Positive electrode active material, secondary battery and method for manufacturing a positive electrode active material

Patent metadata

Field	Value
Publication number	US-2026001778-A1
Application number	US-202519240520-A
Country	US
Kind code	A1
Filing date	Jun 17, 2025
Priority date	Jun 26, 2024
Publication date	Jan 1, 2026
Grant date	—

Abstract

A positive electrode active material of the present disclosure is capable of improving capacity and lifetime of a battery simultaneously, a battery of the present disclosure can have improved capacity and lifetime simultaneously, a method of the present disclosure is able to manufacture a positive electrode active material capable of improving capacity and lifetime of a battery simultaneously.

First claim

What is claimed is:

1 . A positive electrode active material comprising:
a particle comprising a compound represented by the following Chemical Formula 1; and an outer layer surrounding the particle; wherein I003/I104 value of the positive electrode active material is in a range of 0.8 to 1.2, wherein (I102+I006)/(I101) value of the positive electrode active material is in a range of 0.448 to 0.467, and wherein a c-axis length of the positive electrode active material is in a range of 14.1870 Å to 14.1893 Å:

in Chemical Formula 1, 0.9≤a≤1.1, 0.8≤x1.0, 0≤y≤0.5, 0≤z≤0.5, 0<w<0.005, and x+y+z+w=1, and M1 comprises at least one selected from the group consisting of Al, Ti, Zr, Mg, Zn, B, Mo, Fe, Co, Ni, Ba, and W.

2 . The positive electrode active material of claim 1 , wherein the outer layer comprises:
an M2 component distributed on a portion of a surface of the particle; and an M3 component different from the M2 component and distributed on a remaining portion of the surface of the particle; wherein the M2 component comprises at least three selected from the group consisting of Al, Ti, Zr, Mg, Zn, B, Mo, Fe, Co, Ni, Ba, and W, and wherein the M3 component comprises at least one selected from the group consisting of Al, Ti, Zr, Mg, Zn, B, Mo, Fe, Co, Ni, Ba, and W.

3 . The positive electrode active material of claim 2 , wherein the M2 component content is greater than the M3 component content.

4 . The positive electrode active material of claim 2 , wherein the M2 component content is in a range of 0.9 mol % to 1.8 mol %.

5 . The positive electrode active material of claim 2 , wherein the M3 component content is in a range of 0.25 mol % to 0.35 mol %.

6 . The positive electrode active material of claim 2 , wherein the M1 component comprises Zr.

7 . The positive electrode active material of claim 2 , wherein the M2 component comprises Zr, Al, and Ti.

8 . The positive electrode active material of claim 2 , wherein the M3 component comprises B.

9 . A secondary battery comprising:
a positive electrode, a negative electrode, and an electrolyte, wherein the positive electrode comprises a positive electrode active material, and wherein the positive electrode active material comprises: a particle comprising a compound represented by the following Chemical Formula 1; and an outer layer surrounding the particle; wherein I003/I104 value of the positive electrode active material is in a range of 0.8 to 1.2, wherein (I102+I006)/(1101) value of the positive electrode active material is in a range of 0.448 to 0.467, and wherein a c-axis length of the positive electrode active material is in a range of 14.1870 Å to 14.1893 Å:

in Chemical Formula 1, 0.9≤a≤1.1, 0.8≤x1.0, 0≤y≤0.5, 0≤z≤0.5, 0<w<0.005, and x+y+z+w=1, and M1 comprises at least one selected from the group consisting of Al, Ti, Zr, Mg, Zn, B, Mo, Fe, Co, Ni, Ba, and W.

10 . A method for manufacturing a positive electrode active material, the method comprising:
preparing a hydroxide of a transition metal comprising nickel, cobalt, and manganese; sintering a first mixture comprising the transition metal hydroxide, a M1 component precursor, and a lithium compound to obtain a first lithium composite oxide; sintering a second mixture comprising the first lithium composite oxide and a M2 component precursor to obtain a second lithium composite oxide; water-cleaning the second lithium composite oxide; drying the water-cleaned second lithium composite oxide; and heat-treating a third mixture comprising the dried second lithium composite oxide and a M3 component precursor; wherein the M1 component comprises at least one selected from the group consisting of Al, Ti, Zr, Mg, Zn, B, Mo, Fe, Co, Ni, Ba, and W, wherein the M2 component comprises at least three selected from the group consisting of Al, Ti, Zr, Mg, Zn, B, Mo, Fe, Co, Ni, Ba, and W, wherein the M3 component comprises at least one selected from the group consisting of Al, Ti, Zr, Mg, Zn, B, Mo, Fe, Co, Ni, Ba, and W, wherein the M3 component is different from the M2 component, wherein the M3 component precursor content of the third mixture is in a range of 0.25 mol to 0.35 mol with respect to 100 mol of the dried second lithium composite oxide, and wherein the heat-treating of the third mixture is performed at a temperature in a range of 250° C. to 400° C.

11 . The method of claim 10 , wherein the M1 component precursor content of the first mixture is less than 0.5 mol with respect to 100 mol of the transition metal hydroxide.

12 . The method of claim 10 , wherein the M2 component precursor content of the second mixture is in a range of 0.9 mol to 1.8 mol with respect to 100 mol of the first lithium composite oxide.

13 . The method of claim 10 , wherein the M1 component comprises Zr,
wherein the M2 component comprises Zr, Al, and Ti, and wherein the M3 component comprises B.

Assignees

• Ecopro Bm Co Ltd

Inventors

• Jeon Jae Woo
• Kim Hee Young
• Park Jeongmin
• Yun Kyoung Sik
• Kim Ju Chul
• Shin Yongwook
• Bae Mingi
• Nam Gwonsik
• Park Hyeon Mock
• Kim Taeyeong
• Choi Yoon Young

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• C01P2006/40

  Electric properties · CPC title

• C01P2002/74

  by peak-intensities or a ratio thereof only · CPC title

• C01G53/506 Primary

  with the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.8, e.g. Li(MzNixCoyMn1-x-y-z)O2 with x ≥ 0.8 · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title