Anode for solid oxide fuel cell and production method therefor, and method for producing electrolyte layer-electrode assembly for fuel cell

Patent metadata

Field	Value
Publication number	US-10193161-B2
Application number	US-201515526831-A
Country	US
Kind code	B2
Filing date	Jul 21, 2015
Priority date	Nov 21, 2014
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A method for producing an anode capable of increasing output of a solid oxide fuel cell is provided. The method for producing an anode for a solid oxide fuel cell includes a first step of shaping a mixture that contains a perovskite oxide having proton conductivity and a nickel compound and a second step of firing a shaped product, which has been obtained in the first step, in an atmosphere containing 50% by volume or more of oxygen at 1100° C. to 1350° C. so as to generate an anode.

First claim

The invention claimed is:

1. A method for producing an anode for a solid oxide fuel cell, the method comprising:
a first step of shaping a mixture that contains a perovskite oxide having proton conductivity and a nickel compound; and
a second step of firing a shaped product, which has been obtained in the first step, in an atmosphere containing 50% by volume or more of oxygen at 1100° C. to 1350° C. so as to generate an anode.

2. The method for producing an anode for a solid oxide fuel cell according to claim 1 , wherein the perovskite oxide has an AXO 3 crystal structure where A sites contain Ba and X sites contain Ce and Y.

3. The method for producing an anode for a solid oxide fuel cell according to claim 1 , wherein, in the mixture, a volume ratio of the nickel compound to the perovskite oxide is 50/50 to 75/25.

4. The method for producing an anode for a solid oxide fuel cell according to claim 1 , wherein, in the second step, the shaped product is fired in an atmosphere containing 80% by volume or more of oxygen at 1200° C. to 1350° C.

5. The method for producing an anode for a solid oxide fuel cell according to claim 1 , wherein the mixture further contains a binder, and
the method further comprises, after the first step and before the second step, a step of removing the binder by heating the shaped product at a temperature of 450° C. or higher and lower than 800° C.

6. The method for producing an anode for a solid oxide fuel cell according to claim 1 , further comprising, after the first step and before the second step, a step of calcining the shaped product at a temperature of 800° C. or higher and lower than 1100° C.

7. A method for producing an electrolyte layer-electrode assembly for a fuel ell, the electrolyte layer electrode assembly including a solid electrolyte layer and an anode that supports the solid electrolyte layer, the method comprising:
a step A of shaping a mixture of a perovskite oxide having proton conductivity and nickel oxide;
a step B of forming a coating film on one of main surfaces of a shaped product, which has been obtained in the step A, by using a paste that contains a perovskite oxide having proton conductivity; and
a step C of firing the shaped product with the coating film thereon in an atmosphere containing 50% by volume or more of oxygen at 1100° C. to 1350° C. so as to generate the anode from the shaped product and the solid electrolyte layer from the coating film and integrate the anode and the solid electrolyte layer.

Assignees

• Sumitomo Electric Industries

Inventors

• Noda Yohei
• Majima Masatoshi
• Tawarayama Hiromasa
• Mizuhara Naho
• Hiraiwa Chihiro
• Higashino Takahiro

Classifications

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M8/1213

  characterised by the electrode/electrolyte combination or the supporting material · CPC title

• H01M8/12

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

• H01M8/02

  Details (electrodes H01M4/86 - H01M4/98) · CPC title

• H01M4/9025

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