Proton ceramics fuel cell and method for production of same

Patent metadata

Field	Value
Publication number	US-11196073-B2
Application number	US-201916975997-A
Country	US
Kind code	B2
Filing date	Feb 22, 2019
Priority date	Feb 27, 2018
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

The present invention relates to a proton ceramic fuel cell which has a hydrogen-permeable film as an anode and in which an electrolyte material is BaZrxCe1-x-zYzO3 (x=0.1 to 0.8, z=0.1 to 0.25, x+z≤1.0) (BZCY). An electron-conducting oxide thin film having a film thickness of 1-100 nm is present between a cathode and an electrolyte comprising the material. The present invention also relates to a method for producing a proton ceramic fuel cell having a hydrogen-permeable film as an anode. The method comprises forming a thin film having a thickness of 1-100 nm between a cathode and an electrolyte comprising BZCY, the thin film comprising an electron-conducting oxide. The present invention provides a novel means for improving the output of a PCFC in which BZCY is used in an electrolyte material, and provides a PCFC having an output that exceeds a benchmark of 0.5 W cm−2 at 500° C.

First claim

The invention claimed is:

1. A proton ceramics fuel cell in which an electrolyte material is BaZr x Ce 1−x−z Y z O 3 (x=0.1 to 0.8, z=0.1 to 0.25, x+z≤1.0) and a hydrogen permeable membrane is an anode, wherein the fuel cell comprises an electron conductive oxide thin film having a film thickness in a range of 1 to 100 nm between the electrolyte made of the above material and a cathode.

2. The fuel cell according to claim 1 , wherein the electron conductive oxide is lanthanum-containing perovskite compound, nickel oxide, manganese oxide, zinc oxide or indium oxide.

3. The fuel cell according to claim 2 , wherein the lanthanum-containing perovskite compound contains strontium and/or cobalt.

4. The fuel cell according to claim 2 , wherein the lanthanum-containing perovskite compound is La 0.5 Sr 0.5 CoO 3 .

5. The fuel cell according to claim 1 , wherein the film thickness of the thin film is in a range of 5 to 80 nm.

6. The fuel cell according to claim 1 , wherein the electron conductive oxide thin film is an electron conductive oxide agglomerate thin film.

7. The fuel cell according to claim 6 , wherein the electron conductive oxide agglomerate thin film is a polycrystalline thin film, a thin film of an aggregate of amorphous particles or a thin film of a mixture of a polycrystalline and an aggregate of amorphous particles.

8. The fuel cell according to claim 1 , wherein operating temperature is in a range of 400 to 600° C.

9. The fuel cell according to claim 1 , wherein the cathode is a porous cathode.

10. The fuel cell according to claim 1 , wherein the cathode is a porous cathode and the electron conductive oxide thin film is an electron conductive oxide agglomerate thin film.

11. The fuel cell according to claim 1 , wherein the electron conductive oxide is nickel oxide, manganese oxide, zinc oxide or indium oxide.

12. A method for production of a proton ceramics fuel cell comprising a hydrogen permeable membrane as an anode, wherein the method comprises formation of a thin film having a film thickness in a range of 1 to 100 nm between an electrolyte made of BaZr x Ce 1−x−z Y z O 3 (x=0.1 to 0.8, z=0.1 to 0.25, x+z≤1.0) and a cathode, and the thin film is comprised of an electron conductive oxide.

13. The method for production according to claim 12 , wherein the electron conductive oxide is lanthanum-containing perovskite compound, nickel oxide, manganese oxide, zinc oxide or indium oxide.

14. The method for production according to claim 12 , wherein the electron conductive oxide thin film is an electron conductive oxide agglomerate thin fim.

15. The method for production according to claim 14 , wherein the electron conductive oxide agglomerate thin film is a polycrystalline thin film, a thin film of an aggregate of amorphous particles or a thin film of a mixture of a polycrystalline and an aggregate of amorphous particles.

16. The method for production according to claim 12 , wherein the electron conductive oxide thin film is formed by a sputtering method or a sol-gel method.

17. The method for production according to claim 12 , wherein the cathode is a porous cathode.

18. The method for production according to claim 12 , wherein the cathode is a porous cathode and the electron conductive oxide thin film is an electron conductive oxide agglomerate thin film.

19. The method for production according to claim 12 , wherein the electron conductive oxide is nickel oxide, manganese oxide, zinc oxide or indium oxide.

Assignees

• Univ Hokkaido Nat Univ Corp

Inventors

• Aoki Yoshitaka
• Habazaki Hiroki
• Yamaguchi Tomoyuki

Classifications

• H01M8/1246

  the electrolyte consisting of oxides · CPC title

• H01M4/92

  Metals of platinum group (H01M4/94 {, H01M4/9058} take precedence) · CPC title

• H01M2300/0074

  Ion conductive at high temperature · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M8/1231 Primary

  with both reactants being gaseous or vaporised · CPC title