Composite electrolyte for a solid oxide fuel cell, exhaust gas probe or high-temperature gas sensor

Patent metadata

Field	Value
Publication number	US-2016181646-A1
Application number	US-201514972937-A
Country	US
Kind code	A1
Filing date	Dec 17, 2015
Priority date	Dec 19, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

This relates to a sinterable composite electrolyte compound, a sintered composite electrolyte, a method for manufacturing a sintered composite electrolyte and the use of the sintered composite electrolyte in a fuel cell, preferably a solid oxide fuel cell, an exhaust gas probe or a high-temperature gas sensor, and a fuel cell, preferably a solid oxide fuel cell, exhaust gas probe or high-temperature gas sensor containing the sintered composite electrolyte.

First claim

1 . A sinterable composite electrolyte compound, comprising
a) an electrolyte selected from the group consisting of 8YSZ, 10Sc1CeSZ, 10Sc1A1SZ, 10Sc2YbSZ, 3YSZ, 6ScSZ and mixtures thereof, and b) at least one material distributed in the electrolyte in a quantity from 0.1 to 15.0% by weight relative to the total weight of the electrolyte, wherein the material has an average particle size d 50 from 1 to 80 nm.

2 . The sinterable composite electrolyte compound according to claim 1 , wherein the sinterable composite electrolyte compound comprises the electrolyte in a quantity from 85 to 99.9% by weight, relative to the total weight of the compound.

3 . The sinterable composite electrolyte compound according to claim or 2 , wherein the electrolyte has an average particle size d 50 from 0.5 to 5 μm and/or the electrolyte has a particle size d 80 of <5 μm.

4 . The sinterable composite electrolyte compound according claim 1 , wherein the at least one material distributed in the electrolyte is selected from the group comprising 8YSZ, Al 2 O 3 , MgO, Al, Mg, 3YSZ, 6ScSZ, 10Sc1CeSZ, 10Sc1A1SZ, 10Sc2YbSZ and mixtures thereof.

5 . The sinterable composite electrolyte compound according to claim 4 , wherein the material distributed in the electrolyte comprises at least two materials selected from the group comprising 8YSZ, Al 2 O 3 , MgO, Al, Mg, 3YSZ, 6ScSZ, 10Sc1CeSZ, 10Sc1A1SZ, 10Sc2YbSZ and mixtures thereof, preferably at least three materials selected from the group comprising 8YSZ, Al 2 O 3 , MgO, Al, Mg, 3YSZ, 6ScSZ, 10Sc1CeSZ, 10Sc1A1SZ, 10Sc2YbSZ and mixtures thereof.

6 . The sinterable composite electrolyte compound according to claim 1 , wherein die sinterable composite electrolyte compound comprises the at least one material distributed in the electrolyte in a quantity from 0.2 to 10.0% by weight relative to the total weight of the electrolyte.

7 . The sinterable composite electrolyte compound according to claim 1 , wherein the at least one material distributed in the electrolyte has an average particle size d 50 from 2 to 50 nm.

8 . The sinterable composite electrolyte compound according to claim 1 , wherein the at least one material distributed in the electrolyte is present in the form of nanopowder or nanofibres.

9 . The sinterable composite electrolyte compound according to claim 1 , wherein the sinterable composite electrolyte compound additionally comprises a further material having an average particle size d 50 from 1 to 5 μm.

10 . The sinterable composite electrolyte compound according to claim 9 , wherein die sinterable composite electrolyte compound comprises the further material in a quantity from 0.1 to 1.0% by weight relative to the total weight of the electrolyte.

11 . (canceled)

12 . The sintered composite electrolyte according to claim 10 , wherein the sintered composite electrolyte has a density ≧5.9 g/cm 3 .

13 . A method for manufacturing a sintered composite electrolyte having a density ≧5.9 g/cm 3 , comprising the steps of:
preparing a sinterable composite electrolyte compound according to any one of claims 1 to 10 ,
sintering the sinterable composite electrolyte compound at temperatures ≦1300 ° C. and for a bonding time <5 h.

14 . (canceled)

15 . A fuel cell, preferably a solid oxide fuel cell, exhaust gas probe or high-temperature gas sensor containing the sintered composite electrolyte wherein the sintered composite electrolyte has a density ≧5.9 g/cm 3 .

Assignees

• Airbus Defence & Space Gmbh

Inventors

• Ecke Christian

Classifications

• B29C35/00

  Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor (moulds with incorporated heating or cooling means B29C33/02 {; thermal after-treatment of shaped articles B29C71/02}; curing devices for plastics dental prostheses A61C13/14; before moulding B29B13/00) · CPC title

• C04B2235/3224

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

• H01M8/1253 Primary

  the electrolyte containing zirconium oxide · CPC title

• H01M2300/0091

  in the form of mixtures · CPC title

• C04B35/4885

  with aluminium oxide · CPC title