Solid oxide fuel cell manufacturing method for solid oxide fuel cell

Patent metadata

Field	Value
Publication number	US-2016172684-A1
Application number	US-201514957017-A
Country	US
Kind code	A1
Filing date	Dec 2, 2015
Priority date	Dec 10, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

The invention provides a solid oxide fuel cell having a cathode which uses a material that exhibits minimal variation in the linear expansion coefficient and has superior conductivity and catalytic activity, and also provides a manufacturing method for the solid oxide fuel cell. The solid oxide fuel cell has single fuel cells comprising an anode, a solid electrolyte membrane and a cathode, wherein at least a portion of the cathode comprises a perovskite oxide represented by La y (Ni 1-x Fe x )O 3 (wherein 0.1≦x≦0.5 and 0.95≦y<1) as the main component.

First claim

1 . A solid oxide fuel cell having a single fuel cell comprising an anode, a solid electrolyte membrane and a cathode, wherein
at least a portion of the cathode comprises a perovskite oxide represented by La y (Ni 1-x Fe x )O 3 (wherein 0.1≦x≦0.5 and 0.95≦y<1) as a main component.

2 . The solid oxide fuel cell according to claim 1 , wherein
the cathode comprises a cathode intermediate layer formed on the solid electrolyte membrane, and a cathode conductive layer formed on the cathode intermediate layer, and the cathode conductive layer comprises the perovskite oxide as a main component.

3 . The solid oxide fuel cell according to claim 2 , wherein
the cathode intermediate layer comprises, as a main component, a ceria compound represented by Ln 1-z Ce z O 2 (wherein Ln represents any one of Sm, Gd and La, and when Ln represents Sm or Gd, z satisfies 0.8≦z≦0.9, and when Ln represents La, z satisfies 0.5≦z≦0.8).

4 . A manufacturing method for a solid oxide fuel cell having a single fuel cell comprising an anode, a solid electrolyte membrane and a cathode, the manufacturing method comprising:
a step of forming the anode and the solid electrolyte membrane, and a step of forming the cathode on the solid electrolyte membrane, wherein the step of forming the cathode comprises a step of applying a slurry containing a perovskite oxide represented by La y (Ni 1-x Fe x )O 3 (wherein 0.1≦x≦0.5 and 0.95≦y<1) as a main component for at least a portion of the cathode.

5 . The manufacturing method for a solid oxide fuel cell according to claim 4 , wherein
the step of forming the cathode comprises a step of forming a cathode intermediate layer on the solid electrolyte membrane, and a step of forming a cathode conductive layer on the cathode intermediate layer, and the step of forming the cathode conductive layer comprises a step of applying a slurry containing the perovskite oxide as a main component.

6 . The manufacturing method for a solid oxide fuel cell according to claim 5 , wherein
in the step of forming the cathode intermediate layer, a slurry containing a ceria compound represented by Ln 1-z Ce z O 2 (wherein Ln represents any one of Sm, Gd and La, and when Ln represents Sm or Gd, z satisfies 0.8≦z≦0.9, and when Ln represents La, z satisfies 0.5≦z≦0.8) as a main component is applied to the solid electrolyte membrane.

Assignees

• Mitsubishi Hitachi Power Sys

Inventors

• Hiwatashi Kenichi
• Yoshida Shin
• Tsukuda Hiroshi

Classifications

• H01M4/8673 Primary

  Electrically conductive fillers · CPC title

• H01M8/1213

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

• H01M2300/0074

  Ion conductive at high temperature · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M4/881

  Electrolytic membranes · CPC title