Positive-electrode active material and battery

Patent metadata

Field	Value
Publication number	US-10497928-B2
Application number	US-201715811683-A
Country	US
Kind code	B2
Filing date	Nov 14, 2017
Priority date	Sep 16, 2015
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A positive-electrode active material contains a compound that has a crystal structure belonging to the space group FM3-M and that 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 B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, and solid solutions thereof, and the following conditions are satisfied.

1.8≤ x≤ 2.2

0.8≤ y≤ 1.3

1.2≤α≤2.5

0.5≤β≤1.8

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 FM3-M and is represented by the composition formula (1):
Li x Me y O α F β   (1)

wherein Me denotes a solid solution composed of Co and Mo, a solid solution composed of Ni and Mo, a solid solution composed of Mn and Mo, a solid solution composed of Co and Nb, a solid solution composed of Ni and Nb, or a solid solution composed of Mn and Nb, and the following conditions are satisfied
1.8≤ x≤ 2.2

0.8≤ y≤ 1.3

1.2≤α≤2.5

0.5≤β≤1.8.

2. The positive-electrode active material according to claim 1 , containing the compound as a main component.

3. The positive-electrode active material according to claim 1 , satisfying x+y=α—β=3.

4. A positive-electrode active material comprising a compound that has a crystal structure belonging to a space group FM3-M and the compound is Li 2 Co 0.8 Mo 0.2 O 2 F, Li 2 Mn 0.8 Mo 0.2 O 2 F, Li 2 Mn 0.8 Mo 0.2 O 2 F, Li 2 Co 0.8 Nb 0.2 O 2 F, Li 2 Ni 0.8 Nb 0.2 O 2 F, or Li 2 Mn 0.8 Nb 0.2 O 2 F.

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

6. The battery according to claim 5 , 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.

7. The battery according to claim 5 , wherein the compound is Li 2 Co 0.8 Mo 0.2 O 2 F, Li 2 Ni 0.8 Mo 0.2 O 2 F, Li 2 Mn 0.8 Mo 0.2 O 2 F, Li 2 Co 0.8 Nb 0.2 O 2 F, Li 2 Ni 0.8 Nb 0.2 O 2 F, or Li 2 Mn 0.8 Nb 0.2 O 2 F.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Asano Kazuko
• Natsui Ryuichi
• Nakura Kensuke

Classifications

• C01P2006/40

  Electric properties · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M4/505

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

• H01M4/1315 Primary

  containing halogen atoms, e.g. LiCoOxFy · CPC title