Cell, cell stack device, module and module-containing device

Patent metadata

Field	Value
Publication number	US-2016351935-A1
Application number	US-201515114576-A
Country	US
Kind code	A1
Filing date	Jan 29, 2015
Priority date	Jan 29, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

A cell provided with a solid electrolyte layer ( 4 ) made from a ZrO 2 -based sintered member; an inter-connector layer ( 8 ) containing a La-containing perovskite composite oxide, including a pair of end portions of the inter-connector layer ( 8 ) covering a pair of end portions of the solid electrolyte layer ( 4 ); and constituting an annular member with the solid electrolyte layer ( 4 ); an outer electrode layer ( 6 ) disposed outward of the solid electrolyte layer ( 4 ); and an inner electrode layer ( 3 ) disposed inward of the solid electrolyte layer ( 4 ). In such a cell, the solid electrolyte layer ( 4 ) includes a first portion overlapping the pair of end portions of the inter-connector layer ( 8 ), and a second portion disposed between the outer electrode layer ( 6 ) and the inner electrode layer ( 3 ) and having an average thickness of 15 μm or less. Additionally, the first portion is thicker than the second portion.

First claim

1 . A cell comprising:
a solid electrolyte layer made from a ZrO 2 -based sintered member; an inter-connector layer
containing a La-containing perovskite composite oxide;
comprising a pair of end portions of the inter-connector layer covering a pair of end portions of the solid electrolyte layer; and
constituting an annular member with the solid electrolyte layer;
an outer electrode layer disposed outward of the solid electrolyte layer; and an inner electrode layer disposed inward of the solid electrolyte layer, wherein the solid electrolyte layer comprises:
a first portion overlapping the pair of end portions of the inter-connector layer, and
a second portion disposed between the outer electrode layer and the inner electrode layer and having an average thickness of 15 μm or less, and
wherein the first portion is thicker than the second portion.

2 . The cell according to claim 1 , wherein
the first portion is made from a ZrO 2 -based sintered member containing a rare earth element oxide, and comprises: a first layer; and a second layer disposed closer to the inter-connector layer than the first layer, wherein the second layer has a lower rare earth element oxide content than the first layer.

3 . The cell according to claim 2 , wherein
the inter-connector layer contains a rare earth element oxide; and the second layer comprises a near portion adjacent to the inter-connector layer and a far portion less adjacent to the inter-connector layer than the near portion, wherein the near portion contains a greater content of the rare earth element greater than the far portion in a thickness direction.

4 . The cell according to claim 1 , wherein the first portion:
is made from a ZrO 2 -based sintered member containing a rare earth element oxide; and has a greater Zr content in a central portion thereof than in a near portion adjacent to the inter-connector layer in the thickness direction.

5 . The cell according to claim 1 , wherein the first portion has an average thickness of 20 μm or greater.

6 . The cell according to claim 1 , wherein the solid electrolyte layer further comprises
a third portion adjacent to the first portion, not overlapping with the pair of end portions of the inter-connector layer, and having a thickness greater than that of the second portion.

7 . A cell stack device comprising:
a plurality of the cells according to claim 1 ; and current collection members in electrical connection with the plurality of cells.

8 . A module comprising:
the cell stack device according to claim 7 ; and a housing container containing the cell stack device therein.

9 . A module-containing device comprising:
the module according to claim 8 ; an auxiliary device configured to operate the module; and an external case containing the module and the auxiliary device therein.

Assignees

• Kyocera Corp

Inventors

• Iwasaki Kenichi

Classifications

• C25B13/07

  based on ceramics · CPC title

• H01M8/0217 Primary

  Complex oxides, optionally doped, of the type AMO3, A being an alkaline earth metal or rare earth metal and M being a metal, e.g. perovskites · CPC title

• H01M8/2425

  High-temperature cells with solid electrolytes · CPC title

• H01M8/1213 Primary

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

• H01M8/1253

  the electrolyte containing zirconium oxide · CPC title