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Method for performing resource utilization on lithium battery waste cathode material

A cathode material and recycling technology, which is applied in the field of resource utilization of waste cathode materials of lithium batteries, can solve the problems of difficult impurity removal and low process efficiency, and achieves high solution quality, easy impurity removal and purification, and is conducive to efficient recovery. Effect

Active Publication Date: 2019-04-09
重庆绿色电池研究院有限公司
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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 existing processes

Method used

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  • Method for performing resource utilization on lithium battery waste cathode material
  • Method for performing resource utilization on lithium battery waste cathode material
  • Method for performing resource utilization on lithium battery waste cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A method for recycling waste cathode materials of lithium batteries, comprising the following steps:

[0064] (1) Preparation of liquid-solid reaction components: mix 10 kg of waste cathode material powder that has been crushed and passed through an 80-mesh sieve with 1 kg of zero-valent cobalt powder to obtain 11 kg of solid components; mix the obtained solid components with 25 L of steam condensate After slurrying and stirring evenly, 450ml concentration of 30% hydrogen peroxide was added to obtain liquid-solid reaction components meeting the requirements.

[0065] (2) Preparation of gas phase reaction components: mix pure nitric oxide, nitrogen dioxide and oxygen according to the ratio of 1:0.5:1 by volume to obtain the required mixed gas of nitric oxide, nitrogen dioxide and oxygen gas phase reaction components;

[0066](3) Three-phase one-step reaction: the liquid-solid phase reaction components obtained in step (1) and the gas phase reaction components obtained i...

Embodiment 2

[0075] A method for recycling waste cathode materials of lithium batteries, comprising the following steps:

[0076] (1) Preparation of liquid-solid reaction components: Mix 10kg of waste positive electrode material powder, 0.2kg of zero-valent cobalt and 0.8kg of manganese after crushing through a 100-mesh sieve to obtain 11kg of solid mixed components; Divide and mix with 50L steam condensed water, stir evenly and add 550ml concentration of 28% hydrogen peroxide to obtain the required solid phase reaction components;

[0077] (2) The allocation of gas phase reaction components: the exhaust gas containing 10% nitric oxide concentration and 10% oxygen concentration is passed into the catalytic reactor, so that part of the nitric oxide is converted into nitrogen dioxide, and the nitric oxide concentration is obtained. A mixed gas with 8%, nitrogen dioxide concentration of 2%, and oxygen concentration of 9%;

[0078] (3) Three-phase one-step reaction: the liquid-solid phase rea...

Embodiment 3

[0087] A method for recycling waste cathode materials of lithium batteries, comprising the following steps:

[0088] (1) Preparation of liquid-solid reaction components: Mix 20kg of waste positive electrode material powder, 0.5kg of zero-valent manganese, 0.5kg of zero-valent nickel and 0.5kg of zero-valent cobalt after crushing and passing through a 120-mesh sieve to obtain 21.5kg of solid Mixing components; mixing the obtained solid mixing components with 50L of steam condensed water, stirring evenly, adding 600ml of hydrogen peroxide with a concentration of 28%, to obtain a solid phase reaction component that meets the requirements;

[0089] (2) The allocation of gas phase reaction components: add nitrogen dioxide gas to the exhaust gas containing nitric oxide concentration of 1% and oxygen concentration of 10%, so that the concentration of nitrogen monoxide, nitrogen dioxide and oxygen is 1:0.5:10 mixed composition;

[0090] (3) Three-phase one-step reaction: send the liq...

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Abstract

The invention discloses a method for performing resource utilization on a lithium battery waste cathode material. The method comprises the following steps: (1), preparing a liquid-solid mixed component system; (2) preparing gaseous phase component; (3) performing three-phase one-step reaction; (4) performing solid-liquid separation; (5) cleaning and purifying leachate; (6) preparing nickel-cobalt-manganese precursor; (7) recycling a lithium resource; (8) preparing a new ternary cathode material; (9) recycling sodium nitrate; and (10) recycling ammonia. Through the unique three-phase one-step reaction system constructed by the method disclosed by the invention, the waste cathode material with any components can acquire relatively high Co-Ni-Mn-lithium one-step reaction leaching efficiency.

Description

technical field [0001] The invention belongs to the technical field of lithium battery materials, and in particular relates to a method for recycling 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 free...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00C22B23/00
CPCC22B7/007C22B23/0415H01M10/54Y02W30/84Y02P10/20
Inventor 邹廷军任燕
Owner 重庆绿色电池研究院有限公司
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