Electrode, membrane electrode assembly, electrochemical cell, stack, fuel cell, vehicle and flying object

Patent metadata

Field	Value
Publication number	US-2019088967-A1
Application number	US-201815907902-A
Country	US
Kind code	A1
Filing date	Feb 28, 2018
Priority date	Sep 21, 2017
Publication date	Mar 21, 2019
Grant date	—

Abstract

An electrode of an embodiment includes a catalyst layer having pores. A mode diameter of the pores is 10 μm or more and 100 μm or less.

First claim

What is claimed is:

1 . An electrode comprising a catalyst layer having pores,
wherein a mode diameter of the pores is 10 μm or more and 100 μm or less.

2 . The electrode according to claim 1 , wherein the catalyst layer has a thickness of 0.05 μm or more and 3.0 μm or less.

3 . The electrode according to claim 1 , wherein a value of the mode diameter of the pores is three times or more a value of a thickness of the catalyst layer.

4 . The electrode according to claim 1 , wherein a value of the mode diameter of the pores is ten times or more a value of a thickness of the catalyst layer.

5 . The electrode according to claim 1 , wherein the mode diameter of the pores is 10 μm or more and 50 μm or less.

6 . The electrode according to claim 1 , wherein an area ratio of the pores is 20% or more and 60% or less.

7 . The electrode according to claim 1 , wherein the catalyst layer has a porous structure or a laminated structure.

8 . The electrode according to claim 1 , wherein the catalyst layer has porosity of 50 Vol. % or more and 90 Vol. % or less.

9 . The electrode according to claim 1 , wherein an area ratio of the pores having a diameter of 10 μm or more in the catalyst layer is 10% or more and 55% or less.

10 . The electrode according to claim 1 , further comprising a crack connecting the pores,
wherein a length/width of the crack, which is an aspect ratio of the crack, is 10 or more.

11 . The electrode according to claim 1 , further comprising a support,
wherein the support includes a water management layer and a gas diffusion layer, and the water management layer is disposed between the catalyst layer and the gas diffusion layer.

12 . The electrode according to claim 11 , wherein the water management layer has a thickness of 2 μm or more and 70 μm or less.

13 . A membrane electrode assembly using the electrode according to claim 1 .

14 . An electrochemical cell using the membrane electrode assembly according to claim 13 .

15 . A stack using the membrane electrode assembly according to claim 13 .

16 . A fuel cell using the membrane electrode assembly according to claim 13 .

17 . The fuel cell using the electrochemical cell according to claim 14 .

18 . The fuel cell using the stack according to claim 15 .

19 . A vehicle using the fuel cell according to claim 16 .

20 . A flying object using the fuel cell according to claim 16 .

Assignees

• Toshiba Kk

Inventors

• Fukazawa Taishi
• Mei Wu
• Kanai Yuta

Classifications

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M8/1004 Primary

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M4/64

  Carriers or collectors · CPC title

• H01M8/04291

  Arrangements for managing water in solid electrolyte fuel cell systems (H01M8/04119 takes precedence) · CPC title

• H01M8/242

  comprising framed electrodes or intermediary frame-like gaskets (H01M8/2425, H01M8/244 take precedence) · CPC title