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Cyclic preparation method for lithium battery positive electrode material

A technology for positive electrode materials and recycling preparation, which is applied in the direction of battery electrodes, positive electrodes, battery recycling, etc., can solve the problems that the extractant cannot be recycled and the performance of positive electrode materials is low, so as to facilitate efficient recycling, realize full utilization, and realize recycling The effect of using

Active Publication Date: 2020-01-03
尤尼瑞克科技(成都)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of the above-mentioned deficiencies in the prior art, the present invention provides a method for the recycling of lithium battery positive electrode materials, which can effectively solve the problem that the extractant in the existing preparation methods cannot be recycled and the properties of the obtained positive electrode materials low problem

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  • Cyclic preparation method for lithium battery positive electrode material
  • Cyclic preparation method for lithium battery positive electrode material
  • Cyclic preparation method for lithium battery positive electrode material

Examples

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Embodiment 1

[0041] A cyclic preparation method for a lithium battery positive electrode material, comprising the following steps: wherein, the positive electrode material is a 523-type ternary positive electrode material;

[0042] (1) Crushing and sieving waste positive electrode materials to obtain granular materials with a particle size of 80 meshes, adding cobalt dioxide, nickel dioxide, manganese dioxide and washing water to the granular materials, and mixing to obtain positive electrode material slurry, the positive electrode The liquid-solid mass ratio in the slurry is 2:1; the molar ratio of nickel, cobalt and manganese in the positive electrode slurry is 5:2:3;

[0043] (2) Take ammonium sulfite and ammonium thiosulfate, mix them evenly, then add washing water to it and stir to obtain an extractant, wherein the molar ratio of ammonium sulfite to ammonium thiosulfate is 0.05:1, and sulfurous acid The ratio of the total moles of ammonium and ammonium thiosulfate to the total moles o...

Embodiment 2

[0054] A method for cyclic preparation of a lithium battery positive electrode material, comprising the following steps: wherein, the positive electrode material is a 111-type ternary positive electrode material;

[0055] (1) Crushing and sieving waste positive electrode materials to obtain granular materials with a particle size of 200 mesh, adding tricobalt tetroxide, nickel dioxide, trimanganese tetraoxide and washing water to the granular materials, and mixing to obtain positive electrode material slurry, the positive electrode material The liquid-solid mass ratio in the slurry is 15:1; the molar ratio of nickel, cobalt and manganese in the positive electrode slurry is 1:1:1;

[0056] (2) Take ammonium sulfite and ammonium thiosulfate, mix them evenly, then add washing water to it and stir to obtain an extractant, wherein the molar ratio of ammonium sulfite to ammonium thiosulfate is 1:1, and sulfurous acid The ratio of the total moles of ammonium and ammonium thiosulfate ...

Embodiment 3

[0067] A method for cyclic preparation of a lithium battery positive electrode material, comprising the following steps: wherein, the positive electrode material is a 622-type ternary positive electrode material;

[0068] (1) Crushing and sieving waste positive electrode materials to obtain granular materials with a particle size of 160 mesh, adding tricobalt tetroxide, nickel dioxide, manganese dioxide and washing water to the granular materials, and mixing to obtain a positive electrode material slurry, the positive electrode material slurry The liquid-solid mass ratio in the positive electrode slurry is 3:1; the molar ratio of nickel, cobalt and manganese in the positive electrode slurry is 6:2:2;

[0069] (2) Take ammonium sulfite and ammonium thiosulfate, mix them evenly, then add washing water to it and stir to obtain an extractant, wherein the molar ratio of ammonium sulfite to ammonium thiosulfate is 0.2:1, and sulfurous acid The ratio of the total moles of ammonium an...

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Abstract

The invention provides a cyclic preparation method for a lithium battery positive electrode material. The method comprises the following steps of: blending of positive electrode slurry, blending of anextracting agent, extraction leaching reaction, liquid-solid separation, impurity removal and purification of leachate, preparation of a nickel-cobalt-manganese precursor, recovery of ammonia water,recovery of ammonium sulfate, cyclic preparation of the extracting agent, preparation of sodium-free battery-grade lithium hydroxide, regeneration of sulfuric acid and lithium hydroxide alkali liquorand preparation of a new positive electrode material. The method can effectively solve the problems that an extracting agent cannot be recycled and the prepared positive electrode material is low in performance in an existing preparation method.

Description

technical field [0001] The invention relates to the technical field of lithium battery cathode materials, in particular to a method for cyclic preparation of lithium battery cathode materials. Background technique [0002] As an energy storage product, lithium-ion batteries are widely used in electric tools, electric vehicles, mobile phones, notebook computers and other fields, and play an important role in people's production and life. In recent years, the high demand for energy storage products has led to an increase in the production of lithium-ion batteries year by year. After repeated charging and discharging of lithium-ion batteries during use, the electrode material will be separated from the current collector after repeated expansion and contraction, resulting in poor contact. At the same time, the crystal form of the positive electrode material will also change during repeated charging and discharging, which will cause Some lithium ions cannot be freely intercalate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M4/36H01M4/505H01M4/525
CPCH01M4/362H01M4/505H01M4/525H01M10/54H01M2004/028Y02E60/10Y02W30/84
Inventor 任燕邹廷军
Owner 尤尼瑞克科技(成都)有限公司
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