Proton conductor

Patent metadata

Field	Value
Publication number	US-9514855-B2
Application number	US-201414469165-A
Country	US
Kind code	B2
Filing date	Aug 26, 2014
Priority date	Jan 31, 2014
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

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 A a B 1-x B′ x O 3-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, 0.0<x≦0.5, and 0.0<δ<3; and
charge of the compositional formula is deviated from electrical neutrality in a range of −0.13 or more but less than 0, where the charge of the compositional formula equals (2×a)+(4×(1−x))+(3×x)−(2×(3−δ)).

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 Corp
• Panasonic Ip Man Co Ltd

Inventors

• Zenitani Yuji
• Nishihara Takashi
• Asano Tetsuya

Classifications

• C01G25/006

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

• H01B1/08

  oxides · CPC title

• H01B1/00 Primary

  Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors · CPC title

• C01P2002/34

  perovskite-type (ABO3) · CPC title

• C01P2006/40

  Electric properties · CPC title