A method for resource utilization of lithium battery waste positive electrode materials

A cathode material and lithium battery technology, applied in the field of resource utilization of waste cathode materials of lithium batteries, can solve the problems of low process efficiency and difficult impurity removal, and achieve the effects of high solution quality, easy impurity removal and purification, and beneficial to efficient recovery.

Active Publication Date: 2020-07-28
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

[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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  • A method for resource utilization of lithium battery waste positive electrode materials
  • A method for resource utilization of lithium battery waste positive electrode materials
  • A method for resource utilization of lithium battery waste positive electrode materials

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Embodiment 1

[0063] A method for resource utilization of lithium battery waste positive electrode materials, comprising the following steps:

[0064] (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 25 L of steam condensed water to make slurry , and after stirring evenly, add 500mL concentration of 30% hydrogen peroxide to obtain liquid-solid reaction components that meet the requirements;

[0065] (2) The deployment of gas phase reaction components: mix sulfur dioxide, sulfur trioxide, nitrogen monoxide, nitrogen dioxide and oxygen according to the volume ratio of 1:0.5:1:1.5:2.4 to obtain sulfur dioxide, trioxide and Gas-phase reactive components of sulfur oxides, nitrogen monoxide, nitrogen dioxide and oxygen mixtures;

[0066] (3) Three-phase one-step reaction: th...

Embodiment 2

[0075] A method for resource utilization of lithium battery waste positive electrode materials, comprising the following steps:

[0076] (1) Preparation of liquid-solid reaction components: Mix 10kg of waste positive electrode material powder that has been crushed and passed through a 100-mesh sieve with 0.8kg of manganese powder and 0.2kg of cobalt powder to obtain 11kg of solid components; mix the resulting solid phase components with 50L Mix steam condensed water to make pulp, and after stirring evenly, add 450mL of hydrogen peroxide with a concentration of 28% to obtain liquid-solid reaction components that meet the requirements;

[0077] (2) The deployment of gas phase reaction components: the waste gas containing 10% sulfur dioxide concentration, 1% nitrogen monoxide concentration and 10% oxygen concentration is passed into the catalytic reactor to convert part of sulfur dioxide and nitrogen monoxide into three Sulfur and nitrogen dioxide are oxidized to obtain a mixed g...

Embodiment 3

[0087] A method for resource utilization of lithium battery waste positive electrode materials, comprising the following steps:

[0088] (1) Preparation of liquid-solid reaction components: mix 20kg of waste positive electrode material powders that have been crushed and passed through a 120 mesh sieve with 0.5kg of cobalt powder, 0.5kg of manganese powder and 0.5kg of nickel powder to obtain 21.5kg of solid components; Mix the solid phase components with 50L of steam condensed water to make slurry, and after stirring evenly, add 600mL of 28% hydrogen peroxide to obtain the liquid-solid reaction components that meet the requirements;

[0089] (2) The deployment of gas phase reaction components: adding 1% sulfur trioxide gas to waste gas containing 10% sulfur dioxide concentration, 0.9% nitrogen monoxide concentration, 0.1% nitrogen dioxide concentration and 10% oxygen concentration, Obtain the mixed gas of sulfur dioxide, sulfur trioxide, nitrogen monoxide, nitrogen dioxide and...

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Abstract

The invention discloses a method for recycling the waste cathode materials 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) purifying a leaching liquid; (6) preparing a nickel-cobalt-manganese precursor;(7) recovering lithium resources; (8) preparing a new ternary cathode material; (9) recovering ammonia; and (10) recovering sodium. The unique three-phase one-step reaction system provided by the method can realize that the waste cathode material having any component can obtain high cobalt-nickel-manganese-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 Patents(China)
IPC IPC(8): H01M10/54C22B7/00C22B23/00C22B26/12C22B47/00
CPCC22B7/00C22B23/0407C22B26/12C22B47/0054H01M10/54Y02P10/20Y02W30/84
Inventor 邹廷军任燕
Owner 尤尼瑞克科技(成都)有限公司
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