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A kind of positive electrode material, its preparation method and application

A technology of positive electrode materials and matrix materials, applied in the field of battery materials, can solve the problems of poor stability and safety of ternary positive electrodes, and achieve the effects of low cost, enhanced stability, improved electrochemical performance and safety performance

Active Publication Date: 2021-12-03
LANGFANG GREEN IND TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem of poor stability and safety of ternary cathode materials in the prior art, one of the objects of the present invention is to provide a cathode material, which includes a matrix material and carbon quantum particles arranged on the surface of the matrix material. dots and oxide quantum dots

Method used

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  • A kind of positive electrode material, its preparation method and application
  • A kind of positive electrode material, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A kind of preparation method of cathode material comprises the steps:

[0059] (1) be 0.04mol / L by the molar concentration of citric acid, the molar concentration of zirconium citrate is 0.02mol / L, citric acid, zirconium citrate and ethanol are mixed, obtain mixed solution;

[0060] (2) Press LiNi 0.9 co 0.05 mn 0.05 o 2 The ratio to the total mass of citric acid and zirconium citrate is 100, and LiNi is added in the mixed solution 0.9 co 0.05 mn 0.05 o 2 , to obtain the precursor solution;

[0061] (3) The precursor solution was subjected to microwave treatment with a power of 1500W, and treated at 200° C. in an oxygen atmosphere for 25 minutes to obtain a positive electrode material.

Embodiment 2

[0063] The difference with Example 1 is that the molar concentration of citric acid in step (1) is 0.01mol / L.

Embodiment 3

[0065] The difference from Example 1 is that the molar concentration of citric acid in step (1) is 0.1mol / L.

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Abstract

The invention relates to a positive electrode material, its preparation method and application. The positive electrode material includes a matrix material and carbon quantum dots and oxide quantum dots arranged on the surface of the matrix material. The preparation method of the positive electrode material comprises the following steps: (1) mixing a carbon source, a metal salt and a solvent to obtain a mixed solution; (2) adding a matrix material to the mixed solution to obtain a precursor solution; (3) mixing The precursor solution is subjected to microwave treatment to obtain the positive electrode material. The present invention uses carbon quantum dots and oxide quantum dots to modify the surface of the base material. Compared with the full coverage coating in the prior art, the coating amount of the present invention is less, and has less influence on the specific capacity of the base material, and The cost is lower.

Description

technical field [0001] The invention belongs to the technical field of battery materials, and in particular relates to a positive electrode material, a preparation method and an application thereof. Background technique [0002] In recent years, the development of lithium-ion batteries is mainly directed towards high energy density and high power density. The nickel-cobalt-manganese ternary cathode material combines the high capacity and low cost of lithium nickelate, the high compaction of lithium cobaltate, and the high safety and high stability of lithium manganate, and has been extensively studied. [0003] At present, the main factor restricting the development of nickel-cobalt-manganese ternary cathode materials, especially the development of high-nickel ternary cathode materials is safety issues. Due to the high alkali content on the surface of nickel-cobalt-manganese ternary cathode materials, it is easy to cause battery flatulence, leakage and other safety issues. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/362H01M4/485H01M4/505H01M4/525H01M4/62H01M4/624H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 谭强强王鹏飞
Owner LANGFANG GREEN IND TECH CENT
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