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

A technology of lithium ion battery and lithium nickel cobalt manganate, applied in the field of waste lithium ion battery recycling, can solve the problems of high price of organic acid and hydrogen peroxide, increase industrial cost and environmental pressure, increase industrial recycling cost, etc. Controlled, pH stable, simple steps to effect

Inactive Publication Date: 2018-10-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 increa

Method used

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

Examples

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Effect test

Embodiment 1

[0033] A kind of technology that reclaims and prepares nickel cobalt lithium manganese oxide cathode material with waste lithium ion battery as raw material comprises the following steps:

[0034] (1) Pulverize the positive electrode sheet of the battery cell, pyrolyze it in air at 400° C., and sieve it with a 200-mesh standard sieve under vibration to obtain 10 g of positive electrode powder.

[0035] (2) Add 28 g of ammonium sulfate to the positive electrode powder and mix well, and then bake in a muffle furnace under the condition of air ventilation, the roasting temperature is 470° C., and the roasting time is 2 hours. Then add 100 mL of deionized water to the roasted product, perform leaching at 60° C., and filter to obtain the leaching solution.

[0036] (3) Remove impurity iron by yellow sodium iron vanadium method in leaching solution, after hydrolysis method removes impurity aluminum at the same time, measure and analyze the nickel ion concentration in the leaching so...

Embodiment 2

[0043] A kind of technology that reclaims and prepares nickel cobalt lithium manganese oxide cathode material with waste lithium ion battery as raw material comprises the following steps:

[0044] (1) The positive electrode sheet of the battery cell was crushed, pyrolyzed in air at 400° C., and sieved with a 200-mesh standard sieve under vibration to obtain 9.8 g of positive electrode powder.

[0045] (2) Add 29g of ammonium sulfate + 3g of urea to the positive electrode powder and mix well, and then roast in a muffle furnace under an ammonia gas atmosphere, the roasting temperature is 450°C, and the roasting time is 1.5h. Then add 100 mL of deionized water to the roasted product, perform leaching at 60° C., and filter to obtain the leaching solution.

[0046] (3) Remove impurity iron by yellow sodium iron vanadium method in leaching liquid, after hydrolysis method removes impurity aluminum, record the nickel ion concentration in leaching liquid to be 0.94mol L -1 , the cobal...

Embodiment 3

[0051] A kind of technology that reclaims and prepares nickel cobalt lithium manganese oxide cathode material with waste lithium ion battery as raw material comprises the following steps:

[0052] (1) Disassemble the battery cell, take out the positive electrode sheet; crush the positive electrode sheet, pyrolyze it at 400°C in an atmosphere of ammonia + nitrogen (1:1), and sieve it with a 200-mesh standard sieve under vibration to obtain Positive electrode powder 11g.

[0053] (2) Add 31 g of ammonium sulfate + 5 g of ammonium bicarbonate to the positive electrode powder and mix well, and then roast in a muffle furnace under an ammonia gas atmosphere, the roasting temperature is 470 ° C, and the roasting time is 1.5 h. Then add 100 mL of deionized water to the roasted product, perform leaching at 60° C., and filter to obtain the leaching solution.

[0054] (3) After removing the impurity iron and the hydrolysis method to remove the impurity aluminum in the leaching solution,...

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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...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 潘军青于曼金鑫孙艳芝
Owner BEIJING UNIV OF CHEM TECH
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