Metal oxygen battery and a method for manufacturing oxygen storage material used therein

Patent metadata

Field	Value
Publication number	US-9246163-B2
Application number	US-201314239865-A
Country	US
Kind code	B2
Filing date	Aug 30, 2013
Priority date	Dec 26, 2012
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

Provided is a metal oxygen battery 1 including a positive electrode 2 having oxygen as an active material, a negative electrode 3 having metallic lithium as an active material, and an electrolyte layer 4 interposed between the positive electrode 2 and negative electrode 3 . The positive electrode 2 contains oxygen storage material including mixed crystal of hexagonal composite metal oxide expressed by the general formula A x B y O z (in which, A is one type of metal selected from a group of Y, Sc, La, Sr, Ba, Zr, Au, Ag, Pt, Pd, B is one type of metal selected from a group of Mn, Ti, Ru, Zr, Ni, Cr, and x=1, 1≦y≦2, 1≦z≦7, provided that a case where both A and B are Zr is excluded) and one or more non-hexagonal composite metal oxide expressed by the general formula A x B y O z .

First claim

What is claimed is:

1. A metal oxygen battery, comprising:
a positive electrode to which oxygen is applied as an active material;
a negative electrode to which metallic lithium is applied as an active material; and
an electrolyte layer interposed between the positive electrode and the negative electrode,
wherein the positive electrode contains oxygen storage material including
a mixed crystal of:
hexagonal composite metal oxide expressed by a general formula A x B y O z wherein, A is one type of metal selected from a group consisting of Y, Sc, La, Sr, Ba, Zr, Au, Ag, Pt, Pd, and B is one type of metal selected from a group consisting of Mn, Ti, Ru, Zr, Ni, Cr, and x=1, 1≦y≦2, 1≦z≦7, provided that a case where both A and B are Zr is excluded, and
one or more non-hexagonal composite metal oxide expressed by the general formula A X B Y O Z , wherein the hexagonal composite metal oxide is bonded to the one or more non-hexagonal composite metal.

2. The metal oxygen battery according to claim 1 , wherein the hexagonal composite metal oxide is YMnO 3 , and the non-hexagonal composite metal oxide is one or more type of composite metal oxide selected from a group consisting of orthorhombic YMnO 3 , orthorhombic YMn 2 O 5 , and tetragonal Y 2 Mn 2 O 7 .

3. The metal oxygen battery according to claim 1 , wherein the oxygen storage material includes metal oxide capable of insertion and desorption of lithium ions, and the metal oxide is an oxide of the metal A or an oxide of the metal B.

4. The metal oxygen battery according to claim 1 , wherein the positive electrode, the negative electrode, and the electrolyte layer are disposed in a hermetically sealed case.

5. A method for manufacturing an oxygen storage material including mixed crystal of a plurality of composite metal oxides expressed by a general formula A x B y O z , wherein A is one type of metal selected from a group consisting of Y, Sc, La, Sr, Ba, Zr, Au, Ag, Pt, Pd, and
B is one type of metal selected from a group consisting of Mn, Ti, Ru, Zr, Ni, Cr, and x=1, x=1, 1≦y≦2, 1≦z≦7, provided that a case where both A and B are Zr is excluded,
wherein each of a hexagonal composite metal oxide expressed by the general formula A x B y O z and one or more non-hexagonal composite metal oxide expressed by the general formula A x B y O z is pulverized and mixed, and a mixture obtained is calcined in a temperature range of 600 to 1200° C. for a time range of 1 to 10 hours to obtain a mixed crystal of the hexagonal composite metal oxide and the one or more non-hexagonal composite metal oxide,
wherein the hexagonal composite metal oxide is bonded to the one or more non-hexagonal composite metal oxides.

Assignees

• Honda Motor Co Ltd

Inventors

• Tanaami Kiyoshi
• Saito Bunichi
• Taniuchi Takuya
• Tanaka Akihisa

Classifications

• H01M4/8605

  Porous electrodes · CPC title

• H01M4/8663

  Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/9016

  Oxides, hydroxides or oxygenated metallic salts · CPC title

• H01M4/923

  Compounds thereof with non-metallic elements · CPC title