Recycling method of nickel cobalt lithium manganate battery, regenerated nickel cobalt lithium manganate material and application

Abstract

The invention provides a recycling method of a nickel cobalt lithium manganate battery, a regenerated nickel cobalt lithium manganate material and application, and belongs to the technical field of lithium batteries. The recycling method comprises the following steps of sorting the positive plates of the waste nickel cobalt lithium manganate batteries, and pre-treating the positive plates to obtain the positive material powder; roasting the positive electrode material powder to remove the impurities on the surface of the powder; adding the positive electrode powder material subjected to impurity removal into an acid solution for reaction and leaching to obtain a solid-liquid mixture; adding a lithium source into the solid-liquid mixture, heating to 100-150 DEG C, preserving heat for 10-20 hours, and drying by distillation to obtain a precursor material; and roasting the precursor material to obtain the regenerated nickel cobalt lithium manganate material. The regenerated nickel cobalt lithium manganate material prepared by the recycling method is in a blocky form, particles are smaller and more uniform, and the regenerated nickel cobalt lithium manganate battery has reversible capacity of 177.2 mAh.g <-1> and high coulombic efficiency.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a recovery method of a nickel-cobalt lithium manganate battery. In addition, the invention also relates to a regenerated nickel-cobalt lithium manganate material prepared by the above method, and a regenerated nickel-cobalt lithium manganate material. application. Background technique [0002] The huge potential of energy storage systems in the commercial, automotive, and industrial sectors is driving the growth in demand for lithium-ion batteries. The global market share of lithium-ion batteries continues to grow due to improvements in energy density and efficiency of lithium-ion batteries and widespread applications in electric and hybrid vehicles, energy, medical, and military. In recent years, nickel-cobalt-lithium manganese oxide (NCM) batteries have been widely used in electric vehicles and hybrid electric vehicles (HEVs) due to their high energy dens...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional waste nickel-cobalt-lithium manganese oxide recycling process is basically a complex and energy-intensive process involving solid-phase roasting and hydrometallurgical leaching processes

The solid-phase calcination process requires high temperature, which leads to the need to consume a large amount of electric energy to control the temperature, and the regeneration of lithium supplementation by solid-phase calcination cannot fully achieve the expected effect due to the limitation of direct lithium supplementation calcination.

The potential problem of hydrometallurgical leaching is the cumbersome precipitation process required for the recovery of metal elements after leaching

[0005] Therefore, although measures such as solid-phase roasting of regenerated nickel-cobalt lithium manganese oxide materials or acid leaching to recover precious metals in waste nickel-cobalt lithium manganese oxide materials have been taken in the prior art, there are still many defects in the recycling process.

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