Positive-electrode active material and battery

Patent metadata

Field	Value
Publication number	US-11637277-B2
Application number	US-202017028424-A
Country	US
Kind code	B2
Filing date	Sep 22, 2020
Priority date	Jul 23, 2015
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

A positive-electrode active material containing a compound that has a crystal structure belonging to the space group FM-3M and is represented by the composition formula (1):LixMeyOαFβ  (1)wherein Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, and Al, and the following conditions are satisfied.1.3≤x≤2.2,0.8≤y≤1.3,1≤α≤2.93,0.07≤β≤2.

First claim

What is claimed is:

1. A positive-electrode active material comprising a compound that has a crystal structure belonging to a space group FM-3M and is represented by the composition formula (1):
Li x Me y O α F β   (1)

wherein Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, and Al, and the following conditions are satisfied,
1.3≤x≤2.2,
0.8≤y≤1.3,
1≤α≤2.93,
0.07≤β≤2, and
1.5≤(4y−β)/α≤2.2.

2. The positive-electrode active material according to claim 1 , satisfying 0.8≤(x+y)/(α+β)≤1.

3. The positive-electrode active material according to claim 2 , satisfying 2.5/3≤(x+y)/(α+β)≤2.6/3.

4. The positive-electrode active material according to claim 1 , satisfying 2.83<{2α+β−(3−y)}/y≤3.50.

5. The positive-electrode active material according to claim 1 , wherein Me denotes one element selected from the group consisting of Mn, Co, Ni, and Fe, a solid solution composed of Ni, Co, and Mn, a solid solution composed of Ni, Co, and Al, a solid solution composed of Mn and Co, or a solid solution composed of Mn and Ni.

6. The positive-electrode active material according to claim 1 , satisfying 1.79≤x≤2.18.

7. The positive-electrode active material according to claim 6 , satisfying 1.89≤x≤2.

8. The positive-electrode active material according to claim 1 , satisfying 0.5≤β≤2.

9. The positive-electrode active material according to claim 8 , satisfying 0.79≤β≤1.

10. A battery comprising:
a positive electrode containing the positive-electrode active material according to claim 1 ;
a negative electrode; and
an electrolyte.

11. The battery according to claim 10 , wherein the positive electrode has a positive-electrode active material layer containing 50 wt % or more of the positive-electrode active material.

12. The battery according to claim 10 , wherein the negative electrode contains a negative-electrode active material with lithium adsorption and desorption characteristics, and the electrolyte is a non-aqueous electrolyte solution.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Natsui Ryuichi
• Nakura Kensuke

Classifications

• C01G53/82

  Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01G51/82

  Compounds containing cobalt, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01G45/22 Primary

  Compounds containing manganese, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01P2002/76

  by a space-group or by other symmetry indications · CPC title

• H01M10/052

  Li-accumulators · CPC title