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Treatment method for coating carbon on surface of ternary positive electrode material of lithium ion battery and combustion device

A lithium-ion battery and cathode material technology, applied in the field of new energy material preparation, can solve the problems of lattice oxygen loss and other problems, and achieve the effects of suppressing loss, good cycle stability, and preventing capture

Active Publication Date: 2022-01-07
陕西君普新航科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, during the sintering process of NCM materials, there is usually serious lattice oxygen loss, which leads to the need for NCM cathode materials to be sintered in a pure oxygen environment.

Method used

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  • Treatment method for coating carbon on surface of ternary positive electrode material of lithium ion battery and combustion device
  • Treatment method for coating carbon on surface of ternary positive electrode material of lithium ion battery and combustion device
  • Treatment method for coating carbon on surface of ternary positive electrode material of lithium ion battery and combustion device

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Embodiment 1

[0076] Embodiment 1 of the present invention provides a treatment method for coating carbon on the surface of a lithium ion battery ternary positive electrode material, the treatment method is:

[0077] Step 101, humic acid is used as the carbon source, and the purity requirement is analytically pure AR;

[0078] Step 102, configuring a mixed solution of ethanol and acetone according to the volume ratio of 2:1;

[0079] Step 103, adding humic acid into the mixed solution at a ratio of 200 g of humic acid per 100 ml of solution;

[0080] Step 104, stirring at 30°C for 30 minutes at a stirring speed of 500r / min;

[0081] Step 105, filtering to obtain a black solution;

[0082] Step 106, adding LiOH to the black solution;

[0083] Step 107, the addition ratio is 30g of LiOH per 100ml of black solution;

[0084] Step 108, stirring at a speed of 500r / min for 30min;

[0085] Step 109, adding citric acid to the liquid to adjust the pH value to 1;

[0086] Step 110, drying the l...

Embodiment 2

[0096] Embodiment 2 of the present invention provides a treatment method for coating carbon on the surface of a lithium-ion battery ternary positive electrode material, the treatment method is:

[0097] Step 101, humic acid is used as the carbon source, and the purity requirement is analytically pure AR;

[0098] Step 102, configure the mixed solution of ethanol and acetone according to the volume ratio of 5:1;

[0099] Step 103, adding humic acid into the mixed solution at a ratio of 300 g of humic acid per 100 ml of solution;

[0100] Step 104, stirring at 50°C for 60 minutes at a stirring speed of 600r / min;

[0101] Step 105, filtering to obtain a black solution;

[0102] Step 106, adding LiOH to the black solution;

[0103] Step 107, the addition ratio is 50g of LiOH per 100ml of black solution;

[0104] Step 108, stirring at a speed of 600r / min for 60min;

[0105] Step 109, adding citric acid to the liquid to adjust the pH value to 2.5;

[0106] Step 110, drying the...

Embodiment 3

[0116] Embodiment 3 of the present invention provides a treatment method for coating carbon on the surface of a lithium-ion battery ternary positive electrode material, the treatment method is:

[0117] Step 101, humic acid is used as the carbon source, and the purity requirement is analytically pure AR;

[0118] Step 102, configure the mixed solution of ethanol and acetone according to the volume ratio of 3:1;

[0119] Step 103, adding humic acid into the mixed solution at a ratio of 250 g of humic acid per 100 ml of solution;

[0120] Step 104, stirring at 40° C. for 30 to 60 minutes at a stirring speed of 550 r / min;

[0121] Step 105, filtering to obtain a black solution;

[0122] Step 106, adding LiOH to the black solution;

[0123] Step 107, the addition ratio is 40g of LiOH per 100ml of black solution;

[0124] Step 108, stirring at a speed of 550r / min for 45min;

[0125] Step 109, adding citric acid to the liquid to adjust the pH value to 2;

[0126] Step 110, dry...

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Abstract

The invention discloses a treatment method for coating carbon on the surface of a ternary positive electrode material of a lithium ion battery and a combustion device. The treatment method comprises the following steps: placing a carbon source in a mixed solution of ethanol and acetone, magnetically stirring, and filtering to obtain a black solution; dissolving lithium hydroxide (LiOH) and citric acid in the black solution, uniformly stirring and drying to obtain first black powder; mixing the first black powder, NCM positive electrode material powder and PVA, and carrying out ball milling to obtain second black powder; and carrying out flame combustion on the second black powder in the combustion device to obtain the NCM ternary positive electrode material powder coated with carbon on the surface. The ternary NCM positive electrode material prepared by the invention has good cycling stability, and humic acid is rapidly cured by adopting the flame combustion method, so that effective carbon coating is formed; the coating carbon is prevented from capturing oxygen on the surface of the NCM in the sintering process through the strong oxidation effect of ozone, and the escape of lattice oxygen is effectively inhibited.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of new energy materials, and in particular relates to a treatment method and a combustion device for coating carbon on the surface of a lithium-ion battery ternary positive electrode material. Background technique [0002] Lithium-ion batteries are widely used in mobile electronic devices, electric vehicles, medical supplies, aerospace and national defense due to their advantages such as working voltage, energy density and high safety. The positive electrode material is the core material that constitutes the lithium-ion battery. The current commercialized positive electrode materials mainly include LiFePO with olivine structure. 4 , layered LiCoO 2 and ternary LiNi x mn y co z o 2 (x+y+z=1, NCM). [0003] Due to the synergistic effect of Ni, Mn and Co, NCM has the advantages of high discharge specific capacity, simple synthesis process and low cost, and has a good application pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00C01B32/05H01M4/36H01M4/50H01M4/505H01M4/52H01M4/525H01M4/583H01M4/62H01M10/0525
CPCC01G53/44C01B32/05H01M4/366H01M4/502H01M4/505H01M4/523H01M4/525H01M4/583H01M4/625H01M10/0525H01M2004/028Y02E60/10
Inventor 王中旭
Owner 陕西君普新航科技有限公司
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