Positive electrode active material and battery using positive electrode active material

Patent metadata

Field	Value
Publication number	US-10854876-B2
Application number	US-201916278701-A
Country	US
Kind code	B2
Filing date	Feb 18, 2019
Priority date	Nov 15, 2016
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A positive-electrode active material contains a compound represented by the following composition formula (1):

Li x Me y O α X β   (1)
where Me denotes 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, X denotes two or more elements selected from the group consisting of F, Cl, Br, I, N, and S, and x, y, α, and β satisfy 0.75≤x≤2.25, 0.75≤y≤1.50, 1≤α<3, and 0<β≤2, respectively. A crystal structure of the compound belongs to a space group Fm-3 m.

First claim

What is claimed is:

1. A positive-electrode active material comprising a compound represented by a composition formula: Li x Me y O α X β , where:
Me denotes 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;
X denotes two or more elements selected from the group consisting of F, Cl, Br, I, N, and S;
x, y, α, and β satisfy
0.75≤ x≤ 2.25,

0.75≤ y≤ 1.50,

1≤α<3, and

0<β≤2, respectively; and

α and β further satisfy 2.0≤α/β≤5.0,
wherein a crystal structure of the compound belongs to a space group Fm-3m.

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

3. The positive-electrode active material according to claim 1 , wherein Me includes Mn.

4. The positive-electrode active material according to claim 1 , wherein X includes F.

5. The positive-electrode active material according to claim 1 , wherein x and y satisfy 0.5≤x/y≤3.0.

6. The positive-electrode active material according to claim 5 , wherein x and y satisfy 1.17≤x/y≤1.75.

7. The positive-electrode active material according to claim 1 , wherein α satisfies 2.05≤α≤2.8.

8. The positive-electrode active material according to claim 1 , wherein β satisfies 0.2≤β≤1.0.

9. The positive-electrode active material according to claim 1 , wherein x, y, α, and β satisfy 0.67≤(x+y)/(α+β)≤1.15.

10. The positive-electrode active material according to claim 1 , wherein x, y, α, and β satisfy 0.67≤(x+y)/(α+β)≤0.95.

11. A battery comprising:
a positive electrode containing a positive-electrode active material;
a negative electrode; and
an electrolyte,
wherein the positive-electrode active material comprising a compound represented by a composition formula: Li x Me y O α X β , where:
Me denotes 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;
X denotes two or more elements selected from the group consisting of F, Cl, Br, I, N, and S;
x, y, α, and β satisfy
0.75≤ x≤ 2.25,

0.75≤ y≤ 1.50,

1≤α<3, and

0<β≤2, respectively; and

α and β further satisfy 2.0≤α/β≤5.0,
wherein a crystal structure of the compound belongs to a space group Fm-3m.

12. The battery according to claim 11 , wherein the negative electrode contains a negative-electrode active material that stores and releases lithium, and the electrolyte is a non-aqueous electrolyte solution.

13. The battery according to claim 11 , wherein the negative electrode contains a negative-electrode active material that stores and releases lithium, and the electrolyte is a solid electrolyte.

14. A positive-electrode active material comprising a compound represented by a composition formula: Li x Me y O α X β , where:
Me denotes 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;
X denotes two or more elements selected from the group consisting of F, Cl, Br, I, N, and S;
x, y, α, and β satisfy
0.75≤ x ≤2.25,

0.75≤ y≤ 1.50,

1≤α<3, and

0<β≤2, respectively; and

x, y, α, and β further satisfy 0.67≤(x+y)/(α+β)≤0.95,
wherein a crystal structure of the compound belongs to a space group Fm-3m.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Ikeuchi Issei
• 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

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

• H01M4/58

  of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title