Solid oxide fuel cell manufacturing method, solid oxide fuel cell and cell module comprising same

Patent metadata

Field	Value
Publication number	US-2018145337-A1
Application number	US-201615578999-A
Country	US
Kind code	A1
Filing date	Aug 25, 2016
Priority date	Aug 26, 2015
Publication date	May 24, 2018
Grant date	—

Abstract

The present specification relates to a method for manufacturing a solid oxide fuel cell, a solid oxide fuel cell and a cell module including the same.

First claim

1 . A method for manufacturing a solid oxide fuel cell comprising:
preparing a fuel electrode green sheet using fuel electrode slurry including oxygen ion conductive inorganic particles and NiO, or preparing a pellet using a solid including oxygen ion conductive inorganic particles and NiO; bringing a diffuser plate into contact with one surface of the fuel electrode green sheet or the pellet; preparing a fuel electrode by sintering the fuel electrode green sheet or the pellet that the diffuser plate is brought into contact with; separating the diffuser plate from the sintered fuel electrode; and consecutively forming an electrolyte layer and an air electrode on the surface of the sintered fuel electrode from which the diffuser plate is separated.

2 . The method for manufacturing a solid oxide fuel cell of claim 1 , wherein the diffuser plate includes at least one of alumina, zirconia, ceria, and yttria stabilized zirconia.

3 . The method for manufacturing a solid oxide fuel cell of claim 1 , wherein the sintered fuel electrode is a fuel electrode support.

4 . The method for manufacturing a solid oxide fuel cell of claim 3 , wherein the sintered fuel electrode support has a thickness of 100 μm or more and 5 mm or less.

5 . The method for manufacturing a solid oxide fuel cell of claim 1 , wherein an amount of the NiO on a surface of the sintered fuel electrode from which the diffuser plate is separated is 70 parts by weight or less based on 100 parts by weight of an amount of the NiO on a surface opposite to the surface of the sintered fuel electrode from which the diffuser plate is separated.

6 . The method for manufacturing a solid oxide fuel cell of claim 1 , wherein a sintering temperature of the fuel electrode green sheet or the pellet that the diffuser plate is brought into contact with is 1100° C. or more and 1600° C. or less.

7 . The method for manufacturing a solid oxide fuel cell of claim 1 , wherein a sintering time of the fuel electrode green sheet or the pellet that the diffuser plate is brought into contact with is 1 hour or more and 5 hours or less.

8 . The method for manufacturing a solid oxide fuel cell of claim 1 , wherein the oxygen ion conductive inorganic particles include at least one of yttria stabilized zirconia (YSZ: (Y 2 O 3 ) x (ZrO 2 ) 1-x , x=0.05 to 0.15), scandia stabilized zirconia (ScSZ: (Sc 2 O 3 ) x (ZrO 2 ) 1-x , x=0.05 to 0.15), samarium doped ceria (SDC: (Sm 2 O 3 )) x (CeO 2 ) 1-x , x=0.02 to 0.4), gadolinium doped ceria (GDC: (Gd 2 O 3 ) x (CeO 2 ) 1-x , x=0.02 to 0.4), lanthanum strontium manganese oxide (LSM), lanthanum strontium cobalt ferrite (LSCF), lanthanum strontium nickel ferrite (LSNF), lanthanum calcium nickel ferrite (LCNF), lanthanum strontium copper oxide (LSC), gadolinium strontium cobalt oxide (GSC), lanthanum strontium ferrite (LSF), samarium strontium cobalt oxide (SSC), barium strontium cobalt ferrite (BSCF) and lanthanum strontium gallium magnesium oxide (LSGM).

9 . A solid oxide fuel cell consecutively provided with a fuel electrode including an oxygen ion conductive inorganic substance and NiO, an electrolyte layer and an air electrode, wherein an amount of the NiO on a surface of the fuel electrode in contact with the electrolyte layer is 70 parts by weight or less based on 100 parts by weight of an amount of the NiO on a surface opposite to the surface of the fuel electrode in contact with the electrolyte layer.

10 . The solid oxide fuel cell of claim 9 , wherein a mean deviation of the profile (Ra) of the surface of the fuel electrode in contact with the electrolyte layer is 2.2 μm or greater.

11 . A cell module comprising the solid oxide fuel cell of claim 9 as a unit cell.

Assignees

• Lg Chemical Ltd

Inventors

• Heo Yeonhyuk
• Choi Kwangwook
• Shin Dong Oh
• Im Sanghyeok
• Kim Jong Woo

Classifications

• H01M4/8642

  Gradient in composition · CPC title

• H01M8/1226

  characterised by the supporting layer · CPC title

• H01M8/1213

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

• H01M4/8828

  Coating with slurry or ink · CPC title

• H01M8/1246

  the electrolyte consisting of oxides · CPC title