Electrode catalyst material, fuel cell electrode, method for producing electrode catalyst material, and fuel cell

Patent metadata

Field	Value
Publication number	US-2016248101-A1
Application number	US-201414913395-A
Country	US
Kind code	A1
Filing date	May 15, 2014
Priority date	Aug 30, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

Provided is an electrode catalyst material that has an increased reduction rate of a nickel catalyst and thus an improved catalytic function in a fuel cell. The electrode catalyst material for fuel cells contains nickel oxide and cobalt oxide. The electrode catalyst material contains a cobalt metal component in an amount of 2 to 15 mass % with respect to the total mass of a nickel metal component and the cobalt metal component.

First claim

1 . An electrode catalyst material for solid oxide fuel cells, comprising nickel oxide and cobalt oxide,
wherein the electrode catalyst material contains a cobalt metal component in an amount of 2 to 15 mass % with respect to the total mass of a nickel metal component and the cobalt metal component.

2 . The electrode catalyst material according to claim 1 , comprising a structure in which cobalt oxide particles are dispersedly supported on a partial or entire surface of nickel oxide particles.

3 . The electrode catalyst material according to claim 1 , comprising 50% or more of Ni—Co oxide composite particles having particle sizes of 1 μm to 50 μm.

4 . A fuel cell electrode formed by using the electrode catalyst material according to claim 1 .

5 . The fuel cell electrode according to claim 4 , wherein a reduction rate of the Ni component is 95% or more.

6 . A method for producing an electrode catalyst material for fuel cells that contains nickel oxide and cobalt oxide, the method comprising:
a step of adding the cobalt oxide to the nickel oxide by an impregnation method in such a manner that the electrode catalyst material contains a cobalt metal component in an amount of 2 to 15 mass % with respect to the total amount of a nickel metal component and the cobalt metal component.

7 . An electrode catalyst material for fuel cells, comprising nickel oxide and iron oxide,
wherein the electrode catalyst material contains an iron metal component in an amount of 2 to 10 mass % with respect to the total mass of a nickel metal component and the iron metal component.

8 . A method for producing an electrode catalyst material for fuel cells that contains nickel oxide and iron oxide, the method comprising:
a step of adding the iron oxide to the nickel oxide by an impregnation method in such a manner that the electrode catalyst material contains an iron metal component in an amount of 2 to 10 mass % with respect to the total amount of a nickel metal component and the iron metal component.

9 . A fuel cell electrode formed by using the electrode catalyst material according to claim 7 .

10 . The fuel cell electrode according to claim 9 , wherein a reduction rate of the Ni component is 95% or more.

11 . A fuel cell comprising an electrode formed by using the electrode catalyst material according to claim 1 .

12 . A fuel cell comprising an electrode formed by using the electrode catalyst material according to claim 7 .

Assignees

• Sumitomo Electric Industries

Inventors

• Hiraiwa Chihiro
• Mizuhara Naho
• Majima Masatoshi
• Higashino Takahiro
• Tominaga Aiko
• Iihara Junji

Classifications

• H01M8/12

  operating at high temperature, e.g. with stabilised ZrO2 electrolyte · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M4/8657

  layered · CPC title

• H01M4/9025 Primary

  Oxides specially used in fuel cell operating at high temperature, e.g. SOFC · CPC title

• H01M4/8652

  as mixture · CPC title