Low temperature electrolytes for solid oxide cells having high ionic conductivity

Patent metadata

Field	Value
Publication number	US-12071697-B2
Application number	US-202218080905-A
Country	US
Kind code	B2
Filing date	Dec 14, 2022
Priority date	Feb 10, 2010
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

Abstract

Methods for forming a metal oxide electrolyte include applying a metal compound to a first material in powder form thereby forming a slurry, applying the slurry to an electrode, and converting at least some of the metal compound to form a metal oxide, thereby forming the metal oxide electrolyte on the electrode. Unexpectedly, the metal oxide electrolyte may have an ionic conductivity greater than the bulk ionic conductivity of the first material and of the metal oxide, possibly because of the nature of the interface between the first material and the metal oxide.

First claim

We claim:

1. A method for forming a metal oxide electrolyte, comprising:
applying a metal compound to a first material in powder form thereby forming a slurry;
applying the slurry to an electrode; and
converting at least some of the metal compound to form a metal oxide, thereby forming the metal oxide electrolyte on the electrode;
wherein the metal oxide electrolyte has an ionic conductivity greater than the bulk ionic conductivity of the first material and of the metal oxide.

2. The method of claim 1 , wherein the first material in powder form comprises strontium titanate, and the metal oxide comprises yttria-stabilized zirconia.

3. The method of claim 1 , wherein the first material in powder form comprises mica, and the metal oxide comprises yttria-stabilized zirconia, gadolinium-doped ceria, alumina, or a combination thereof.

4. The method of claim 1 , further comprising applying an orienting force before, during, or before and during the converting.

5. The method of claim 4 , wherein the orienting force is chosen from magnetic fields, electric fields, and combinations thereof.

6. The method of claim 1 , wherein the metal oxide comprises yttria-stabilized zirconia.

7. The method of claim 6 , wherein the yttria-stabilized zirconia comprises from about 10 mol % to about 20 mol % yttria.

8. The method of claim 6 , wherein the yttria-stabilized zirconia comprises from about 12 mol % to about 18 mol % yttria.

9. The method of claim 6 , wherein the yttria-stabilized zirconia comprises from about 14 mol % to about 16 mol % yttria.

10. The method 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.

Assignees

• Fcet Inc
• Ut Battelle Llc

Inventors

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

Classifications

• H01M2300/0071

  Oxides · CPC title

• H01M8/1016

  characterised by the electrolyte material (H01M8/12 takes precedence) · CPC title

• H01M8/1006

  Corrugated, curved or wave-shaped MEA · CPC title

• H01M8/004

  Cylindrical, tubular or wound · CPC title

• G01N27/4073

  Composition or fabrication of the solid electrolyte · CPC title