Laminated electrolyte membrane, membrane electrode assembly, water electrolysis cell, stack, water electrolyzer, and hydrogen utilizing system

Patent metadata

Field	Value
Publication number	US-2019296364-A1
Application number	US-201816128635-A
Country	US
Kind code	A1
Filing date	Sep 12, 2018
Priority date	Mar 22, 2018
Publication date	Sep 26, 2019
Grant date	—

Abstract

A laminated electrolyte membrane of an embodiment includes: a first electrolyte membrane; a second electrolyte membrane; and a nanosheet laminated catalyst layer provided between the first electrolyte membrane and the second electrolyte membrane and including a laminated structure in which a plurality of nanosheet catalysts is laminated with a gap.

First claim

What is claimed is:

1 . A laminated electrolyte membrane comprising:
a first electrolyte membrane; a second electrolyte membrane; and a nanosheet laminated catalyst layer provided between the first electrolyte membrane and the second electrolyte membrane and including a laminated structure in which a plurality of nanosheet catalysts is laminated with a gap.

2 . The laminated electrolyte membrane according to claim 1 , wherein the nanosheet catalyst contains Pt or a Pt alloy.

3 . The laminated electrolyte membrane according to claim 1 , wherein the nanosheet laminated catalyst layer has a thickness of 10 nm or more and 2000 nm or less.

4 . The laminated electrolyte membrane according to claim 1 , wherein the laminated electrolyte membrane has a membrane thickness of 25 μm or more and 250 μm or less.

5 . The laminated electrolyte membrane according to claim 1 , wherein a radical scavenger or a hydrogen peroxide decomposer is added to the laminated electrolyte membrane.

6 . The laminated electrolyte membrane according to claim 1 , wherein porous carbon or ceramics containing fibrous carbon is contained in the gap.

7 . The laminated electrolyte membrane according to claim 1 , wherein a vacancy area ratio of the laminated structure is 50% or more and 90% or less.

8 . A membrane electrode assembly, wherein a first electrode, a second electrode, and the laminated electrolyte membrane according to claim 1 between the first electrode and the second electrode are provided.

9 . The membrane electrode assembly according to claim 8 , wherein the first electrode is a cathode and the second electrode is an anode.

10 . The membrane electrode assembly according to claim 9 , wherein an electrolyte membrane in contact with the second electrode is a perfluorosulfonic acid based electrolyte membrane.

11 . The membrane electrode assembly according to claim 8 , wherein the nanosheet laminated catalyst layer and the first electrode or the second electrode are separated.

12 . The membrane electrode assembly according to claim 8 , wherein the first electrode includes a laminated structure in which a plurality of nanosheet catalysts is laminated with a gap.

13 . A water electrolysis cell using the membrane electrode assembly according to claim 8 .

14 . A stack using the membrane electrode assembly according to claim 8 .

15 . A stack using the water electrolysis cell according to claim 13 .

16 . A water electrolyzer using the membrane electrode assembly according to claim 8 .

17 . A water electrolyzer using the water electrolysis cell according to claim 13 .

18 . A water electrolyzer using the stack according to claim 14 .

19 . A water electrolyzer using the stack according to claim 15 .

20 . A hydrogen utilizing system using the water electrolyzer according to claim 19 .

Assignees

• Toshiba Kk

Inventors

• Nakano Yoshihiko
• Yoshinaga Norihiro
• Mei Wu
• Fukazawa Taishi

Classifications

• H01M8/1055

  Inorganic layers on the polymer electrolytes, e.g. inorganic coatings · CPC title

• H01M8/241

  with solid or matrix-supported electrolytes · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• H01M4/92

  Metals of platinum group (H01M4/94 {, H01M4/9058} take precedence) · CPC title

• H01M4/881 Primary

  Electrolytic membranes · CPC title