Positive-electrode active material and battery

Patent metadata

Field	Value
Publication number	US-11569492-B2
Application number	US-202017021468-A
Country	US
Kind code	B2
Filing date	Sep 15, 2020
Priority date	Sep 16, 2015
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A positive-electrode active material contains a compound that has a crystal structure belonging to a space group FM3-M and contains is represented by the composition formula (1) and an insulating compound,LixMeyOαFβ  (1)wherein 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≤2.20.8≤y≤1.31≤α≤2.50.5≤β≤2

First claim

What is claimed is:

1. A positive-electrode active material comprising:
a lithium oxide compound that has a crystal structure belonging to a space group FM-3M and is one of Li 2 MnO 2 F or Li 2 CoO 2 F; and
an insulating compound, wherein:
a mass of the insulating compound ranged from 0.5% to 5% of a mass of the lithium oxide compound,
the insulating compound covers at least part of a surface of the lithium oxide compound, and
the insulating compound is at least one selected from H 3 BO 3 , AlF 3 , Al 2 O 3 , Mn 2 O 3 , Fe 2 O 3 , CuO, NiO, Co 3 O 4 , Eu 2 O 3 , Sm 2 O 3 , and CeO 2 .

2. The positive-electrode active material according to claim 1 , wherein the mass of the insulating compound ranges from 0.5% to 1% of the mass of the lithium oxide compound.

3. The positive-electrode active material according to claim 1 , wherein the insulating compound and at least part of the surface of the lithium oxide compound form a solid solution.

4. The positive-electrode active material according to claim 1 , wherein the lithium oxide compound is Li 2 MnO 2 F.

5. The positive-electrode active material according to claim 1 , wherein the lithium oxide compound is Li 2 CoO 2 F.

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

7. A 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.

8. The positive-electrode active material according to claim 1 , wherein the insulating compound is H 3 BO 3 .

9. The positive-electrode active material according to claim 1 , wherein the insulating compound is A 1 F 3 .

10. The positive-electrode active material according to claim 1 , wherein the insulating compound is A 1 2 O 3 .

11. The positive-electrode active material according to claim 1 , wherein the insulating compound is Mn 2 O 3 .

12. The positive-electrode active material according to claim 1 , wherein the insulating compound is Fe 2 O 3 .

13. The positive-electrode active material according to claim 1 , wherein the insulating compound is CuO.

14. The positive-electrode active material according to claim 1 , wherein the insulating compound is NiO.

15. The positive-electrode active material according to claim 1 , wherein the insulating compound is Co 3 O 4 .

16. The positive-electrode active material according to claim 1 , wherein the insulating compound is Eu 2 O 3 .

17. The positive-electrode active material according to claim 1 , wherein the insulating compound is Sm 2 O 3 .

18. The positive-electrode active material according to claim 1 , wherein the insulating compound is CeO 2 .

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Natsui Ryuichi
• Nakura Kensuke

Classifications

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• C01G53/006

  Chemistry & Metallurgy · mapped topic

• H01M2004/028

  Positive electrodes · CPC title

• C01G51/006

  Chemistry & Metallurgy · mapped topic

• H01M2220/30

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