Positive-electrode active material and battery

Patent metadata

Field	Value
Publication number	US-10811671-B2
Application number	US-201715811684-A
Country	US
Kind code	B2
Filing date	Nov 14, 2017
Priority date	Sep 16, 2015
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A positive-electrode active material contains a compound that has a crystal structure belonging to a space group FM3-M and that is represented by the composition formula (1):

Li x A y Me z O α F β   (1)
wherein A denotes Na or K, Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr, and the following conditions are satisfied.

1.7≤ x+y ≤2.2

0≤ y ≤0.2

0.8≤ z ≤1.3

1≤α≤2.5

0.5≤β≤2

First claim

What is claimed is:

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

wherein A denotes Na or K,
Me denotes one element selected from the group consisting of Mn and Co, and the following conditions are satisfied:
1.7≤x+y≤2.2,
0<y≤0.2,
0.8≤z≤1.3,
1≤α≤2.5, and
0.5≤β≤2.

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

3. The positive-electrode active material according to claim 1 , satisfying 0<y≤1.

4. The positive-electrode active material according to claim 1 , satisfying
1.8≤x≤1.99, and
0.01≤y≤0.2.

5. The positive-electrode active material according to claim 1 , satisfying z=1, α=2, and β=1.

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

7. The battery according to claim 6 , 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

• 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

• C01P2006/40

  Electric properties · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2002/76

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