Metal oxide and synthesis of lithium ion battery

Patent metadata

Field	Value
Publication number	US-10944106-B2
Application number	US-201816176702-A
Country	US
Kind code	B2
Filing date	Oct 31, 2018
Priority date	Jun 25, 2018
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

The present application relates to a metal oxide and synthesis of a lithium ion battery. Specifically, the present application selects a cobalt oxide compound, which uses Co 3 O 4 as a main body, as a precursor of lithium cobalt oxide, and anion doping is performed in particles of Co 3 O 4 to obtain a doped precursor for lithium cobalt oxide. The general formula of the precursor can be expressed as Co 3 (O 1-y M y ) 4 , where about 0<y<about 0.2, and wherein the anion M comprises at least one of F, P, S, Cl, N, As, Se, Br, Te, I or At. The lithium ion battery with a cathode made of lithium cobalt oxide material prepared by using the precursor presents good cycle stability in a high voltage charge-discharge environment.

First claim

What is claimed is:

1. A lithium ion battery, comprising a cathode, an anode, a separator and electrolyte, wherein the cathode comprises a lithium cobalt oxide composite prepared by a metal oxide Co 3 (O 1-y M y ) 4 , the general formula of the lithium cobalt oxide composite being LiCo(O 1-y M y ) 2 , wherein the M comprises one of N, P, S, Cl, As, Se, Br, Te, and I, and about 0<y<about 0.2, and wherein a C-axis expansion rate in crystal cell parameters of the lithium cobalt oxide composite is 1.5%, 1.9%, or in a range of 2%-6%.

2. The lithium ion battery according to claim 1 , wherein the median diameter of the lithium cobalt oxide composite is in a range of about 10-35 μm.

3. The lithium ion battery according to claim 1 , wherein about 0.001≤y≤about 0.05.

4. The lithium ion battery according to claim 1 , wherein about 0.005≤y≤about 0.03.

Assignees

• Ningde Amperex Technology Ltd

Inventors

• Chen Pengwei
• Wang Meng
• Xu Leimin
• Wang Liang

Classifications

• C01G51/42

  containing alkali metals, e.g. LiCoO2 · CPC title

• 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

• C01P2004/51

  Particles with a specific particle size distribution · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01P2004/61

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