrode materials is not considered.

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