# US 2018/0023205 A1 · Low Temperature Electrolytes for Solid Oxide Cells Having High Ionic Conductivity

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- Number: US 2018/0023205 A1
- Document ID: US20180023205A1
- Status: Published application
- Kind: A1
- Application number: 15/597,126
- Filed: 2017-05-16
- Published: 2018-01-25
- Earliest claimed: 2010-02-10
- Assignees: Fcet, Inc.; UT-Battelle, LLC
- Applicants: Fcet, Inc.; UT-Battelle, LLC
- Inventors: Leonid V. Budaragin; Mark A. Deininger; Michael M. Pozvonkov; D. Morgan Spears, II; Paul D. Fisher; Arvid E. Pasto
- Web page: https://patentgrep.com/patent/US20180023205A1

## CPC

- C25B 13/04: characterised by the material
- C04B 35/628: Coating the powders {or the macroscopic reinforcing agents}
- C25B 9/19: with diaphragms
- C25B 9/23: comprising ion-exchange membranes in or on which electrode material is embedded
- C25B 13/07: based on ceramics
- G01N 27/40: Semi-permeable membranes or partitions
- G01N 27/4073: {Composition or fabrication of the solid electrolyte}
- H01B 1/122: {Ionic conductors}
- H01M 8/004: {Cylindrical, tubular or wound}
- H01M 8/0271: Sealing or supporting means around electrodes, matrices or membranes
- H01M 8/1006: Corrugated, curved or wave-shaped MEA
- H01M 8/1007: with both reactants being gaseous or vaporised (H01M8/12 takes precedence)
- H01M 8/1016: characterised by the electrolyte material (H01M8/12 takes precedence)
- H01M 8/1246: the electrolyte consisting of oxides
- H01M 8/1253: the electrolyte containing zirconium oxide
- H01M 8/126: the electrolyte containing cerium oxide
- H01M 8/243: Grouping of unit cells of tubular or cylindrical configuration
- H01M 2008/1293: {Fuel cells with solid oxide electrolytes}
- H01M 2300/0071: Oxides
- H01M 2300/0074: Ion conductive at high temperature
- H01M 2300/0077: based on zirconium oxide
- H01M 2300/0091: in the form of mixtures
- Y02E 60/50: Fuel cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B)
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## 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.

## Claims

### Claim at position 1

-15. (canceled)

### Claim 16

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.

### Claim 17 (depends on 16)

The solid oxide cell of claim 16, wherein the solid oxide cell is a solid oxide fuel cell.

### Claim 18 (depends on 16)

The solid oxide cell of claim 16, wherein the metal oxide comprises yttria-stabilized zirconia.

### Claim 19 (depends on 18)

The solid oxide cell of claim 18, wherein the yttria-stabilized zirconia comprises from about 10 mol % to about 20 mol % yttria.

### Claim 20 (depends on 18)

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

### Claim 21 (depends on 18)

The solid oxide cell of claim 18, wherein the yttria-stabilized zirconia comprises from about 14 mol % to about 16 mol % yttria.

### Claim 22 (depends on 16)

The solid oxide cell of claim 16, 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.

### Claim 23 (depends on 16)

The solid oxide cell of claim 16, wherein the outer electrode is an outer tubular electrode.

### Claim 24 (depends on 17)

The solid oxide cell of claim 17,
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.