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Method for preparing lithium nickelate cobaltate manganate cathode material by taking waste lithium ion batteries as raw material

A technology for nickel-cobalt lithium manganate and lithium ion batteries is applied in the field of preparing nickel-cobalt lithium manganate cathode materials, which can solve the problems of insufficient recovery of lithium, waste gas and waste water pollution, etc., so as to avoid high-temperature calcination, low cost, and energy efficiency. low consumption effect

Inactive Publication Date: 2014-02-26
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main methods of recycling research on waste lithium-ion batteries of various materials and nickel-cobalt-manganese-manganese batteries are: using sulfuric acid leaching, purification and impurity removal, hydroxide co-precipitation and other series of processes to recover nickel, cobalt and manganese, etc., and then add Lithium salt sintering to prepare nickel-cobalt-manganese ternary materials avoids the separation of nickel-cobalt-manganese, but the lithium in the system is not fully recovered, and inorganic acid dissolution and leaching and subsequent separation and washing will produce waste gas and wastewater pollution

Method used

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  • Method for preparing lithium nickelate cobaltate manganate cathode material by taking waste lithium ion batteries as raw material
  • Method for preparing lithium nickelate cobaltate manganate cathode material by taking waste lithium ion batteries as raw material

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Embodiment 1

[0012] (1) After the non-iron lithium-ion battery is discharged, disassemble the battery and separate the positive electrode sheet; (2) Put the positive electrode sheet obtained in step (1) into a vacuum furnace for high temperature treatment to decompose the binder; (3) Treatment High temperature pyrolysis of the positive electrode sheet, the positive electrode slurry is peeled off from the aluminum foil to obtain the positive electrode slurry; (4) the positive electrode slurry obtained in step (3) is dissolved in a citric acid solution with a molar concentration of 1.0mol / L, Among them, the ratio of the mass of positive electrode slurry to the volume of citric acid solution is 60g / L; (5) add reducing agent hydrogen peroxide solution, dissolve and filter; (6) measure the content of metal ions in the solution, use manganese nitrate, lithium nitrate , nickel nitrate and cobalt nitrate to adjust Li in the solution + , Mn 2+ 、Co 2+ and Ni 2+ The molar ratio is 3:1:1:1; (7) Use...

Embodiment 2

[0014] (1) After the non-iron lithium-ion battery is discharged, disassemble the battery and separate the positive electrode sheet; (2) Put the positive electrode sheet obtained in step (1) into a vacuum furnace for high temperature treatment to decompose the binder; (3) Treatment High temperature pyrolysis of the positive electrode sheet, the positive electrode slurry is peeled off from the aluminum foil to obtain the positive electrode slurry; (4) the positive electrode slurry obtained in step (3) is dissolved in a citric acid solution with a molar concentration of 0.75mol / L, Among them, the ratio of the quality of the positive electrode slurry to the volume of the citric acid solution is 45g / L; (5) add the reducing agent hydrogen peroxide solution, dissolve and filter; (6) measure the content of metal ions in the solution, use manganese acetate, lithium acetate , nickel acetate and cobalt acetate to adjust Li in the solution + , Mn 3+ 、Co 3+ and Ni 3+ The molar ratio is ...

Embodiment 3

[0016] (1) After the non-iron lithium-ion battery is discharged, disassemble the battery and separate the positive electrode sheet; (2) Put the positive electrode sheet obtained in step (1) into a vacuum furnace for high temperature treatment to decompose the binder; (3) Treatment High temperature pyrolysis of the positive electrode sheet, the positive electrode slurry is peeled off from the aluminum foil to obtain the positive electrode slurry; (4) the positive electrode slurry obtained in step (3) is dissolved in a citric acid solution with a molar concentration of 1.25mol / L, The ratio of the mass of positive electrode slurry to the volume of citric acid solution is 75g / L; (5) add reducing agent hydrogen peroxide solution, dissolve and filter; (6) measure the content of metal ions in the solution, use manganese sulfate, lithium sulfate , nickel sulfate and cobalt sulfate to adjust Li in the solution + , Mn 2+ 、Co 2+ and Ni 2+ The molar ratio is 3:1:1:1; (7) Use ammonia wa...

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Abstract

The invention discloses a method for preparing a lithium nickelate cobaltate manganate cathode material by taking waste lithium ion batteries as a raw material. The main points of the technical scheme comprise that an organic acid citric acid is mainly taken as a leaching agent and a gelata, a sol-gel process is employed for preparation of the lithium nickelate cobaltate manganate cathode material, and the specific preparation steps are disclosed. The method helps to avoid pollutions of S, N, chlorine and the like caused by inorganic acid leaching agents employed in conventional methods, helps to avoid by-product generation in metal ion separation process, the whole preparation process helps to avoid a high-temperature calcining link, and the method is low in energy consumption, green, environment-friendly and low in cost; and the prepared product can be returned to factories for sequential use.

Description

technical field [0001] The invention relates to the technical field of recovery and recycling of waste lithium-ion batteries, in particular to a method for preparing nickel-cobalt lithium manganese oxide positive electrode materials using waste lithium-ion batteries as raw materials. Background technique [0002] With the development of various power facilities and new energy vehicle industry, the market demand for lithium-ion batteries is increasing year by year. Waste lithium-ion batteries contain a large amount of precious metals and some flammable and toxic electrolytes. If the waste batteries are not treated, it will not only cause waste of resources, but also cause certain environmental pollution. [0003] However, the current research on the recycling of waste lithium-ion batteries is mainly focused on the recycling of lithium-ion batteries with lithium cobaltate as the positive electrode material. Cobalt is a very rare metal material, and the solid content in waste l...

Claims

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Application Information

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IPC IPC(8): H01M4/1391H01M10/54
CPCY02E60/122H01M4/505H01M4/525Y02E60/10Y02W30/84
Inventor 姚路席国喜姚海森丰勇邢新艳李运清
Owner HENAN NORMAL UNIV
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