Low temperature electrolytes for solid oxide cells having high ionic conductivity

Patent metadata

Field	Value
Publication number	US-10344389-B2
Application number	US-201715597126-A
Country	US
Kind code	B2
Filing date	May 16, 2017
Priority date	Feb 10, 2010
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

Methods for forming a metal oxide electrolyte improve ionic conductivity. Some of those methods involve applying a first metal compound to a substrate, converting that metal compound to a metal oxide, applying a different metal compound to the metal oxide, and converting the different metal compound to form a second metal oxide. Electrolytes so formed can be used in solid oxide fuel cells, electrolyzers, and sensors, among other applications.

First claim

We claim:

1. A solid oxide cell, comprising:
an inner tubular electrode having an outer surface;
an outer electrode; and
a metal oxide electrolyte adapted to provide ionic conductivity between the inner tubular electrode and the outer electrode;
wherein the metal oxide electrolyte comprises a plurality of thin sheets oriented substantially perpendicular to the outer surface of the inner tubular electrode, and a metal oxide contacting the thin sheets;
wherein the thin sheets are mica.

2. The solid oxide cell of claim 1 , wherein the solid oxide cell is a solid oxide fuel cell.

3. The solid oxide cell of claim 2 ,
wherein the inner tubular electrode is adapted to contact a hydrogen-containing gas and act as an anode; and
wherein the outer electrode is adapted to contact an oxygen-containing gas and act as a cathode.

4. The solid oxide cell of claim 1 , wherein the metal oxide comprises yttria-stabilized zirconia.

5. The solid oxide cell of claim 4 , wherein the yttria-stabilized zirconia comprises from about 10 mol % to about 20 mol % yttria.

6. The solid oxide cell of claim 4 , wherein the yttria-stabilized zirconia comprises from about 12 mol % to about 18 mol % yttria.

7. The solid oxide cell of claim 4 , wherein the yttria-stabilized zirconia comprises from about 14 mol % to about 16 mol % yttria.

8. The solid oxide cell of claim 1 , wherein the metal oxide electrolyte comprises at least one catalytic material chosen from platinum, palladium, rhodium, nickel, cerium, gold, silver, zinc, lead, ruthenium, rhenium, or a mixture thereof.

9. The solid oxide cell of claim 1 , wherein the outer electrode is an outer tubular electrode.

Assignees

• Fcet Inc
• Ut Battelle Llc

Inventors

• Budaragin Leonid V
• Deininger Mark A
• Pozvonkov Michael M
• Spears Ii D Morgan
• Fisher Paul D
• Pasto Arvid E

Classifications

• H01M2300/0074

  Ion conductive at high temperature · CPC title

• H01M8/1006

  Corrugated, curved or wave-shaped MEA · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M8/126

  the electrolyte containing cerium oxide · CPC title

• H01M2300/0091

  in the form of mixtures · CPC title