Solid oxide fuel cell and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-9923213-B2
Application number	US-201414908057-A
Country	US
Kind code	B2
Filing date	Jul 30, 2014
Priority date	Jul 31, 2013
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

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

First claim

The invention claimed is:

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, and
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.

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 has a glass transition temperature (Tg) of greater than or equal to 450° C. and less than or equal to 900° C.

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

6. The solid oxide fuel cell of claim 5 , 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.

7. The solid oxide fuel cell of claim 5 , 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.

8. 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.

9. 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%.

10. 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.

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

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• H01M8/1266

  the electrolyte containing bismuth oxide · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• C04B2235/3225

  Yttrium oxide or oxide-forming salts thereof · CPC title

• C04B35/50

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

• H01M8/124 Primary

  characterised by the process of manufacturing or by the material of the electrolyte · CPC title