Cell structure

Patent metadata

Field	Value
Publication number	US-2021066728-A1
Application number	US-201916977156-A
Country	US
Kind code	A1
Filing date	Feb 15, 2019
Priority date	Mar 6, 2018
Publication date	Mar 4, 2021
Grant date	—

Abstract

A cell structure includes a cathode, an anode, and a solid electrolyte layer interposed between the cathode and the anode, the cathode being in the form of a sheet, the anode being in the form of a sheet, the solid electrolyte layer being in the form of a sheet, the solid electrolyte layer being disposed on the anode, the cathode being disposed on the solid electrolyte layer, the cathode having a resistance Rc, the anode and the solid electrolyte layer having a resistance Ra, the resistance Rc and the resistance Ra satisfying a relationship of Rc/Ra≥0.3, the cathode including a first metal oxide having a perovskite crystal structure, the cathode having a thickness larger than 15 μm and equal to or less than 30 μm.

First claim

1 : A cell structure comprising:
a cathode; an anode; and a solid electrolyte layer interposed between the cathode and the anode, the cathode being in the form of a sheet, the anode being in the form of a sheet, the solid electrolyte layer being in the form of a sheet, the solid electrolyte layer being disposed on the anode, the cathode being disposed on the solid electrolyte layer, the cathode having a resistance Rc, the anode and the solid electrolyte layer having a resistance Ra, the resistance Rc and the resistance Ra satisfying a relationship of Rc/Ra≥0.3, the cathode including a first metal oxide having a perovskite crystal structure, the cathode having a thickness larger than 15 μm and equal to or less than 30 μm.

2 : The cell structure according to claim 1 , wherein the first metal oxide is represented by the following formula (1):
A1 1-x B1 x C1 y O 3-δ   formula (1),

where an element A1 is at least one selected from the group consisting of La, Sm, and Ba, an element B1 is at least one selected from the group consisting of Sr and Ca, an element C1 is at least one selected from the group consisting of Fe, Co, Mn, and Ni, 0<x<1, 0<y≤1, and δ represents an oxygen vacancy concentration.

3 : The cell structure according to claim 1 , wherein
the solid electrolyte layer includes a second metal oxide having a perovskite crystal structure, and the second metal oxide is a proton conductor represented by the following formula (2):
A2 m B2 n C2 1-n 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≤m≤1, 0.5≤n<1, and δ represents an oxygen vacancy concentration.

4 : The cell structure according to claim 1 , wherein the solid electrolyte layer has a thickness of 5 μm or more and 30 μm or less.

5 : The cell structure according to claim 1 , wherein the cathode has a thickness of 20 μm or more and 30 μm or less.

Assignees

• Sumitomo Electric Industries

Inventors

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

Classifications

• Y02E60/50

  Fuel cells · CPC title

• H01M2300/0077

  based on zirconium oxide · CPC title

• H01M8/1253 Primary

  the electrolyte containing zirconium oxide · CPC title

• H01M8/1213

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

• H01M4/9033 Primary

  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