Electrolyte layer-anode composite member and cell structure

Patent metadata

Field	Value
Publication number	US-2021013534-A1
Application number	US-201916977235-A
Country	US
Kind code	A1
Filing date	Feb 14, 2019
Priority date	Mar 6, 2018
Publication date	Jan 14, 2021
Grant date	—

Abstract

An electrolyte layer-anode composite member includes an anode including a first metal oxide having a perovskite crystal structure, and a solid electrolyte layer including a second metal oxide having a perovskite crystal structure, the anode including at least one of nickel and a nickel compound, the anode having a sheet-like shape, the solid electrolyte layer having a sheet-like shape, the solid electrolyte layer being stacked on the anode, the anode having a thickness Ta of 850 μm or more. The thickness Ta of the anode and a thickness Te of the solid electrolyte layer may satisfy a relation of 0.003≤Te/Ta≤0.036. The thickness Ta of the anode and a diameter Da of the anode may satisfy a relation of 55≤Ta/Da≤300.

First claim

1 . An electrolyte layer-anode composite member comprising:
an anode including a first metal oxide having a perovskite crystal structure; and a solid electrolyte layer including a second metal oxide having a perovskite crystal structure, the anode including at least one of nickel and a nickel compound, the anode having a sheet-like shape, the solid electrolyte layer having a sheet-like shape, the solid electrolyte layer being stacked on the anode, the anode having a thickness Ta of 850μm or more.

2 . The electrolyte layer-anode composite member according to claim 1 , wherein the first metal oxide is represented by the following formula (1):
A1 m B1 n C1 1-n O 3-δ   formula (1),

where an element A1 is at least one selected from the group consisting of Ba, Ca, and Sr, an element B1 is at least one selected from the group consisting of Ce and Zr, an element C1 is at least one selected from the group consisting of Y, Yb, Er, Ho, Tm, Gd, In, and Sc, 0.85≤m≤1, 0.5≤n<1, and δ represents an oxygen vacancy concentration.

3 . The electrolyte layer-anode composite member according to claim 1 , wherein the second metal oxide is represented by the following formula (2):
A2 x B2 y C2 1-y O 3-δ   formula (2),

where an element A2 is at least one selected from the group consisting of Ba, Ca, and Sr, an element B2 is at least one selected from the group consisting of Ce and Zr, an element C2 is at least one selected from the group consisting of Y, Yb, Er, Ho, Tm, Gd, In, and Sc, 0.85≤x≤1, 0.5≤y<1, and δ represents an oxygen vacancy concentration.

4 . The electrolyte layer-anode composite member according to claim 1 , wherein the thickness Ta of the anode and a thickness Te of the solid electrolyte layer satisfy a relation of 0.003≤Te/Ta≤0.036.

5 . The electrolyte layer-anode composite member according to claim 1 , wherein a thickness Te of the solid electrolyte layer is 5μm or more and 30μm or less.

6 . The electrolyte layer-anode composite member according to claim 1 , wherein
the anode has a circular sheet-like shape, and the thickness Ta of the anode and a diameter Da of the anode satisfy a relation of 55≤Ta/Da≤300.

7 . The electrolyte layer-anode composite member according to claim 6 , wherein the diameter Da of the anode is 5 cm or more and 15 cm or less.

8 . The electrolyte layer-anode composite member according to claim 1 , wherein the thickness Ta of the anode is 1500μm or less.

9 . A cell structure comprising:
the electrolyte layer-anode composite member according to claim 1 ; and a cathode, the cathode having a sheet-like shape, the cathode being stacked on the solid electrolyte layer of the electrolyte layer-anode composite member.

Assignees

• Sumitomo Electric Industries

Inventors

• Hiraiwa Chihiro
• Mizuhara Naho
• Ogawa Mitsuyasu
• Tawarayama Hiromasa
• Higashino Takahiro
• Majima Masatoshi

Classifications

• Y02E60/50

  Fuel cells · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M2300/0074

  Ion conductive at high temperature · CPC title

• H01M8/1246

  the electrolyte consisting of oxides · CPC title

• H01M8/1231

  with both reactants being gaseous or vaporised · CPC title