# US 2017/0288251 A1 · Membrane electrode assembly and solid oxide fuel cell

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- Number: US 2017/0288251 A1
- Document ID: US20170288251A1
- Status: Published application
- Kind: A1
- Application number: 15/465,657
- Filed: 2017-03-22
- Published: 2017-10-05
- Earliest claimed: 2016-04-04
- Assignees: Panasonic Corporation
- Applicants: Panasonic Corporation
- Inventors: TOMOYA KAMATA; YUICHI MIKAMI; KOSUKE YAMAUCHI; TOMOHIRO KUROHA; ATSUO OKAICHI
- Web page: https://patentgrep.com/patent/US20170288251A1

## CPC

- H01M 8/1253: the electrolyte containing zirconium oxide
- B01D 53/00: Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols, (recovery of volatile solvents by condensation B01D5/00; sublimation B01D7/00; cold traps, cold baffles B01D8/00; working-up undefined gaseous mixtures obtained by cracking hydrocarbon oils C10G70/00; cleaning coal gas C10K; working-up of natural gas, or synthetic natural gas, C10L3/10; separation of difficult-to-condense gases or air by liquefaction F25J; for investigating materials G01N30/00)
- C25B 1/04: by electrolysis of water
- C25B 9/23: comprising ion-exchange membranes in or on which electrode material is embedded
- C25B 13/04: characterised by the material
- C25B 13/05: based on inorganic materials
- H01B 1/08: oxides
- H01M 4/8647: {consisting of more than one material, e.g. consisting of composites}
- H01M 4/9033: {Complex oxides, optionally doped, of the type M1MeO3, M1 being an alkaline earth metal or a rare earth, Me being a metal, e.g. perovskites}
- H01M 8/1213: characterised by the electrode/electrolyte combination or the supporting material
- H01M 8/1246: the electrolyte consisting of oxides
- H01M 2008/1293: {Fuel cells with solid oxide electrolytes}
- H01M 2300/0094: in the form of layered products, e.g. coatings
- Y02E 60/36: Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
- Y02E 60/50: Fuel cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- 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)
- 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})
- 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

A membrane electrode assembly includes an electrode consisting of at least one compound selected from the group consisting of lanthanum strontium cobalt complex oxide, lanthanum strontium cobalt ferrite complex oxide, lanthanum strontium ferrite complex oxide, and lanthanum nickel ferrite complex oxide or consisting of a composite of the compound and an electrolyte material, and a first solid electrolyte membrane represented by a composition formula of BaZr1-xlnxO3−δ (0<x<1). The electrode is in contact with the first solid electrolyte membrane.

## Claims

### Claim 1

A membrane electrode assembly comprising:
an electrode consisting of at least one compound selected from the group consisting of lanthanum strontium cobalt complex oxide, lanthanum strontium cobalt ferrite complex oxide, lanthanum strontium ferrite complex oxide, and lanthanum nickel ferrite complex oxide or consisting of a composite of the compound and an electrolyte material;
a first solid electrolyte membrane represented by a composition formula of BaZr1-xlnxO3−δ (0<x<1); and
a second solid electrolyte membrane having a composition different from the composition of the first solid electrolyte membrane,
wherein the first solid electrolyte membrane has a first surface in contact with the electrode and a second surface, which is a surface opposite to the first surface, in contact with the second solid electrolyte membrane, and
wherein the electrode, the first solid electrolyte membrane, and the second solid electrolyte membrane are stacked in this order.

### Claim 2 (depends on 1)

The membrane electrode assembly according to claim 1, wherein the second solid electrolyte membrane is represented by a composition formula of BaZr1-x1M1x1O3−δ,
where M1 represents at least one element selected from the group consisting of La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Y, Sc, Mn, Fe, Co, Ni, Al, Ga, In, and Lu, and x1 satisfies 0<x1<1.

### Claim 3 (depends on 1)

The membrane electrode assembly according to claim 1, wherein the electrode is a cathode electrode, and
the membrane electrode assembly further includes an anode electrode containing Ni and a compound represented by any one composition formula selected from the group consisting of BaZr1-x2M2x2O3−δ, BaCe1-x3M3x3O3−δ, and BaZr1-x4-y4Cex4M4y4O3−δ,
where M2, M3, and M4 each represent at least one element selected from the group consisting of La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Y, Sc, Mn, Fe, Co, Ni, Al, Ga, In, and Lu, x2, x3, x4, and y4 each satisfies 0<x2<1, 0<x3<1,0<x4<1, and 0<y4<1,
the second solid electrolyte membrane has a first surface in contact with the first solid electrolyte membrane and a second surface, which is a surface opposite to the first surface, in contact with the anode electrode, and
the cathode electrode, the first solid electrolyte membrane, the second solid electrolyte membrane, and the anode electrode are stacked in this order.

### Claim 4 (depends on 1)

The membrane electrode assembly according to claim 1, wherein the first solid electrolyte membrane has a thickness equal to or less than a thickness of the second solid electrolyte membrane.

### Claim 5 (depends on 4)

The membrane electrode assembly according to claim 4, wherein the second solid electrolyte membrane is a dense body.

### Claim 6

A solid oxide fuel cell comprising a membrane electrode assembly including:
an electrode consisting of at least one compound selected from the group consisting of lanthanum strontium cobalt complex oxide, lanthanum strontium cobalt ferrite complex oxide, lanthanum strontium ferrite complex oxide, and lanthanum nickel ferrite complex oxide or consisting of a composite of the compound and an electrolyte material;
a first solid electrolyte membrane represented by a composition formula of BaZr1-xlnxO3−δ (0<x<1); and
a second solid electrolyte membrane having a composition different from the composition of the first solid electrolyte membrane,
wherein the first solid electrolyte membrane has a first surface in contact with the electrode and a second surface, which is a surface opposite to the first surface, in contact with the second solid electrolyte membrane, and
wherein the electrode, the first solid electrolyte membrane, and the second solid electrolyte membrane are stacked in this order.