Proton ceramics fuel cell and method for production of same

Patent metadata

Field	Value
Publication number	US-2021043957-A1
Application number	US-201916975997-A
Country	US
Kind code	A1
Filing date	Feb 22, 2019
Priority date	Feb 27, 2018
Publication date	Feb 11, 2021
Grant date	—

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-yYzO3 (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

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 23 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 1 , wherein operating temperature is in a range of 400 to 600° C.

8 . 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.

9 . The method for production according to claim 8 , wherein the electron conductive oxide is lanthanum-containing perovskite compound, nickel oxide, manganese oxide, zinc oxide or indium oxide.

10 . The method for production according to claim 8 , wherein the electron conductive oxide thin film is an electron conductive oxide agglomerate thin film.

11 . The method for production according to claim 8 , wherein the electron conductive oxide thin film is formed by a sputtering method or a sol-gel method.

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

13 . 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.

14 . 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.

15 . The method for production according to claim 8 , wherein the cathode is a porous cathode.

16 . The method for production according to claim 8 , wherein the cathode is a porous cathode and the electron conductive oxide thin film is an electron conductive oxide agglomerate thin film.

17 . The method for production according to claim 10 , 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.

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

19 . The method for production according to claim 1 , 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

• H01M2300/0074

  Ion conductive at high temperature · CPC title

• H01M8/1246

  the electrolyte consisting of oxides · CPC title

• H01M8/1231 Primary

  with both reactants being gaseous or vaporised · CPC title

• H01M8/1213

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

• H01M4/94

  Non-porous diffusion electrodes, e.g. palladium membranes, ion exchange membranes · CPC title