High-nickel sodium ion positive electrode material and preparation method therefor and battery

Patent metadata

Field	Value
Publication number	US-12091328-B2
Application number	US-202218564772-A
Country	US
Kind code	B2
Filing date	Aug 31, 2022
Priority date	Dec 16, 2021
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

Disclosed are a high-nickel sodium ion cathode material and a preparation method therefor and a battery, wherein a chemical formula of the high-nickel sodium ion cathode material is NaNi a Co b Mn c O 2 ·fCNP—Al/tMVO x , wherein a+b+c=1, 0.5≤a<1, 0<b≤0.25, a/b≥2.5, 0<c≤0.3, 0<t≤0.1, 0<f≤0.1, and M is at least one of sodium, copper, zinc, zirconium or ammonium.

First claim

The invention claimed is:

1. A high-nickel sodium ion cathode material, wherein a chemical formula of the high-nickel sodium ion cathode material is NaNi a Co b Mn c O 2 ·fCNP—Al/tMVO x , wherein a+b+c=1, 0.5≤a<1, 0<b≤0.25, a/b≥2.5, 0<c≤0.3, 0<t≤0.1, 0<f≤0.1, and M is at least one of sodium, copper, zinc, zirconium or ammonium;
wherein MVO x in NaNi a Co b Mn c O 2 ·fCNP—Al/tMVO x is at least one of vanadate, metavanadate or pyrovanadate.

2. The high-nickel sodium ion cathode material according to claim 1 , wherein CNP—Al in NaNi a Co b Mn c O 2 ·fCNP—Al/tMVO x is constituted by mixing a carbon nano powder, an aluminum source and a dispersing agent.

3. The high-nickel sodium ion cathode material according to claim 2 , wherein CNP—Al is prepared by mixing the carbon nano powder with the dispersing agent, then with the aluminum source, and then treating the mixture at 900° C. to 1,300° C. for 3 hours to 12 hours under a protective atmosphere.

4. The high-nickel sodium ion cathode material according to claim 3 , wherein CNP—Al contains Al 4 C 3 .

5. A preparation method for the high-nickel sodium ion cathode material according to claim 1 , comprising the following steps of: mixing a sodium source and carbon nano aluminum with a material of nickel, cobalt and manganese to obtain a mixture, subjecting the mixture to drying and dewatering, first-stage calcination, and annealing, and then mixing with MVO x and performing second-stage calcination on the mixture.

6. The preparation method for the high-nickel sodium ion cathode material according to claim 5 , further comprising, after the second-stage calcination, a step of removing residual sodium from the high-nickel sodium ion cathode material to form a high-nickel sodium ion cathode material coated with sodium salt.

7. The preparation method for the high-nickel sodium ion cathode material according to claim 6 , wherein the step of removing the residual sodium comprises: putting the high-nickel sodium ion cathode material after the second-stage calcination into an alcohol solution, adding a sodium remover, stirring and standing, then performing hydrothermal drying on the mixture to obtain the high-nickel sodium ion cathode material coated with the sodium salt.

8. The preparation method for the high-nickel sodium ion cathode material according to claim 5 , wherein the material of nickel, cobalt and manganese is obtained by recycling a waste ternary lithium battery.

9. A battery, comprising the high-nickel sodium ion cathode material according to claim 1 .

10. A preparation method for the high-nickel sodium ion cathode material according to claim 3 , comprising the following steps of: mixing a sodium source and carbon nano aluminum with a material of nickel, cobalt and manganese to obtain a mixture, subjecting the mixture to drying and dewatering, first-stage calcination, and annealing, and then mixing with MVO x and performing second-stage calcination on the mixture.

11. A preparation method for the high-nickel sodium ion cathode material according to claim 3 , comprising the following steps of: mixing a sodium source and carbon nano aluminum with a material of nickel, cobalt and manganese to obtain a mixture, subjecting the mixture to drying and dewatering, first-stage calcination, and annealing, and then mixing with MVO x and performing second-stage calcination on the mixture.

12. A preparation method for the high-nickel sodium ion cathode material according to claim 4 , comprising the following steps of: mixing a sodium source and carbon nano aluminum with a material of nickel, cobalt and manganese to obtain a mixture, subjecting the mixture to drying and dewatering, first-stage calcination, and annealing, and then mixing with MVO x and performing second-stage calcination on the mixture.

13. The preparation method for the high-nickel sodium ion cathode material according to claim 6 , wherein the material of nickel, cobalt and manganese is obtained by recycling a waste ternary lithium battery.

14. The preparation method for the high-nickel sodium ion cathode material according to claim 7 , wherein the material of nickel, cobalt and manganese is obtained by recycling a waste ternary lithium battery.

15. A battery, comprising the high-nickel sodium ion cathode material according to claim 2 .

16. A battery, comprising the high-nickel sodium ion cathode material according to claim 3 .

17. A battery, comprising the high-nickel sodium ion cathode material according to claim 4 .

Assignees

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

Inventors

• Zhong Yingsheng
• Yu Haijun
• Xie Yinghao
• Li Aixia
• Li Bin
• Li Changdong

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• H01M4/131 Primary

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M10/54

  Reclaiming serviceable parts of waste accumulators · CPC title