Method for manufacturing solid oxide fuel cell

Patent metadata

Field	Value
Publication number	US-2017237103-A1
Application number	US-201515518503-A
Country	US
Kind code	A1
Filing date	Nov 5, 2015
Priority date	Nov 18, 2014
Publication date	Aug 17, 2017
Grant date	—

Abstract

According to the present disclosure, a pattern comprising protrusions and grooves is formed on all layers in a laminate laminating a composition layer for preparing an electrolyte; and at least one of a composition layer for preparing a fuel electrode and a composition layer for preparing an air electrode on the composition layer for preparing an electrolyte, which leads to advantages of saving time and costs in terms of process by carrying out sintering and pattern forming at once, while improving cell efficiency by increasing a surface area of the electrolyte layer.

First claim

1 . A method for manufacturing a solid oxide fuel cell comprising:
preparing a laminate laminating a composition layer for preparing an electrolyte, and at least one of a composition layer for preparing a fuel electrode and a composition layer for preparing an air electrode on the composition layer for preparing an electrolyte; and forming a pattern comprising protrusions and grooves on all the composition layers in the laminate using a porous plate while simultaneously sintering each of the composition layers of the laminate.

2 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein a shape of the pattern formed in the sintering and the pattern forming is a wave pattern shape on a section in a thickness direction of the laminate.

3 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein the laminate comprises a form of laminating the composition layer for preparing the electrolyte; the composition layer for preparing the fuel electrode provided on one surface of the composition layer for preparing the electrolyte; and the composition layer for preparing the air electrode provided on a surface opposite to a surface of the composition layer for preparing the electrolyte provided with the composition layer for preparing the fuel electrode.

4 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein the composition layer for preparing a fuel electrode comprises a composition layer for preparing a fuel electrode support layer and a composition layer for preparing a fuel electrode functional layer, and the composition layer for preparing the fuel electrode functional layer is provided between the composition layer for preparing the fuel electrode support layer and the composition layer for preparing the electrolyte.

5 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein the composition layer for preparing the air electrode comprises a composition layer for preparing an air electrode support layer and a composition layer for preparing an air electrode functional layer, and the composition layer for preparing the air electrode functional layer is provided between the composition layer for preparing the air electrode support layer and the composition layer for preparing the electrolyte.

6 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein the sintering and the pattern forming comprises providing the laminate between two of the porous plates, and sintering the laminate, and removing the porous plates.

7 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein, in the sintering and the pattern forming, the sintering temperature is 800° C. or more and 1600° C. or less.

8 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein the porous plate is provided with an engraved portion or an opening portion.

9 . The method for manufacturing the solid oxide fuel cell of claim 8 , wherein, in a direction vertical to a thickness direction of the laminate, a section of the engraved portion is polygon, circle or oval, and a vertical section of the opening portion is polygon, circle or oval.

10 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein thicknesses of the electrolyte layer on the parts provided with protrusions and the parts provided with grooves are 10 μm or more and 50 μm or less.

11 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein the electrolyte layer has a Ra value of 1 μm or more and 5 μm or less.

12 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein the laminate comprises a form of laminating the composition layer for preparing the electrolyte; and the composition layer for preparing the fuel electrode provided on the composition layer for preparing the electrolyte, and
after the sintering and the pattern forming, the method further comprises forming an air electrode layer on a surface opposite to a surface of the sintered electrolyte layer provided with the fuel electrode.

13 . The method for manufacturing the solid oxide fuel cell of claim 1 , wherein the laminate comprises a form of laminating the composition layer for preparing the electrolyte; and the composition layer for preparing the air electrode provided on the composition layer for preparing the electrolyte, and
after the sintering and the pattern forming, the method further comprises forming a fuel electrode layer on a surface opposite to a surface of the sintered electrolyte layer provided with the air electrode.

Assignees

• Lg Chemical Ltd

Inventors

• Choi Jeong Mi
• Lee Jongjin
• Son Bu Won
• Choi Kwangwook
• Im Sanghyeok
• Oh Takkeun

Classifications

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M8/1213 Primary

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

• H01M8/122

  Corrugated, curved or wave-shaped MEA · CPC title

• H01M4/8875

  Methods for shaping the electrode into free-standing bodies, like sheets, films or grids, e.g. moulding, hot-pressing, casting without support, extrusion without support · CPC title

• H01M8/1246 Primary

  the electrolyte consisting of oxides · CPC title