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Method for recycling waste positive electrode material of lithium battery

A technology for positive electrode materials and lithium batteries, which is applied in the field of recycling waste positive electrode materials for lithium batteries, and can solve problems such as difficult removal of impurities and low process efficiency

Active Publication Date: 2019-02-15
尤尼瑞克科技(成都)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for recycling waste positive electrode materials of lithium batteries, which can effectively solve the problems of low efficiency and difficult removal of impurities in the existing process

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  • Method for recycling waste positive electrode material of lithium battery

Examples

Experimental program
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Effect test

Embodiment 1

[0061] A method for recycling waste positive electrode materials of lithium batteries, comprising the following steps:

[0062] (1) Preparation of liquid-solid reaction components: Mix 10 kg of waste positive electrode material powder that has been crushed and passed through an 80-mesh sieve with 1 kg of cobalt powder to obtain 11 kg of solid components; mix the obtained solid phase components with 22L of steam condensed water to make slurry , and after stirring evenly, add 500mL concentration of 30% hydrogen peroxide to obtain the required liquid-solid reaction components.

[0063] (2) Preparation of gas phase reaction components: mix pure sulfur dioxide, sulfur trioxide and oxygen according to the volume ratio of 1:0.5:1 to obtain the gas phase reaction components of sulfur dioxide, sulfur trioxide and oxygen mixed gas that meet the requirements ;

[0064](3) Three-phase one-step reaction: the liquid-solid phase reaction components obtained in step (1) and the gas phase rea...

Embodiment 2

[0073] A method for recycling waste positive electrode materials of lithium batteries, comprising the following steps:

[0074] (1) The deployment of liquid-solid reaction components: mix the ratio of waste positive electrode material powder 10kg, manganese 0.2kg and nickel 0.8kg after crushing through 100 mesh sieves to obtain 11kg solid mixed components; Mix 50L of steam condensed water, stir evenly, add 450mL of hydrogen peroxide with a concentration of 28%, and obtain the solid phase reaction components that meet the requirements;

[0075] (2) The allocation of gas phase reaction components: the waste gas containing sulfur dioxide concentration of 10% and oxygen concentration of 10% is passed into the catalytic reactor, so that part of the sulfur dioxide is converted into sulfur trioxide, and the concentration of sulfur dioxide is 8%. A mixed gas with a sulfur concentration of 2% and an oxygen concentration of 9%;

[0076] (3) Three-phase one-step reaction: the liquid-sol...

Embodiment 3

[0085] A method for recycling waste positive electrode materials of lithium batteries, comprising the following steps:

[0086] (1) The deployment of liquid-solid reaction components: mix the waste and old positive electrode material powder 20kg, manganese 0.5kg, nickel 0.5kg and cobalt 0.5kg after crushing through a 120 mesh sieve to obtain 21.5kg solid mixed components; The solid mixed component is mixed with 50L steam condensate, and after stirring evenly, 600mL of hydrogen peroxide with a concentration of 28% is added to obtain a solid phase reaction component that meets the requirements;

[0087] (2) The deployment of gas phase reaction components: add sulfur trioxide gas to the exhaust gas containing 10% sulfur dioxide concentration and 10% oxygen concentration to obtain a 1:0.2:1 mixed gas of sulfur dioxide, sulfur trioxide and oxygen concentration;

[0088] (3) Three-phase one-step reaction: send the liquid-solid phase reaction components obtained in step (1) and the g...

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Abstract

The invention discloses a method for recycling a waste positive electrode material of a lithium battery. The method comprises the following steps: (1), preparing a liquid-solid mixed component system;(2), preparing a gas-phase component; (3), performing a three-phase one-step reaction; (4), performing solid-liquid separation; (5), performing impurity-removing purification on a leaching solution;(6), preparing a nickel-cobalt-manganese precursor; (7), recycling a lithium resource; (8), preparing a novel ternary positive electrode material; (9), recycling sodium sulfate; (10), recycling ammonia. Through a unique three-phase one-step reaction system constructed by the invention, the waste positive electrode material with any component can achieve relatively high leaching efficiency in a cobalt-nickel-manganese-lithium one-step reaction.

Description

technical field [0001] The invention belongs to the technical field of lithium battery materials, and in particular relates to a method for reusing waste positive electrode materials of lithium batteries. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/52H01M10/54
CPCH01M6/52H01M10/54Y02W30/84
Inventor 邹廷军任燕
Owner 尤尼瑞克科技(成都)有限公司
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