Production method for a support type coating membrane using tape casting

Patent metadata

Field	Value
Publication number	US-9962918-B2
Application number	US-201214345880-A
Country	US
Kind code	B2
Filing date	Sep 20, 2012
Priority date	Sep 21, 2011
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

The present invention relates to a production method for a support type ceramic membrane using tape casting, wherein, when producing a multifunctional membrane comprising a membrane structure such as a general electrochemical device or electrolysis cell or fuel cell, a dense-structure coating membrane or porous functional (separation) membrane is produced on one or more surfaces of a porous support.

First claim

What is claimed is:

1. A method of manufacturing a support type coating membrane, comprising the steps of:
forming a pre heat-treated support;
forming a green sheet on a release film for a coating membrane;
attaching the green sheet onto the pre heat-treated support directly to form a laminate including the release film, green sheet and support;
removing the release film from the laminate to form a combination of the support and green sheet; and
co-sintering the combination,
wherein the pre heat-treated support is an anode or cathode,
wherein the coating membrane is an electrolyte layer or separation membrane, and
wherein, in the step of forming the green sheet, the green sheet is formed by tape-casting a binder-containing ceramic slurry on the release film,
wherein, in the step of forming the support, the support is formed by molding and heat-treating binder-containing powder for support, and is a pre-sintered porous support having a porosity of 5 to 70%,
wherein, in the step of forming the combination of the support and green sheet by removing the release film, the green sheet is attached onto the support using a pressurization-type or depressurization-type attaching apparatus, and then the release film is removed therefrom,
wherein the green sheet is attached to the support by generating a pressure difference between both sides of the support using the pressurization-type or depressurization-type attaching apparatus, and
wherein the release film is separated by generating the pressure difference between both sides of the support using the pressurization-type or depressurization-type attaching apparatus.

2. The method of claim 1 , further comprising a step of applying a solvent or oil onto the support or green sheet before the step of forming the laminate, wherein the support is directly attached to the green sheet, and then the release film is removed therefrom.

3. The method of claim 1 , further comprising a step of aging the combination of the support and green sheet, after the step of forming the combination thereof by removing the release film.

4. The method of claim 1 , wherein the coating membrane has a thickness of 0.1 to 900 μm.

5. The method of claim 1 , wherein the thickness and composition of the coating membrane is adjusted at the time of forming the green sheet, or is adjusted at the time of forming a multi-layered dense-structure film by repeatedly attaching different green sheets to each other.

6. The method of claim 1 , wherein the support is formed into a pre-sintered porous anode support by a process comprising the steps of: mixing an anode material containing NiO powder with at least one doped oxide selected from among zirconia, ceria, bismuth oxide, a barium-strontium cerate compound and a lanthanum-strontium gallium-magnesia oxide at a weight ratio of 10:90 to 90:10; adding a pore forming agent to the mixture; ball-milling, drying and molding the mixture; and heat-treating the mixture at 600 to 1,500° C.

7. The method of claim 1 , wherein the support is formed into a pre-sintered porous anode support by a process comprising the steps of: mixing a perovskite structure compound (ABO 3 ), as a cathode material, whose A site is occupied with at least one selected from among La, Sr, Ca, Ba and Sm and whose B site is occupied with all or part of Mn, Co, Fe, Cr, Ni and Ti with at least one doped oxide selected from among zirconia, ceria, bismuth oxide, a barium-strontium cerate compound and a lanthanum-strontium gallium-magnesia oxide; adding a pore forming agent to the mixture; ball-milling, drying and molding the mixture; and heat-treating the mixture at 600 to 1,500° C.

8. The method of claim 1 , wherein the electrolyte layer is formed into an electrolyte green sheet by tape-casting a slurry including an organic binder, a solvent and at least one doped oxide-type electrolyte material selected from among zirconia, ceria, bismuth oxide, a barium-strontium cerate compound and a lanthanum-strontium gallium-magnesia oxide.

9. The method of claim 1 , wherein the support is a flat support, a tubular support or a hybrid support thereof.

10. The method of claim 9 , wherein the support is formed into a pre-sintered anode support by a process comprising the steps of: mixing an iron oxide including nickel oxide with electrolyte powder including yttria-stabilized zirconia at a weight ratio of 10:90 to 90:10; adding an organic binder, a solvent and a pore forming agent to the mixture; molding the mixture into a flat body, tubular body or hybrid thereof; and heat-treating the molded body at 1,000° C. or higher.

11. The method of claim 9 , wherein the support is formed into a pre-sintered cathode support by a process comprising the steps of: mixing an organic binder, a solvent and a pore forming agent with at least one selected from among zirconia oxide, alumina oxide, mullite oxide, silica oxide, carbide and nitride; molding the mixture into a flat body, tubular body or hybrid thereof; and heat-treating the molded body at 700° C. or higher.

12. The method of claim 1 , wherein the coating membrane has a sintered density of 30% or more.

13. A support type coating membrane, manufactured by the method of claim 1 .

14. A fuel cell, comprising the support type coating membrane of claim 13 .

15. An electrolysis cell, comprising the support type coating membrane of claim 13 .

Assignees

• Korea Electric Power Corp

Inventors

• Yoo Young-Sung
• Choi Mi-Hwa
• Lee Tae-Hee

Classifications

• H01M4/8657

  layered · CPC title

• H01M8/124

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

• C04B2237/348

  Zirconia, hafnia, zirconates or hafnates · CPC title

• C04B2237/765

  at least one member being a tube · CPC title

• H01M8/1226

  characterised by the supporting layer · CPC title