Use of aluminum in a lithium rich cathode material for suppressing gas evolution from the cathode material during a charge cycle and for increasing the charge capacity of the cathode material

Patent metadata

Field	Value
Publication number	US-11489158-B2
Application number	US-201816955029-A
Country	US
Kind code	B2
Filing date	Dec 18, 2018
Priority date	Dec 18, 2017
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

Use of aluminum in a lithium rich cathode material of the general formula (I) for suppressing gas evolution from the cathode material during a charge cycle and for increasing the charge capacity of the cathode material.

First claim

The invention claimed is:

1. A method comprising:
suppressing gas evolution from a cathode material during a charge cycle by incorporating an aluminium doped lithium rich cathode material of the general formula:

Li

(

4
3

-

2
⁢
x

3

-

y
3

-

z
3

)

⁢

Ni
x

⁢

Co
y

⁢

Al
z

⁢

Mn

(

2
3

-

x
3

-

2
⁢
y

3

-

2
⁢
z

3

)

⁢

O
2

,

wherein x is equal to or greater than 0.375 and equal to or less than 0.55.

2. The method of claim 1 , wherein the gas is molecular oxygen and/or carbon dioxide.

3. The method of claim 1 , y is equal to or greater than 0.025 and equal to or less than 0.325; and z is equal to or greater than 0.025 and equal to or less than 0.075.

4. The method of claim 1 , wherein x+y+z is equal to or less than 0.7.

5. The method of claim 1 , wherein x+y+z is equal to or greater than 0.375 and equal to or less than 0.7.

6. The method of claim 1 , wherein y is 0.3, x has a value equal to 0.375, and z has a value equal to 0.05.

7. The method of claim 1 , wherein when y is 0.325, x has a value equal to 0.375, and z has a value equal to 0.025.

8. The method of claim 1 , wherein the cathode material has a layered structure.

9. The method of claim 8 , wherein the layered structure is expressed as the general formula:
(1- a - b - c )Li 2 MnO 3 .a LiCoO 2 .b LiNi 0.5 Mn 0.5 O 2 .c LiAlO 2
wherein a is equal to y;
b is equal to 2x; and
c is equal to z.

10. The method of claim 9 , wherein the cathode material is
0.4Li 2 MnO 3 .0.15LiCoO 2 .0.4LiNi 05 Mn 0.5 O 2 .0.05LiAlO 2 .

11. The method of claim 9 , wherein the cathode material is 0.45Li 2 MnO 3 .0.1LiCoO 2 .0.4LiNi 0.5 Mn 0.5 O 2 .0.05LiAlO 2 .

12. The method of claim 1 , wherein the cathode material is 0.4Li 2 MnO 3 .0.15LiCoO 2 .0.4LiNi 0.5 Mn 0.5 O 2 .0.05LiAlO 2 .

13. The method of claim 1 , wherein the cathode material is 0.45Li 2 MnO 3 .0.1LiCoO 2 .0.4LiNi 0.5 Mn 0.5 O 2 .0.05LiAlO 2 .

14. A method comprising:
increasing charge capacity of a cathode material by incorporating an aluminium doped lithium rich cathode material of the general formula:

Li

(

4
3

-

2
⁢
x

3

-

y
3

-

z
3

)

⁢

Ni
x

⁢

Co
y

⁢

Al
z

⁢

Mn

(

2
3

-

x
3

-

2
⁢
y

3

-

2
⁢
z

3

)

⁢

O
2

,

wherein x is equal to or greater than 0.375 and equal to or less than 0.55.

15. The method of claim 14 , y is equal to or greater than 0.025 and equal to or less than 0.325; and z is equal to or greater than 0.025 and equal to or less than 0.075.

16. The method of claim 15 , wherein x is equal to or greater than 0.375 and equal to or less than 0.55.

17. The method of claim 14 , wherein x+y+z is equal to or less than 0.7.

18. The method of claim 14 , wherein x+y+z is equal to or greater than 0.375 and equal to or less than 0.7.

19. The method of claim 14 , wherein the cathode material has a layered structure.

20. The method of claim 19 , wherein the layered structure is expressed as the general formula:
(1- a - b - c )Li 2 MnO 3 .a LiCoO 2 .b LiNi 0.5 Mn 0.5 O 2 .c LiAlO 2
wherein a is equal to y;
b is equal to 2x; and
c is equal to z.

Assignees

• Dyson Technology Ltd

Inventors

• Roberts Matthew Robert
• Bruce Peter George
• Kinyanjui Francis Gachau

Classifications

• H01M4/525 Primary

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

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2002/20

  Two-dimensional structures · CPC title

• H01M4/505

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

• H01M10/052

  Li-accumulators · CPC title