Proton conductor

Patent metadata

Field	Value
Publication number	US-2017076832-A1
Application number	US-201615341686-A
Country	US
Kind code	A1
Filing date	Nov 2, 2016
Priority date	Jan 31, 2014
Publication date	Mar 16, 2017
Grant date	—

Abstract

An exemplary proton conductor according to the present disclosure has a perovskite-type crystal structure expressed by the compositional formula A a B 1−x B′ x O 3−δ , where A is at least one selected from among group 2 elements; B is a group 4 element or Ce; B′ is a group 3 element, a group 13 element, or a lanthanoid element; 0.5<a≦1.0, 0.0≦x≦0.5, and 0.0≦δ<3; and the charge of the above compositional formula is deviated from electrical neutrality in a range of −0.13 or more but less than +0.14.

First claim

What is claimed is:

1 . A proton conductor having a perovskite-type crystal structure expressed by the compositional formula AaB1−xB′xO3−δ, wherein,
A is at least one selected from among group 2 elements;
B is at least one selected from among group 4 elements and Ce;
B′ is a group 3 element, a group 13 element, or a lanthanoid element;
0.5<a≦1.0, x=0, and 0.0≦δ<3; and
charge of the compositional formula is deviated from electrical neutrality in a range of more than 0 but less than +0.14.

2 . The proton conductor of claim 1 , wherein,
A is at least one selected from the group consisting of Ba, Sr, and Ca; B is at least one selected from the group consisting of Zr, Ce, and Ti; and B′ is one selected from the group consisting of Yb, Y, Nd, and In.

3 . The proton conductor of claim 1 , wherein the values a, x and δ are determined based on quantitative measurements of elements composing the proton conductor.

4 . 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.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Zenitani Yuji
• Nishihara Takashi
• Asano Tetsuya

Classifications

• H01B1/02 Primary

  mainly consisting of metals or alloys · CPC title

• C01P2006/40

  Electric properties · CPC title

• C01P2002/34

  perovskite-type (ABO3) · CPC title

• C01G25/006

  Compounds containing zirconium, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• Y02E60/50

  Fuel cells · CPC title