High-voltage ternary positive electrode material and preparation method thereof

Patent metadata

Field	Value
Publication number	US-2025079444-A1
Application number	US-202218288685-A
Country	US
Kind code	A1
Filing date	Sep 22, 2022
Priority date	Jul 27, 2022
Publication date	Mar 6, 2025
Grant date	—

Abstract

A high-voltage ternary positive electrode material includes ternary positive electrode active material particles and a flexible coating body, the flexible coating body being coated on surfaces of the ternary positive electrode active material particles; wherein, the flexible coating body includes a mixture of polyaniline and a polyurethane elastomer.

First claim

1 . A high-voltage ternary positive electrode material, comprising ternary positive electrode active material particles and a flexible coating body, the flexible coating body being coated on surfaces of the ternary positive electrode active material particles;
wherein, the flexible coating body comprises a mixture of polyaniline and a polyurethane elastomer.

2 . The high-voltage ternary positive electrode material according to claim 1 , wherein the ternary positive electrode active material is Li 1+x Ni a Co b Mn c O 2 , 1/3≤a≤0.8, 0.1≤b≤1/3, 0.1≤c≤1/3, 0≤x<0.2, and a+b+c=1.

3 . The high-voltage ternary positive electrode material according to claim 1 , wherein the ternary positive electrode active material is LiNi 1/3 Co 1/3 Mn 1/3 O 2 , LiNi 0.4 Co 0.2 Mn 0.4 O 2 , LiNi 0.5 Co 0.2 Mn 0.3 O 2 , LiNi 0.6 Co 0.2 Mn 0.2 O 2 or LiNi 0.8 Co 0.1 Mn 0.1 O 2 .

4 . The high-voltage ternary positive electrode material according to claim 1 , wherein the polyaniline is modified polyaniline doped with phosphotungstic acid.

5 . A preparation method of a high-voltage ternary positive electrode material, used for preparing the high-voltage ternary positive electrode material according to claim 1 , wherein the preparation method of the high-voltage ternary positive electrode material comprises the following steps of:
acquiring a flexible coating; dispersing the flexible coating; and adding the ternary positive electrode active material into the dispersed flexible coating for coating operation, so that surfaces of ternary positive electrode active material particles are coated with a flexible coating body to obtain the high-voltage ternary positive electrode material.

6 . The preparation method of the high-voltage ternary positive electrode material according to claim 5 , wherein acquiring the flexible coating specifically comprises the following steps of:
acquiring aniline; adding polyurethane elastomer into the aniline for dispersion and adhering operations, so that the aniline is adhered to the polyurethane elastomer to obtain a coating liquid; and carrying out in-situ oxidation polymerization operation on the coating liquid to obtain the flexible coating.

7 . The preparation method of the high-voltage ternary positive electrode material according to claim 6 , wherein a mass ratio of the aniline to the polyurethane elastomer is (0.5 to 1.25):1.

8 . The preparation method of the high-voltage ternary positive electrode material according to claim 6 , wherein before the step of adding the polyurethane elastomer into the aniline for dispersion and adhering operations, acquiring the flexible coating specifically further comprises the following step of:
dispersing and mixing the aniline and a phosphotungstic acid.

9 . The preparation method of the high-voltage ternary positive electrode material according to claim 8 , wherein a mass ratio of the aniline to the phosphotungstic acid is 1:(5 to 10).

10 . The preparation method of the high-voltage ternary positive electrode material according to claim 8 , wherein H 2 O 2 is used to carry out the in-situ oxidation polymerization operation on the coating liquid.

11 . A preparation method of a high-voltage ternary positive electrode material, used for preparing the high-voltage ternary positive electrode material according to claim 2 , wherein the preparation method of the high-voltage ternary positive electrode material comprises the following steps of:
acquiring a flexible coating; dispersing the flexible coating; and adding the ternary positive electrode active material into the dispersed flexible coating for coating operation, so that surfaces of ternary positive electrode active material particles are coated with a flexible coating body to obtain the high-voltage ternary positive electrode material.

12 . A preparation method of a high-voltage ternary positive electrode material, used for preparing the high-voltage ternary positive electrode material according to claim 3 , wherein the preparation method of the high-voltage ternary positive electrode material comprises the following steps of:
acquiring a flexible coating; dispersing the flexible coating; and adding the ternary positive electrode active material into the dispersed flexible coating for coating operation, so that surfaces of ternary positive electrode active material particles are coated with a flexible coating body to obtain the high-voltage ternary positive electrode material.

13 . A preparation method of a high-voltage ternary positive electrode material, used for preparing the high-voltage ternary positive electrode material according to claim 4 , wherein the preparation method of the high-voltage ternary positive electrode material comprises the following steps of:
acquiring a flexible coating; dispersing the flexible coating; and adding the ternary positive electrode active material into the dispersed flexible coating for coating operation, so that surfaces of ternary positive electrode active material particles are coated with a flexible coating body to obtain the high-voltage ternary positive electrode material.

Assignees

• Guangdong Brunp Recycling Technology Co Ltd
• Hunan Brunp Recycling Tech Co Ltd

Inventors

• Li Aixia
• Yu Haijun
• Li Changdong
• Xie Yinghao

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/602

  Polymers · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title