Anode for molten carbonate fuel cell having improved creep property, method for preparing the same, and molten carbonate fuel cell using the anode

Patent metadata

Field	Value
Publication number	US-10276875-B2
Application number	US-201615374732-A
Country	US
Kind code	B2
Filing date	Dec 9, 2016
Priority date	Dec 23, 2015
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

An anode for a molten carbonate fuel cell (MCFC) having improved creep property by adding CeO2 and/or Cr for imparting creep resistance to nickel-aluminum alloy and nickel as materials for an anode is provided. Improved sintering property, creep property and increased mechanical strength of a molten carbonate fuel cell may be obtained accordingly.

First claim

What is claimed is:

1. A method for preparing an anode for a molten carbonate fuel cell, comprising adding at least one additive for imparting creep resistance selected from the group consisting of CeO 2 and Cr to nickel-aluminum alloy powder and nickel powder to improve creep property,
wherein the additive for imparting creep resistance is added to the nickel-aluminum powder and the nickel powder, a resultant mixture is subjected to tape casting to obtain a sheet, and then sintering is carried out.

2. The method for preparing an anode for a molten carbonate fuel cell according to claim 1 , wherein the sheet is mounted to a molten carbonate fuel cell and then sintering is carried out in the molten carbonate fuel cell.

3. The method for preparing an anode for a molten carbonate fuel cell according to claim 1 , wherein dispersant, plasticizer, solvent, binder and defoamer are further added.

4. A method for preparing an anode for a molten carbonate fuel cell according to claim 1 , further comprising:
adding Cr as an additive for imparting creep resistance to nickel-aluminum alloy powder and nickel powder to improve creep property,
subjecting dispersant, solvent and defoamer to primary ball milling;
mixing the resultant mixture with the nickel-aluminum alloy powder and the nickel powder, plasticizer, binder and the Cr after the primary ball milling, and subjecting the resultant mixture to secondary ball milling; and
carrying out de-airing and tape casting after the secondary ball milling.

5. A method for preparing an anode for a molten carbonate fuel cell, comprising adding an additive for imparting creep resistance, wherein the additive is CeO 2 , to nickel-aluminum alloy powder and nickel powder to improve creep property, which comprises:
mixing CeO 2 with dispersant, solvent and defoamer, and subjecting the mixture to primary ball milling;
mixing the resultant mixture with the nickel-aluminum alloy powder and the nickel powder, plasticizer and binder after the primary ball milling, and subjecting the resultant mixture to secondary ball milling; and
carrying out de-airing and tape casting after the secondary ball milling.

6. An anode for a molten carbonate fuel cell including sintered nickel powder and nickel-aluminum alloy powder, prepared by a process comprising:
adding at least one additive for imparting creep resistance selected from the group consisting of CeO 2 and Cr to nickel-aluminum alloy powder and nickel powder to improve creep property,
wherein the additive for imparting creep resistance is added to the nickel-aluminum powder and the nickel powder, a resultant mixture is subjected to tape casting to obtain a sheet, and then sintering is carried out, wherein the at least one additive for imparting creep resistance selected from the group consisting of CeO 2 and Cr is attached to nickel and nickel-aluminum alloy to improve creep property.

7. The anode for a molten carbonate fuel cell according to claim 6 , wherein the additive for imparting creep resistance selected from the group consisting of CeO 2 and Cr interrupt a creep phenomenon on the nickel or nickel-aluminum alloy surface, thereby improving creep resistance.

8. The anode for a molten carbonate fuel cell according to claim 6 , wherein the nickel-aluminum alloy is present in an amount of 30-70 wt % based on the weight of the nickel-aluminum alloy and nickel.

9. The anode for a molten carbonate fuel cell according to claim 6 , wherein the additive for imparting creep resistance is used in an amount of 0.2-5 wt % based on the total weight of the nickel-aluminum and nickel.

10. The anode for a molten carbonate fuel cell according to claim 6 , wherein CeO 2 has a size of 20 nm-0.3 μm and Cr has a size of 1-5 μm.

11. A molten carbonate fuel cell comprising the anode as defined in claim 6 .

Assignees

• Korea Inst Sci & Tech
• Korean Institute Of Science And Tech

Inventors

• Ham Hyung Chul
• Lee Min-Jae
• Lee Chang-Whan
• Jang Seong Cheol
• Choi Sun-Hee
• Park Hyun Seo
• Yoon Chang Won
• Yoon Sung Pil
• Han Jonghee
• Nam Suk Woo
• Lim Tae Hoon
• Kim Jin Young

Classifications

• H01M4/8885

  Sintering or firing · CPC title

• H01M4/8663 Primary

  Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers · CPC title

• H01M8/145

  comprising carbonates · CPC title

• H01M4/905

  specially used in fuel cell operating at high temperature, e.g. SOFC · CPC title

• Y02E60/526

  Cross-Sectional Technologies · mapped topic