Method for producing cell structure

Patent metadata

Field	Value
Publication number	US-2019006692-A1
Application number	US-201615752389-A
Country	US
Kind code	A1
Filing date	Aug 5, 2016
Priority date	Aug 17, 2015
Publication date	Jan 3, 2019
Grant date	—

Abstract

A method for producing a cell structure includes: a step of firing a laminated body of a layer containing an anode material and a layer containing a solid electrolyte material, to obtain a joined body of an anode and a solid electrolyte layer; a step of laminating a layer containing a cathode material on a surface of the solid electrolyte layer, and firing the obtained laminated body to obtain a cathode. The anode material contains a metal oxide Ma1 and a nickel compound. The metal oxide Ma1 is a metal oxide having a perovskite structure represented by A1 x1 B1 1-y1 M1 y1 O 3-δ (wherein: A1 is at least one of Ba, Ca, and Sr; B1 is at least one of Ce and Zr; M1 is at least one of Y, Yb, Er, Ho, Tm, Gd, In, and Sc; 0.85≤x1≤0.99; 0<y1≤0.5; and δ is an oxygen deficiency amount).

First claim

1 : A method for producing a cell structure, the method comprising:
a first step of preparing a cathode material, a solid electrolyte material having proton conductivity, and an anode material; a second step of laminating a layer containing the anode material and a layer containing the solid electrolyte material to obtain a first laminated body, and firing the obtained laminated body to form a joined body of an anode and a solid electrolyte layer; and a third step of laminating a layer containing the cathode material on a surface of the solid electrolyte layer to obtain a second laminated body, and firing the obtained second laminated body to form a cathode, wherein the anode material contains a metal oxide Ma1 and a nickel compound, the metal oxide Ma1 contains an element A1, an element B1, an element M1, and oxygen as constituent elements, and the metal oxide Ma1 is a metal oxide having a perovskite structure represented by formula (I):
A1 x1 B1 1-y1 M1 y1 O 3-δ   (I)

(wherein: A1 is at least one element selected from the group consisting of barium, calcium, and strontium; B1 is at least one element selected from the group consisting of cerium and zirconium; M is at least one element selected from the group consisting of yttrium, ytterbium, erbium, holmium, thulium, gadolinium, indium, and scandium; x1 is a number that satisfies 0.85≤x1≤0.99; y1 is a number that satisfies 0<y1≤0.5; and δ is an oxygen deficiency amount).

2 : The method for producing the cell structure according to claim 1 , wherein
in the formula (I), the x1 is a number that satisfies 0.85≤x1≤0.96.

3 : The method for producing the cell structure according to claim 1 , wherein
in the formula (I), the A1 contains barium, the B1 contains zirconium, and the M1 contains yttrium.

4 : A method for producing a cell structure, the method comprising:
a first step of preparing a cathode material, a solid electrolyte material having proton conductivity, and an anode material; a second step of laminating a layer containing the anode material and a layer containing the solid electrolyte material to obtain a first laminated body, and firing the obtained first laminated body to form a joined body of an anode and a solid electrolyte layer; and a third step of laminating a layer containing the cathode material on a surface of the solid electrolyte layer to obtain a second laminated body, and firing the obtained second laminated body to form a cathode, wherein the anode material contains a metal oxide Ma2, a compound Ma3, and a nickel compound, the metal oxide Ma2 contains an element A1, an element B1, an element M1, and oxygen as constituent elements, the metal oxide Ma2 is a metal oxide having a perovskite structure represented by formula (II):
A1 x2 B1 1-y2 M1 y2 O 3-δ   (II)

(wherein: A1 is at least one element selected from the group consisting of barium, calcium, and strontium; B1 is at least one element selected from the group consisting of cerium and zirconium; M1 is at least one element selected from the group consisting of yttrium, ytterbium, erbium, holmium, thulium, gadolinium, indium, and scandium; x2 is a number that satisfies 0.99≤x2≤1; y2 is a number that satisfies 0<y2≤0.5; and δ is an oxygen deficiency amount), and
the compound Ma3 does not contain the element A1 and contains at least one of the element B1 and the element M1.

5 : The method for producing the cell structure according to claim 4 , wherein
in the formula (II), the A1 contains barium, the B1 contains zirconium, the M1 contains yttrium, and the compound Ma3 contains zirconium dioxide doped with yttrium.

6 : The method for producing the cell structure according to claim 1 , further comprising a fourth step of disposing an oxidant passage for supplying an oxidant to the cathode and disposing a fuel passage for supplying fuel to the anode, after the third step.

7 : The method for producing the cell structure according to claim 4 , further comprising a fourth step of disposing an oxidant passage for supplying an oxidant to the cathode and disposing a fuel passage for supplying fuel to the anode, after the third step.

Assignees

• Sumitomo Electric Industries
• Univ Kyoto

Inventors

• Higashino Takahiro
• Miyamoto Kazunari
• Noda Yohei
• Hiraiwa Chihiro
• Mizuhara Naho
• Tawarayama Hiromasa
• Takeuchi Hisao
• Majima Masatoshi
• Uda Tetsuya
• Han Donglin

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

• H01M4/9033

  Complex oxides, optionally doped, of the type M1MeO3, M1 being an alkaline earth metal or a rare earth, Me being a metal, e.g. perovskites · CPC title

• H01M8/0258

  characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant · CPC title

• H01M8/1253 Primary

  the electrolyte containing zirconium oxide · CPC title