# US 9,437,343 B2 · Proton conductor

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- Number: US 9,437,343 B2
- Document ID: US9437343B2
- Status: Granted
- Kind: B2
- Application number: 14/469,316
- Filed: 2014-08-26
- Published: 2015-01-22
- Granted: 2016-09-06
- Earliest claimed: 2013-07-16
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Corporation
- Inventors: Yuji Zenitani; Takashi Nishihara
- Web page: https://patentgrep.com/patent/US9437343B2

## CPC

- H01B 1/08: oxides
- C04B 35/01: based on oxide ceramics
- C04B 35/486: Fine ceramics
- C04B 35/50: based on rare-earth compounds {(non-oxide rare earth compounds C04B35/5156)}
- C04B 35/505: based on yttrium oxide
- C23C 14/088: {of the type ABO3 with A representing alkali, alkaline earth metal or Pb and B representing a refractory or rare earth metal}
- H01M 8/1016: characterised by the electrolyte material (H01M8/12 takes precedence)
- H01M 8/1027: having carbon, oxygen and other atoms, e.g. sulfonated polyethersulfones [S-PES]
- H01M 8/1246: the electrolyte consisting of oxides
- C04B 2235/3205: Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B 2235/3213: Strontium oxides or oxide-forming salts thereof
- C04B 2235/3215: Barium oxides or oxide-forming salts thereof
- C04B 2235/3225: Yttrium oxide or oxide-forming salts thereof
- C04B 2235/3229: Cerium oxides or oxide-forming salts thereof
- C04B 2235/3244: Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
- C04B 2235/3286: Gallium oxides, gallates, indium oxides, indates, thallium oxides, thallates or oxide forming salts thereof, e.g. zinc gallate
- C04B 2235/768: Perovskite structure ABO3
- C04B 2235/79: Non-stoichiometric products, e.g. perovskites (ABO3) with an A/B-ratio other than 1
- C04B 2235/81: Materials characterised by the absence of phases other than the main phase, i.e. single phase materials
- H01M 2300/0071: Oxides
- H01M 2300/0074: Ion conductive at high temperature
- Y02E 60/50: Fuel cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- 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})
- 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
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- 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

An exemplary proton conductor according to the present disclosure has a perovskite-type crystal structure expressed by the compositional formula AaB1-xB′xO3-δ. The A element is an alkaline-earth metal and is contained in a range of 0.4<a<0.9, where the a value represents a mole fraction of this element, and the B′ element is a trivalent group 3 or group 13 element and is contained in a range of 0.2<x<0.6, where the x value represents a mole fraction of this element.

## Claims

### Claim 1

A proton conductor having a perovskite-type crystal structure expressed by the compositional formula AaB1-xB′xO3-δ, wherein:
the proton conductor is composed of a single phase which is substantially uniform in composition and crystal structure,
A is at least one selected from among alkaline-earth metals,
B is a tetravalent group 4 transition metal or Ce, and
B′ is a trivalent group 3 or group 13 element,
where 0.4<a<0.9 and 0.2<x<0.6 are satisfied.

### Claim 2 (depends on 1)

The proton conductor of claim 1, wherein:
A is at least one selected from among Ba and Sr,
B is Zr, and
B′ is Y or In.

### Claim 3 (depends on 1)

The proton conductor of claim 1, wherein:
0.4<a<0.8, and
0.3<x<0.6.

### Claim 4 (depends on 1)

The proton conductor of claim 1, wherein:
0.4<a<0.8, and
0.4<x<0.6.

### Claim 5 (depends on 1)

The proton conductor of claim 1, wherein:
0.4<a<0.6, and
0.4<x<0.6.

### Claim 6 (depends on 1)

The proton conductor of claim 1, wherein:
0.4<a<0.5, and
0.4<x<0.6.

### Claim 7 (depends on 1)

The proton conductor of claim 1, wherein an activation energy of proton conduction in a temperature range of not less than 100° C. and not more than 500° C. is 0.1 eV or less.

### Claim 8 (depends on 1)

The proton conductor of claim 1, wherein the following relationship is satisfied:
0.21≦x≦0.58;
a≧−0.054x+0.441; and
a≦−0.027x+0.886.