Manufacturing method of large area thin film anode supported planar SOFC

Patent metadata

Field	Value
Publication number	US-11616239-B2
Application number	US-202117563817-A
Country	US
Kind code	B2
Filing date	Dec 28, 2021
Priority date	Dec 29, 2020
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

Disclosed is a method for manufacturing a large-area thin-film solid oxide fuel cell, the method including: preparing an anode support slurry, an anode functional layer slurry, an electrolyte slurry, and a buffer layer slurry for tape casting; preparing an anode support green film, an anode functional layer green film, an electrolyte green film, and a buffer layer green film by tape casting the slurries onto carrier films; staking the green films, followed by hot press and warm iso-static press (WIP), to prepare a laminated body; and co-sintering the laminated body.

First claim

What is claimed is:

1. A method for manufacturing a large-area thin-film solid oxide fuel cell, the method comprising:
preparing an anode support slurry, an anode functional layer slurry, an electrolyte slurry, and a buffer layer slurry for tape casting;
preparing an anode support green film, an anode functional layer green film, an electrolyte green film, and a buffer layer green film by tape casting the slurries onto carrier films;
staking the green films, followed by hot press and warm iso-static press (WIP), to prepare a laminated body; and
co-sintering the laminated body.

2. The method of claim 1 , wherein the anode support slurry contains, relative to the entire weight thereof, 10-14 wt % of a pore former, 8-12 wt % of a binder, 1-3 wt % of a surfactant, 1-3 wt % of a dispersion, and a plasticizer, the plasticizer to binder ratio being 0.3-0.5.

3. The method of claim 1 , wherein the anode functional layer slurry contains, relative to the entire weight thereof, 8-12 wt % of a binder, 1-3 wt % of a surfactant, 1-3 wt % of a dispersion, and a plasticizer, the plasticizer to binder ratio being 0.3-0.5.

4. The method of claim 1 , wherein the electrolyte slurry contains, relative to the entire weight thereof, 6-10 wt % of a binder, 1-3 wt % of a surfactant, 1-3 wt % of a dispersion, and a plasticizer, the plasticizer to binder ratio being 0.3-0.5.

5. The method of claim 1 , wherein the buffer layer slurry contains, relative to the entire weight thereof, 3-7 wt % of a binder, 1-3 wt % of a surfactant, 1-3 wt % of a dispersion, and a plasticizer, the plasticizer to binder ratio being 0.3-0.5.

6. The method of claim 1 , wherein the anode support layer slurry has a viscosity of 1400-1550 Cp, the anode functional layer slurry has a viscosity of 1200-1300 Cp, the electrolyte slurry has a viscosity of 300-400 Cp, and the buffer layer slurry has a viscosity of 150-250 Cp.

7. The method of claim 1 , wherein the tape casting is performed at a rate of 0.5-1 cm s −1 and a temperature of 30-70° C.

8. The method of claim 1 , wherein the hot press is performed at a pressure of 40-60 MPa and a temperature of 50-90° C.

9. The method of claim 1 , wherein, after the hot press, lamination is performed at a temperature of 40-60° C. with rotation of the green films by 90°.

10. The method of claim 1 , wherein the WIP is performed in a water/oil medium at a pressure of 40-50 MPa and a temperature of 50-90° C.

11. The method of claim 1 , wherein the co-sintering is performed at 1300-1400° C.

12. A large-area thin film solid oxide fuel cell manufactured by the method of claim 1 .

Assignees

• Korea Inst Energy Res

Inventors

• Song Rak Hyun
• Hussain Amjad
• Joh Dong Woo
• Hong Jong Eun
• Lee Seung Bok
• Lim Tak Hyoung
• Kim Tae Hun
• Kwon Beom Su

Classifications

• Y02E60/50

  Fuel cells · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M4/8814 Primary

  Temporary supports, e.g. decal · CPC title

• H01M4/8885

  Sintering or firing · CPC title

• H01M8/1213 Primary

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