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Preparation method of lithium ion battery composite positive electrode material

A composite positive electrode material and lithium-ion battery technology, which is applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve problems such as inability to improve product performance, and achieve the effects of automatic control, product performance improvement, and continuous process flow

Active Publication Date: 2021-06-29
XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only realize the automation operation, and it cannot improve the performance of the product

Method used

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  • Preparation method of lithium ion battery composite positive electrode material
  • Preparation method of lithium ion battery composite positive electrode material

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preparation example Construction

[0010] The present invention provides a kind of preparation method of lithium-ion battery composite cathode material, and it comprises the following steps:

[0011] S1: Pour the metal salt solution and the alkali solution into the reaction kettle at the same time to carry out the co-precipitation reaction.

[0012] Preferably, the metal salt includes at least one of nickel salt, cobalt salt, manganese salt, aluminum salt, zirconium salt and tungsten salt. The nickel salt, cobalt salt, manganese salt, aluminum salt, zirconium salt and tungsten salt are at least one of sulfate, chloride, acetate, nitrate and oxalate.

[0013] The alkaline solution is an aqueous solution containing a precipitating agent and a complexing agent. Preferably, the precipitation agent includes at least one of lithium hydroxide, sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, and potassium carbonate. The complexing agent includes at least one of ammonia water, oxalic acid,...

Embodiment 1

[0041] Put the nickel salt, cobalt salt and manganese salt corresponding to the weight according to the molar ratio of nickel, cobalt and manganese of 6:2:2 into a configuration tank filled with a predetermined volume of high-purity anhydrous brine, and stir evenly to obtain a mixed metal saline solution. Pour the prepared mixed metal salt solution into the reaction kettle, and at the same time, inject an appropriate amount of sodium hydroxide solution and ammonia water according to the production process requirements, and adjust the pH value to 11.5. The feed liquid that reaches the predetermined index is overflowed into the aging tank for aging.

[0042] Pour the aged finished product liquid into a high-temperature coating machine, adjust the reaction temperature of the high-temperature coating machine to 130°C, and control the high-temperature coating machine to stir the finished product liquid for 0.5 hours; adjust the The rotation speed of the high-temperature coating ma...

Embodiment 2

[0046] Put nickel salt, cobalt salt and manganese salt corresponding to the weight of nickel, cobalt and manganese in a molar ratio of 6:2:2 into a configuration tank filled with a predetermined volume of high-purity anhydrous brine, and stir evenly to obtain a mixed metal saline solution. Pour the prepared mixed metal salt solution into the reaction kettle, and at the same time, inject an appropriate amount of sodium hydroxide solution and ammonia water according to the production process requirements, and adjust the pH value to 11.5. The feed liquid that reaches the predetermined index is overflowed into the aging tank for aging.

[0047] Pour the aged finished product liquid into a high-temperature coating machine, adjust the reaction temperature of the high-temperature coating machine to 130°C, and control the high-temperature coating machine to stir the finished product liquid for 0.5 hours; adjust the The rotation speed of the high-temperature coating machine is 150 rpm...

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Abstract

The invention provides a preparation method of a lithium-ion battery composite positive electrode material, which comprises the following steps: injecting a metal salt solution and an alkali solution into a reactor at the same time to carry out a co-precipitation reaction; overflowing the reacted material liquid into an aging tank Intermediate aging; pour the aged finished product liquid into a high-temperature coating machine for solid-liquid separation to obtain dry precursor particles; control the rotation speed of the high-temperature coating machine to keep the precursor particles at a certain material dispersion; the doping coating solution is poured into the high-temperature coating machine to react to obtain a lithium-containing composite positive electrode material precursor, and the doping coating solution includes a lithium source and a doping substance; the lithium-containing The composite cathode material precursor is transported to a rotary kiln for sintering to obtain a composite cathode material. By adopting the preparation method of the invention, the performance of the product is improved while realizing automatic production.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery composite cathode materials, in particular to a preparation method of a lithium-ion battery composite cathode. Background technique [0002] Lithium-ion battery composite cathode materials are widely used in digital products, electric tools, energy storage power supplies, new energy vehicles and other fields because of their advantages such as high specific capacity, high cycle life, and good portability. With the rapid development of the new energy vehicle industry, the demand for power lithium-ion batteries is also increasing rapidly. At the same time, as the standards of new energy vehicles increase, the requirements for lithium-ion battery composite cathode materials are also increasing. [0003] Chinese patent CN102522526B provides a converter-type lithium battery cathode or anode material production equipment and process, which uses a fluidized mixing device to physically mix ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 林琳魏国祯王静任叶耀滨曾雷英
Owner XTC NEW ENERGY MATERIALS(XIAMEN) LTD