Layered oxide materials for batteries

Patent metadata

Field	Value
Publication number	US-9660263-B2
Application number	US-201414580309-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Dec 23, 2014
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

Materials are presented of the formula:
A x M y M i zi O 2−d , where A is sodium or a mixed alkali metal including sodium as a major constituent;
x>0; M is a metal or germanium; y>0; M i , for i=1, 2, 3 . . . n, is a transition metal or an alkali metal; z i ≧0 for each i=1, 2, 3 . . . n; 0<d≦0.5; the values of x, y, z i and d are such as to maintain charge neutrality; and the values of x, y, z i and d are such that x+y+Σz i >2−d.

The formula includes compounds that are oxygen deficient. Further the oxidation states may or may not be integers i.e. they may be whole numbers or fractions or a combination of whole numbers and fractions and may be averaged over different crystallographic sites in the material. Such materials are useful, for example, as electrode materials in rechargeable battery applications. Also presented is a method of preparing a compound having the formula A x M y M i zi O 2−d .

First claim

The invention claimed is:

1. A composition having the formula A x M y M i zi O 2−d , where
A is sodium or a mixed alkali metal including sodium as a major constituent;
0.76<x≦1;
M is nickel;
y>0;
M i , for i=1, 2, 3 . . . n, is an alkaline earth metal, a transition metal, germanium, or an alkali metal;
z i >0 for each i=1, 2, and 3;
z i ≧0 for each i=4, 5, 6 . . . n;
0<d≦0.5;
the values of x, y, z i and d are such as to maintain charge neutrality; and
the values of x, y, z i and d are such that x+y+Σz i >2−d.

2. A composition as claimed in claim 1 wherein M i , for i=1, 2, 3 . . . n, is selected from the group consisting of: nickel, iron, cobalt, manganese, titanium, aluminium, magnesium and zirconium.

3. An electrode comprising a composition as defined in claim 1 .

4. A composition as claimed in claim 1 wherein M i , for at least one of i=1, 2, 3 . . . n, is titanium.

5. A composition as claimed in claim 4 wherein M i , for at least another one of i=1, 2, 3 . . . n, is magnesium.

6. A composition as claimed in claim 1 wherein M i , for at least one of i=1, 2, 3 . . . n, is cobalt.

7. A composition as claimed in claim 1 wherein M i , for at least one of i=1, 2, 3 . . . n, is germanium.

8. A composition as claimed in claim 1 wherein M i , for at least one of i=1, 2, 3 . . . n, is an alkaline earth metal or an alkali metal.

9. A composition as claimed in claim 1 wherein M i , for i=1 is magnesium, M i , for i=2 is titanium, M i , for i=3 is manganese.

10. A composition as claimed in claim 1 wherein the composition is provided as an O3 layered oxide structure.

Assignees

• Sharp Kk
• Faradion Ltd

Inventors

• Kendrick Emma
• Gruar Robert

Classifications

• C01G53/66

  containing alkaline earth metals, e.g. SrNiO3 or SrNiO2 · CPC title

• C01G49/0027

  containing one alkali metal · CPC title

• C01P2002/20

  Two-dimensional structures · CPC title

• C01G17/00

  Compounds of germanium · CPC title

• H01M4/505

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