Membrane electrode assembly and solid oxide fuel battery using same

Patent metadata

Field	Value
Publication number	US-2021399324-A1
Application number	US-202117463629-A
Country	US
Kind code	A1
Filing date	Sep 1, 2021
Priority date	Apr 25, 2019
Publication date	Dec 23, 2021
Grant date	—

Abstract

A membrane electrode assembly according to the present disclosure includes an electrode, an electrolyte layer bonded to the electrode and containing an electrolyte having proton conductivity, a metal frame, and a bonding layer disposed between a peripheral part of the electrolyte layer and the metal frame and held in contact with each of the electrolyte layer and the metal frame, wherein the bonding layer has a thickness of greater than or equal to 0.50 mm.

First claim

What is claimed is:

1 . A membrane electrode assembly comprising:
an electrode; an electrolyte layer bonded to the electrode and containing an electrolyte having proton conductivity; a metal frame; and a bonding layer disposed between a peripheral part of the electrolyte layer and the metal frame and held in contact with each of the electrolyte layer and the metal frame, wherein the bonding layer has a thickness of greater than or equal to 0.50 mm.

2 . The membrane electrode assembly according to claim 1 , wherein the bonding layer contains glass.

3 . The membrane electrode assembly according to claim 1 , wherein the electrode contains metal activating oxidation reaction of hydrogen.

4 . The membrane electrode assembly according to claim 3 , wherein the metal contains at least one selected from the group consisting of Ni, Pt, Pd, and Ir.

5 . The membrane electrode assembly according to claim 1 , wherein the electrolyte contains at least one selected from the group consisting of Ba a Zr 1-x M x O 3 , Ba a Ce 1-x M x O 3 , and Ba a Zr 1-x-y Ce x M y O 3 ,
M contains at least one 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 0<x<1, 0<y<1, and 0.95≤a≤1.05 are satisfied.

6 . The membrane electrode assembly according to claim 5 , wherein M contains at least one selected from the group consisting of Sc, Lu, Yb, Tm, and In.

7 . The membrane electrode assembly according to claim 1 , wherein the electrode has a greater thickness than the electrolyte layer.

8 . The membrane electrode assembly according to claim 1 , wherein the bonding layer has a thickness of smaller than or equal to 2.0 mm.

9 . The membrane electrode assembly according to claim 2 , wherein the glass is borosilicate glass.

10 . A fuel battery comprising:
a fuel electrode; an air electrode; and an electrolyte layer disposed between the fuel electrode and the air electrode, wherein the fuel electrode and the electrolyte layer are constituted as components of the membrane electrode assembly according to claim 1 .

11 . An electrochemical device comprising:
a fuel electrode; an air electrode; and an electrolyte layer disposed between the fuel electrode and the air electrode, wherein the fuel electrode and the electrolyte layer are constituted as components of the membrane electrode assembly according to claim 1 .

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kamata Tomoya
• Kakuwa Takashi
• Kita Hiromi
• Kuroha Tomohiro

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01B1/08

  oxides · CPC title

• H01M2300/0077

  based on zirconium oxide · CPC title

• H01M2300/0074

  Ion conductive at high temperature · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title