Method for producing fuel cell including nanofibers of metal oxide

Patent metadata

Field	Value
Publication number	US-9564653-B2
Application number	US-201514641129-A
Country	US
Kind code	B2
Filing date	Mar 6, 2015
Priority date	Mar 31, 2010
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

A production method for producing a fuel cell, includes spinning a precursor consisting of a salt of at least one metal chosen from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Sr, Ba, Mn, Co, Mg, and Ga, a solvent, and a macromolecular polymer to produce nanofibers of the precursor containing the salt of the metal. The method further includes calcining the nanofibers of the precursor at a temperature ranging from 550° C. to 650° C. for 2 to 4 hours, and making a solid electrolyte material composed of the nanofibers obtained from the calcining. The resulting solid electrolyte material constitutes a part of a fuel cell.

First claim

The invention claimed is:

1. A method for producing a fuel cell, the method comprising:
spinning a precursor consisting of a salt of at least one metal chosen from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Sr, Ba, Mn, Co, Mg, and Ga, a solvent, and a macromolecular polymer to produce nanofibers of the precursor containing the salt of the metal, wherein the average molecular weight of the macromolecular polymer ranges from 1,000 to 100,000;
calcining the nanofibers of the precursor containing the salt of the metal at a temperature ranging from 550° C. to 650° C. for 2 to 4 hours, to obtain nanofibers of metal oxide containing the at least one metal;
making a solid electrolyte material composed of the nanofibers obtained from the calcining; and
forming a part of a fuel cell composed of the solid electrolyte material.

2. The method according to claim 1 , wherein the metal oxide is a metal oxide of at least one metal chosen from Sc, Y, La, Ce, Pr, Nd, Sm, and Gd.

3. The method according to claim 1 , wherein the nanofibers of the precursor containing the salt of the metal are prepared by electrospinning or liquid phase spinning method.

4. The method according to claim 1 , wherein the metal oxide is a metal oxide of at least two metal elements chosen from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Sr, Ba, Mn, Co, Mg and Ga.

5. The method according to claim 1 , wherein the concentration of the macromolecular polymer is 5 mass % to 15 mass % with respect to the total mass of the precursor.

6. The method according to claim 1 , wherein the nanofibers of metal oxide are composed of metal oxide crystal with a three-dimensional structure, and in the nanofibers of metal oxide, adjacent metal oxide crystal grains connect to have a grain boundary network structure.

7. The method according to claim 1 , wherein the at least one metal of the salt is chosen from Sc, Y, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Sr, Ba, Mn, Co, Mg, and Ga.

8. The method according to claim 1 , wherein the metal oxide is a metal oxide selected from gadolinium-doped cerium oxide and yttrium-stabilized zirconia.

Assignees

• Pan Wei
• Li Bin
• Liu Yanyi
• Kawai Masashi
• Toyota Motor Co Ltd
• Univ Tsinghua

Inventors

• Pan Wei
• Li Bin
• Liu Yanyi
• Kawai Masashi

Classifications

• C04B35/63416

  Polyvinylalcohols [PVA]; Polyvinylacetates · CPC title

• H01M8/1081

  starting from solutions, dispersions or slurries exclusively of polymers · CPC title

• C04B2235/3224

  Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide · CPC title

• C04B2235/77

  Density · CPC title

• C04B2235/3229

  Cerium oxides or oxide-forming salts thereof · CPC title