Preparation method of manganese precursor of positive electrode material of lithium manganate ion battery

A manganese precursor, ion battery technology, used in battery electrodes, manganate/permanganate, positive electrodes, etc., can solve the problem of difficulty in finding manganese precursors, and achieve controllable particle size distribution, high purity, The effect of efficient preparation

Pending Publication Date: 2020-11-27
湖南双富新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Among the current positive electrode materials for power lithium-ion batteries, lithium manganate spinel positive electrode material, whose chemical formula is LiMn2O4, has the advantages of high discharge platform, good rate performance, high safety performance, low cost and environmental friendliness, and has become a popular choice in recent years. The application field of power lithium-ion battery in the global market has greatly increased the positive electrode material, but it is difficult to find a suitable high-purity manganese precursor in the market. Therefore, we provide a manganese oxide lithium-ion battery positive electrode material manganese precursor Preparation

Method used

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  • Preparation method of manganese precursor of positive electrode material of lithium manganate ion battery
  • Preparation method of manganese precursor of positive electrode material of lithium manganate ion battery
  • Preparation method of manganese precursor of positive electrode material of lithium manganate ion battery

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Effect test

Embodiment 1

[0020] S1 After ball milling and activating metal manganese flakes for 2 hours, manganese slurry is prepared for use, and the particle size D50 of manganese powder is controlled within the range of 30-150 microns;

[0021] The reaction temperature of S2 is controlled at 60°C, the synthesis method is batch type, the feed rate of manganese source is controlled at 100kg / h, and 10kg of reagent A, 1L of reagent B, 150ml of reagent C, 150ml of reagent D, and reagent E are added with a metal molar ratio of 0.005 Sulfate, through the air or oxygen for oxidation precipitation reaction, air or oxygen 60m 3 / h, control the PH value to realize the regulation of the particle size of the precursor, the PH control range is between 7-8, stop feeding when it reaches 6 microns, and stop the reaction when the temperature drops below 40°C;

[0022] After the S3 manganese precursor is synthesized, the corresponding impurities are removed by pressure filtration or centrifugal washing, and then drie...

Embodiment 2

[0024] S1 After activating the manganese flakes by ball milling for 1 hour, make manganese slurry for later use, and the particle size of the manganese powder is controlled at 60-150 microns;

[0025] The S2 reaction temperature is controlled at 65°C, the synthesis method is batch type, the manganese source feed rate is controlled above 150kg / h, and 15kg of A reagent, 1.5L of B reagent, 150ml of C reagent, and 150ml of D reagent are added, and the E reagent is a metal mole. Sulphate with a ratio of 0.01, the oxidation precipitation reaction is carried out by feeding air, and the air volume is 80m 3 / h, the pH control range is between 10-11, stop feeding when the product reaches 10 microns, and stop the reaction when the temperature drops below 40°C;

[0026] After the S3 manganese precursor is synthesized, the corresponding impurities are removed by pressure filtration or centrifugal washing, and then dried and sieved to remove iron.

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Abstract

The invention relates to the technical field of batteries, and discloses a preparation method of a manganese precursor of a positive electrode material of a lithium manganate ion battery. The preparation method of the manganese precursor comprises the following specific preparation steps: S1, ball-milling and activating metal manganese into manganese powder for later use; S2, adding manganese powder into a reaction kettle in multiple batches, adding five reagents including a catalyst A, a catalyst B, a catalyst C, a catalyst D and a catalyst E in proportion, introducing air for reaction, controlling the pH value in the reaction process, regulating and controlling the granularity of a precursor, stopping feeding when the target granularity is reached, and stopping reaction when the temperature is reduced to 40 DEG C or below; and S3, synthesizing the manganese precursor, washing the manganese precursor with water, carrying out filter pressing, centrifuging, drying, mixing in batches, sieving, removing iron, and packaging to obtain the product. Compared with a product synthesized by a traditional process, the manganese precursor prepared by the method is high in purity, controllablein particle size distribution, easy to calcine in a subsequent sintering process and excellent in performance, and the rate capability and the safety performance of the material can be improved on thebasis of improving the battery capacity.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for preparing a manganese precursor of a cathode material of a lithium manganate ion battery. Background technique [0002] Among the current positive electrode materials for power lithium-ion batteries, lithium manganate spinel positive electrode material, whose chemical formula is LiMn2O4, has the advantages of high discharge platform, good rate performance, high safety performance, low cost and environmental friendliness, and has become a popular choice in recent years. The application field of power lithium-ion battery in the global market has greatly increased the positive electrode material, but it is difficult to find a suitable high-purity manganese precursor in the market. Therefore, we provide a manganese oxide lithium-ion battery positive electrode material manganese precursor Preparation. Contents of the invention [0003] Technical issues resolved [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12H01M4/505H01M10/0525
CPCC01G45/1235H01M4/505H01M10/0525C01P2004/01C01P2006/40H01M2004/028Y02E60/10
Inventor 刘奇周伏云
Owner 湖南双富新材料科技有限公司
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