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Preparation method and application of lithium ion battery positive electrode material

A lithium-ion battery and cathode material technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve problems such as poor product stability, uneven coating, complex processes, etc., to achieve good consistency, easy reaction control, The effect of simple process flow

Active Publication Date: 2021-05-25
XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems, the present application aims to provide a preparation method of lithium-ion battery positive electrode material, which is coated by wet method. The method is simple to operate, safe, low in cost and good in stability. There are deficiencies in complex technical process, uneven coating, and poor product stability

Method used

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  • Preparation method and application of lithium ion battery positive electrode material
  • Preparation method and application of lithium ion battery positive electrode material
  • Preparation method and application of lithium ion battery positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Add 3.5L of deionized water into a 10L small water bath container with a stirring device, add 3.5kg of substrate while stirring, and keep the temperature of the water bath at 50°C to obtain the first suspension.

[0046] (2) Pass into the conjugate acid-base pair solution in the first suspension, adjust the pH value to 9.5 ± 0.1, obtain the second suspension liquid, wherein the conjugate acid-base pair solution is 150g / L ammonium bicarbonate solution.

[0047] (3) Dissolve 69.5 g of aluminum nitrate nonahydrate in 600 mL of deionized water to prepare an aluminum nitrate solution. Use deionized water to prepare a sufficient amount of 1 mol / L lithium hydroxide solution. The quality of aluminum nitrate (metal salt) can be calculated according to the target aluminum coating amount of 1300ppm, the aluminum content of aluminum salt and the precipitation rate.

[0048] (4) Pass the aluminum nitrate solution and the lithium hydroxide solution in the step (3) to different ...

Embodiment 2

[0053] The pH values ​​in step (2) and step (4) in Example 1 are all changed to 10.5±0.1, and the rest of the steps are the same as in Example 1.

Embodiment 3

[0055] Except following steps, all the other steps are identical with embodiment 1:

[0056] Step (3) is changed to "add 10% dilute sulfuric acid to 600mL deionized water, adjust the pH of the solution<2, and dissolve 25.0g of titanium sulfate in it", and the flow rate of lithium hydroxide solution in step (4) is changed to 10.3mL / min. The mass of titanium sulfate (metal salt) can be calculated according to the target titanium coating amount of 1300ppm, the titanium content of the titanium salt, and the precipitation rate.

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Abstract

The invention provides a preparation method of a lithium ion battery positive electrode material. The preparation method comprises: mixing a matrix and deionized water under a constant-temperature water bath condition; introducing a conjugated acid-base pair solution, and adjusting the pH value; introducing a metal salt solution and alkali liquor, and adjusting the pH value; carrying out solid-liquid separation to obtain a substrate coated with a reaction precipitate; and carrying out heat treatment on the substrate coated with the reaction precipitate to obtain the lithium ion battery positive electrode material. The invention also provides a lithium ion battery positive electrode material and an electrochemical battery. According to the preparation method of the lithium ion battery positive electrode material, the lithium ion battery positive electrode material and the electrochemical battery provided by the invention, the method is simple and safe to operate and relatively low in cost, the prepared lithium ion battery positive electrode material and the electrochemical battery are relatively good in stability, and the defects of complex process, non-uniform coating and poor product stability in the prior art are overcome.

Description

technical field [0001] The present application relates to the field of battery technology, and in particular to a preparation method of a lithium ion battery positive electrode material, a lithium ion battery positive electrode material prepared by the preparation method, and an electrochemical battery using the lithium ion battery positive electrode material. Background technique [0002] At present, lithium-ion batteries are widely used, and human society has higher and higher requirements for the performance of lithium-ion batteries. There are many systems of cathode materials for lithium-ion batteries. At present, the layered lithium cobalt oxide series (LiCoO 2 ) and ternary materials such as nickel cobalt lithium manganese oxide and nickel cobalt lithium aluminate. Under conditions such as high voltage, high temperature, and high discharge rate, the surface of the positive electrode material is prone to fluoride corrosion and transition metal dissolution. In addition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 王鹏峰魏国祯曾雷英林琳叶耀滨
Owner XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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