Process for recovering nickel cobalt lithium manganate positive electrode material by taking waste lithium ion battery as raw material

Abstract

The invention provides a process for recovering a nickel cobalt lithium manganate positive electrode material by taking a waste lithium ion battery as a raw material, and belongs to the field of waster lithium battery recovery. The method comprises the following steps: crushing a positive plate of the waste lithium ion battery, performing pyrolysis at the temperature of 400 to 450 DEG C, and screening to physically separate positive electrode powder from other materials; calcining the positive electrode material and acidic sulfate, and dissolving a calcined product in deionized water, whereinspecific dissolution steps and the setting of various parameters in the dissolution process are specifically disclosed; and removing impurities in leachate, co-precipitating with sodium carbonate andsodium bicarbonate mixed solution as a precipitant to prepare a carbonate precursor, and then mixing with lithium carbonate and calcining to obtain a nickel cobalt lithium manganate ternary positive electrode material. According to the process for recovering the nickel cobalt lithium manganate positive electrode material by taking the waste lithium ion battery as the raw material provided by the invention, the positive electrode material of the waste lithium ion battery is recycled, and through a reverse recovery process, the nickel cobalt lithium manganate ternary positive electrode materialis re-manufactured to achieve resource utilization.

Description

technical field [0001] The invention belongs to the field of recycling waste lithium ion batteries, and relates to a process for recycling and manufacturing nickel-cobalt lithium manganese oxide cathode materials from waste lithium ion batteries. Background technique [0002] As a high-energy, high-power and long-life secondary battery, lithium-ion batteries are widely used in many civilian and military fields such as mobile phones, digital cameras, notebook computers, and electronic instruments. With the rapid growth of the production and consumption of lithium-ion batteries in my country in recent years, the amount of scrapped lithium-ion batteries has increased dramatically. According to the statistics of China's battery industry, it is estimated that by 2020, my country's lithium ion consumption will reach 25 billion. Elements such as cobalt and fluorine are somewhat toxic to the environment. In addition to the battery quality with lithium cobalt oxide as the positive e...

AI Technical Summary

Problems solved by technology

In order to ensure a high leaching rate of these active substances, an excessive amount of inorganic acid and reducing agent is usually used for reductive acid leaching on the ternary positive electrode material. It also needs to use a large amount of alkali to neutralize, which increases the industrial cost and environmental pressure

Although the latest research also includes some organic acids + hydrogen peroxide to dissolve lithium-ion battery cathode materials, the high price of organic acids and hydrogen peroxide greatly increases the cost of industrial recycling

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