Positive electrode material, preparation method thereof, positive electrode plate, secondary battery, and electric apparatus

Patent metadata

Field	Value
Publication number	US-2025266448-A1
Application number	US-202519192923-A
Country	US
Kind code	A1
Filing date	Apr 29, 2025
Priority date	Dec 16, 2022
Publication date	Aug 21, 2025
Grant date	—

Abstract

A positive electrode material, a preparation method thereof, a positive electrode plate, a secondary battery, and an electric apparatus. The positive electrode material includes positive electrode material particles. The positive electrode material particle includes a matrix and a modifying element, where the matrix includes LiNixCoyMnzO2, where x≥0.8, y≤0.12, and x+y+z=1. The modifying element includes a rare earth element and/or a refractory metal element.

First claim

What is claimed is:

1 . A positive electrode material, comprising positive electrode material particles, wherein the positive electrode material particle comprises a matrix and a modifying element, wherein:
the matrix comprises LiNixCoyMnzO2, wherein x≥0.8, y≤0.12, and x+y+z=1; and the modifying element comprises a rare earth element and/or a refractory metal element.

2 . The positive electrode material according to claim 1 , wherein:
the rare earth element is at least partially located on a surface of the matrix; and/or the refractory metal element is at least partially located in the matrix.

3 . The positive electrode material according to claim 1 , wherein:
the rare earth element comprises at least one of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium; and/or the refractory metal element comprises at least one of titanium, zirconium, niobium, vanadium, molybdenum, and tungsten.

4 . The positive electrode material according to claim 1 , wherein:
the rare earth element is lanthanum; and/or the refractory metal element is niobium.

5 . The positive electrode material according to claim 1 , wherein the modifying element is combined with the matrix through doping.

6 . The positive electrode material according to claim 1 , wherein a doping mass percentage of the modifying element is 1% to 10% given that mass of the positive electrode material is 100%.

7 . The positive electrode material according to claim 1 , wherein a doping mass percentage of the modifying element is 3% to 5% given that mass of the positive electrode material is 100%.

8 . The positive electrode material according to claim 1 , wherein LiNixCoyMnzO2 is a single-crystal particle.

9 . The positive electrode material according to claim 1 , wherein:
D v 50 of LiNixCoyMnzO2 is greater than or equal to 4 μm; and/or SPAN of LiNixCoyMnzO2 is greater than or equal to 1.6.

10 . A preparation method of the positive electrode material according to claim 1 , comprising:
mixing a modifier with LiNixCoyMnzO2, and calcining the mixture to obtain the positive electrode material, wherein:
in LiNixCoyMnzO2, x≥0.8, y≤0.12, and x+y+z=1; and
the modifier comprises a rare earth element and/or a refractory metal element.

11 . The preparation method according to claim 10 , wherein the modifier comprises LiXAYBZO(X+3Y+5Z)/2, LiXAYO(X+3Y)/2, or LiXBZO(X+5Z)/2, X≥5, Y≥3, Z≥2, and X, Y, Z are all integers, wherein A is any one of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium, and B is any one of titanium, zirconium, niobium, vanadium, molybdenum, and tungsten.

12 . The preparation method according to claim 10 , wherein the mixture is calcined at 600° C. to 800° C. for 1 h to 3 h.

13 . A positive electrode plate, comprising the positive electrode material according to claim 1 .

14 . A secondary battery, comprising the positive electrode plate according to claim 13 .

15 . An electric apparatus, comprising the secondary battery according to claim 14 .

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Jin Chao
• Wu Zirui
• Ren Miaomiao
• Ye Yonghuang

Classifications

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01P2002/52

  containing elements as dopants · CPC title

• C01G53/506

  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

• C01G53/42

  containing alkali metals, e.g. LiNiO2 · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title