Positive electrode for a battery and battery including positive electrode active material

Patent metadata

Field	Value
Publication number	US-10586981-B2
Application number	US-201715647265-A
Country	US
Kind code	B2
Filing date	Jul 12, 2017
Priority date	Sep 26, 2016
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

A positive electrode active material for a battery, the positive electrode active material comprising a compound having a crystal structure of space group Fm-3m and represented by composition formula (1): LixMe1αMe2βO2 . . . (1). In the formula, Me1 represents one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er, Me2 represents one or more elements selected from the group consisting of B, Si, and P, and the following conditions are met: 0<α; 0<β; α+β=y; 0.5≤x/y≤3.0; and 1.5≤x+y≤2.3.

First claim

What is claimed is:

1. A positive electrode active material for a battery, the positive electrode active material comprising a compound having a crystal structure of space group Fm-3m and represented by composition formula (1):
Li x Me1 α Me2 β O 2   (1)

where Me1 represents one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er,
Me2 represents one or more elements selected from the group consisting of B, Si, and P, and the following conditions are met:
0<α;
0<β;
0.5≤x/(α+β)≤3.0; and
1.5≤x+α+β≤2.3.

2. The positive electrode active material according to claim 1 , wherein
Me1 is Mn.

3. The positive electrode active material according to claim 1 , wherein
Me2 is Si.

4. The positive electrode active material according to claim 1 , wherein
x and y satisfy 1.0≤x/(α+β)≤2.0.

5. The positive electrode active material according to claim 1 , wherein
x and y satisfy 1.9≤x+α+β≤2.3.

6. The positive electrode active material according to claim 1 , wherein
α and β satisfy 1<α/β.

7. The positive electrode active material according to claim 6 , wherein α and β satisfy 3<α/β.

8. The positive electrode active material according to claim 7 , wherein α and β satisfy 7≤α/β.

9. The positive electrode active material according to claim 1 , wherein α and β satisfy α/β<21.

10. A battery comprising:
a positive electrode containing a positive electrode active material;
a negative electrode; and
an electrolyte, wherein
the positive electrode active material contains a compound having a crystal structure of space group Fm-3m and represented by composition formula (1):
Li x Me1 α Me2 β O 2   (1)

where Me1 represents one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er,
Me2 represents one or more elements selected from the group consisting of B, Si, and P, and the following conditions are met:
0<α;
0<β;
0.5≤x/(α+β) ≤3.0; and
1.5≤x+α+β≤2.3.

11. The battery according to claim 10 , wherein:
the negative electrode contains a negative electrode active material that stores and releases lithium; and
the electrolyte is a nonaqueous liquid electrolyte.

12. The battery according to claim 10 , wherein:
the negative electrode contains a negative electrode active material that stores and releases lithium; and
the electrolyte is a solid electrolyte.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Ikeuchi Issei
• Natsui Ryuichi
• Nakura Kensuke

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• C01P2002/72

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

• H01M4/505

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

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M2004/028

  Positive electrodes · CPC title