Solid oxide fuel cell and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2016164114-A1
Application number	US-201414908057-A
Country	US
Kind code	A1
Filing date	Jul 30, 2014
Priority date	Jul 31, 2013
Publication date	Jun 9, 2016
Grant date	—

Abstract

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

First claim

1 . A solid oxide fuel cell comprising:
an air electrode; a fuel electrode; and an electrolyte provided between the air electrode and the fuel electrode, wherein at least one of the air electrode, the fuel electrode and the electrolyte includes a glass frit or a material derived from the glass frit.

2 . The solid oxide fuel cell of claim 1 , wherein the glass frit or the material derived from the glass frit is a sintering aid.

3 . The solid oxide fuel cell of claim 1 , wherein the glass frit includes one or more types selected from the group consisting of SiO 2 , B 2 O 3 , Al 2 O 3 , Bi 2 O 3 , PbO, CaO, BaO, LiO, MgO, Na 2 O, K 2 O, ZnO, MnO, ZrO 2 , V 2 O 5 , P 2 O 5 , Y 2 O 3 , SrO, GaO, Se 2 O 3 , TiO 2 and La 2 O 3 .

4 . The solid oxide fuel cell of claim 1 , wherein the glass frit includes one or more types selected from the group consisting of ZnO-SiO 2 -based, ZnO-B 2 O 3 -SiO 2 -based, ZnO-B 2 O 3 -SiO 2 -Al 2 O 3 -based, Bi 2 O 3 -SiO 2 -based, Bi 2 O 3 -B 2 O 3 -SiO 2 -based, Bi 2 O 3 -B 2 O 3 -SiO 2 -Al 2 O 3 -based, Bi 2 O 3 -ZnO-B 2 O 3 -SiO 2 -based, Bi 2 O 3 -ZnO-B 2 O 3 -SiO 2 -Al 2 O 3 -based and La 2 O 3 -B 2 O 3 -BaO-TiO 2 -based glass frits.

5 . The solid oxide fuel cell of claim 1 , wherein the glass frit has a glass transition temperature (Tg) of greater than or equal to 450° C. and less than or equal to 900° C.

6 . The solid oxide fuel cell of claim 1 , wherein the electrolyte includes the glass frit or the material derived from the glass frit.

7 . The solid oxide fuel cell of claim 6 , wherein content of the glass frit or the material derived from the glass frit is greater than or equal to 0.01% by weight and less than or equal to 10% by weight with respect to the total weight of the electrolyte.

8 . The solid oxide fuel cell of claim 6 , wherein the electrolyte has a baking temperature lower by 1% to 50% compared to a state without the glass frit or the material derived from the glass frit.

9 . The solid oxide fuel cell of claim 1 , wherein the material derived from the glass frit is the glass frit melted and then re-solidified.

10 . The solid oxide fuel cell of claim 1 , wherein the electrolyte has porosity of greater than or equal to 0% and less than or equal to 5%.

11 . The solid oxide fuel cell of claim 1 , wherein the electrolyte includes one or more types selected from the group consisting of zirconium oxide-based, cerium oxide-based, lanthanum oxide-based, titanium oxide-based and bismuth oxide-based materials.

12 . The solid oxide fuel cell of claim 1 , which is a flat plate-type, a cylinder-type or a flat-tube type.

13 . A method for manufacturing a solid oxide fuel cell comprising:
preparing an air electrode precursor; preparing an electrolyte precursor; preparing a fuel electrode precursor; providing the electrolyte precursor between the air electrode precursor and the fuel electrode precursor; and baking the air electrode precursor, the electrolyte precursor and the fuel electrode precursor simultaneously, wherein at least one of the air electrode precursor, the electrolyte precursor and the fuel electrode precursor includes a glass frit.

14 . The method for manufacturing a solid oxide fuel cell of claim 13 , wherein a temperature of the baking is greater than or equal to 800° C. and less than or equal to 1,600° C.

15 . The method for manufacturing a solid oxide fuel cell of claim 13 , wherein the electrolyte precursor includes a glass frit.

16 . The method for manufacturing a solid oxide fuel cell of claim 13 , wherein the preparing of an air electrode precursor; the preparing of an electrolyte precursor; and the preparing of a fuel electrode precursor each independently include forming a membrane using a tape casting method or a screen printing method, and then drying the membrane.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Jong Woo
• Choi Kwangwook
• Shin Dong Oh
• Ryoo Changseok
• Kim Gyunjoong

Classifications

• C04B2235/365

  Borosilicate glass · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• C04B35/50

  based on rare-earth compounds {(non-oxide rare earth compounds C04B35/5156)} · CPC title

• H01M4/8889

  Cosintering or cofiring of a catalytic active layer with another type of layer · CPC title

• H01M2300/0074

  Ion conductive at high temperature · CPC title