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A method for resource utilization of waste cathode materials of lithium batteries

A cathode material and recycling technology, which is applied in the field of resource utilization of waste cathode materials for lithium batteries, can solve the problems of difficult impurity removal and low process efficiency, and achieve high-quality solutions, easy impurity removal and purification, and high-efficiency recycling. Effect

Active Publication Date: 2021-07-13
重庆绿色电池研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • A method for resource utilization of waste cathode materials of lithium batteries
  • A method for resource utilization of waste cathode materials of lithium batteries

Examples

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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 mixing and pulping, and stirring evenly, add 450ml of 30% hydrogen peroxide to obtain liquid-solid reaction components that meet the requirements.

[0065] (2) Preparation of gas phase reaction components: Mix pure nitric oxide, nitrogen dioxide and oxygen according to the volume ratio of 1 : 0.5 : 1 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 in step ...

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 cathode material powder, 0.2kg of zero-valent cobalt, and 0.8kg of manganese after crushing and passing through a 100-mesh sieve to obtain 11kg of solid mixed components; Divide and mix with 50 L of steam condensed water, stir evenly and add 550 ml of hydrogen peroxide with a concentration of 28% to obtain a solid phase reaction component that meets the requirements;

[0077] (2) The deployment 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, 2% nitrogen dioxide concentration and 9% oxygen concentration;

[0078] (3) T...

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 cathode material powder, 0.5kg of zero-valent manganese, 0.5kg of zero-valent nickel and 0.5kg of zero-valent cobalt that have been crushed and passed through a 120-mesh sieve to obtain 21.5kg of solid Mixed components: Mix the obtained solid mixed components with 50 L of steam condensed water, stir evenly and add 600 ml of hydrogen peroxide with a concentration of 28% to obtain a solid phase reaction component that meets the requirements;

[0089] (2) Preparation of gas-phase reaction components: add nitrogen dioxide gas to the waste gas containing 1% nitric oxide and 10% oxygen to obtain a concentration of nitric oxide, nitrogen dioxide and oxygen of 1 : 0.5 : 10 mixed composition;

[0090] (3) Three-phase one-step reaction: Send the liquid-solid phase reaction components obtained in step ...

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Abstract

The invention discloses a method for resource utilization of waste positive electrode materials of lithium batteries. The method comprises the following steps: (1) preparing a liquid-solid mixed component system; (2) preparing gas phase components; (3) three-phase one-step reaction; (4) solid-liquid separation; (5) impurity removal and purification of leachate; 6) Preparation of nickel-cobalt-manganese precursor; (7) Recovery of lithium resources; (8) Preparation of new ternary cathode materials; (9) Recovery of sodium nitrate; (10) Recovery of ammonia. The unique three-phase one-step reaction system constructed by the present invention can realize a higher one-step reaction leaching efficiency of cobalt, nickel, manganese and lithium for waste positive electrode materials of any composition.

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 Patents(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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