Membrane electrode assembly of electrochemical device, membrane electrode assembly of fuel cell, fuel cell, membrane electrode assembly of electrochemical hydrogen pump, electrochemical hydrogen pump, membrane electrode assembly of hydrogen sensor, and hydrogen sensor

Patent metadata

Field	Value
Publication number	US-11515546-B2
Application number	US-202017028009-A
Country	US
Kind code	B2
Filing date	Sep 22, 2020
Priority date	Apr 19, 2016
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A membrane electrode assembly of an electrochemical device includes a proton conductive solid electrolyte membrane and an electrode including Ni and an electrolyte material which contains as a primary component, at least one of a first compound having a composition represented by BaZr1-x1M1x1O3 (M1 represents at least one element selected from trivalent elements each having an ion radius of more than 0.720 A° to less than 0.880 A°, and 0<x1<1 holds) and a second compound having a composition represented by BaZr1-x2Tmx2O3 (0<x2<0.3 holds).

First claim

What is claimed is:

1. A membrane electrode assembly of an electrochemical device, the membrane electrode assembly comprising:
a proton conductive solid electrolyte membrane; and
an electrode including Ni and an electrolyte material which contains as a primary component, at least one of a first compound having a composition represented by BaZr 1-x1 M 1 x1 O 3 , where M 1 represents at least one element selected from the group consisting of Sc and Lu, and 0<x1<1.

2. The membrane electrode assembly of the electrochemical device according to claim 1 ,
wherein the electrode contains no compound having a composition represented by BaZr 1-x3 M 3 x3 O 3 (M 3 represents at least one element selected from Er, Y, Ho, Dy, and Gd, and 0<x 3 <1 holds).

3. The membrane electrode assembly of the electrochemical device according to claim 1 ,
wherein M 1 represents Sc.

4. The membrane electrode assembly of the electrochemical device according to claim 1 ,
wherein M 1 represents Lu.

5. The membrane electrode assembly of the electrochemical device according to claim 1 ,
wherein the solid electrolyte membrane includes a first solid electrolyte membrane which includes the electrolyte material containing as the primary component, at least one of a fourth compound having a composition represented by BaZr 1-x4 M 4 x4 O 3 , where M 4 represents at least one element selected from trivalent elements each having an ion radius of more than 0.720 A° to less than 0.880 A°, and 0<x 4 <1 holds, and a fifth compound having a composition represented by BaZr 1-x5 Tm x5 O 3 , where 0<x 5 <0.3 holds, and
the electrode is in contact with the first solid electrolyte membrane.

6. The membrane electrode assembly of the electrochemical device according to claim 5 ,
wherein M 4 represents at least one element selected from Sc, In, Lu, and Yb.

7. The membrane electrode assembly of the electrochemical device according to claim 5 ,
wherein the solid electrolyte membrane further includes a second solid electrolyte membrane containing a sixth compound having a composition represented by one of BaZr 1-x6 M 6 x6 O 3 , BaCe 1-x7 M 7 x7 O 3 , and BaZr 1-x8-y8 Ce x8 M 8 y8 O 3 , where M 6 , M 7 , and M 8 each represent at least one element selected from 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 6 <1, 0<x 7 <1, 0<x 8 <1, and 0<y 8 <1 hold,
the first solid electrolyte membrane is in contact at one side surface thereof with the electrode and is in contact with the second solid electrolyte membrane at the other side surface opposite to the one side surface, and
the electrode, the first solid electrolyte membrane, and the second solid electrolyte membrane are laminated to each other in this order.

8. A fuel cell comprising:
a proton conductive solid electrolyte membrane;
an anode including Ni and an electrolyte material which contains as a primary component, at least one of a first compound having a composition represented by BaZr 1-x1 M 1 x1 O 3 , where M 1 represents at least one element selected from the group consisting of Sc and Lu, and 0<X1<1;
a cathode;
an anode gas path supplying a hydrogen-containing gas to the anode; and
a cathode gas path supplying an oxidant gas to the cathode,
wherein the solid electrolyte membrane is in contact at one side surface thereof with the anode and in contact with the cathode at the other side surface opposite to the one side surface,
the anode, the solid electrolyte membrane, and the cathode are laminated to each other in this order, and
the hydrogen-containing gas contains CO 2 .

9. The fuel cell according to claim 8 ,
further comprising a reformer which reforms a raw material to be supplied and generates the hydrogen-containing gas.

10. The membrane electrode assembly of the electrochemical device according to claim 1 ,
wherein 0.2≤x 1 <1.

11. The membrane electrode assembly of the electrochemical device according to claim 8 ,
wherein 0.2≤x 1 <1.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yamauchi Kosuke
• Goto Takehito
• Kamata Tomoya
• Mikami Yuichi
• Kuroha Tomohiro
• Okaichi Atsuo
• Tsuji Yoichiro
• Okuyama Yuji

Classifications

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01G25/006

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

• H01M8/0618

  Reforming processes, e.g. autothermal, partial oxidation or steam reforming · CPC title

• H01M8/1226

  characterised by the supporting layer · CPC title

• Y02E60/50

  Fuel cells · CPC title