Mesoporous carbon, electrode catalyst for fuel cell, and catalyst layer

Patent metadata

Field	Value
Publication number	US-12592394-B2
Application number	US-202318182472-A
Country	US
Kind code	B2
Filing date	Mar 13, 2023
Priority date	Mar 17, 2022
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

Mesoporous carbon includes a linked structure in which carbon particles are linked. The carbon particles have primary pores and are primary particles. An average entrance diameter of the primary pores is 2.0 nm or more and 3.0 nm or less. An average constriction diameter of the primary pores is 1.6 nm or more and 2.4 nm or less. An electrode catalyst for a fuel cell includes the mesoporous carbon and catalyst particles supported in the primary pores of the mesoporous carbon. A catalyst layer includes the electrode catalyst for a fuel cell and a catalyst layer ionomer.

First claim

What is claimed is:

1 . Mesoporous carbon comprising:
a linked structure in which carbon particles are linked, wherein the carbon particles have primary pores and are primary particles, an average entrance diameter of the primary pores is 2.0 nm or more and 3.0 nm or less, and an average constriction diameter of the primary pores is 1.6 nm or more and 2.4 nm or less, the average entrance diameter being an average of circle equivalent diameters at entrances of the primary pores that are open to surfaces of the carbon particles, as measured by three-dimensional transmission electron microscope image analysis, and the average constriction diameter being an average of circle equivalent diameters of constrictions of the primary pores inside the carbon particles, as measured by the three-dimensional transmission electron microscope image analysis;
wherein the mesoporous carbon exhibits a high temperature and low humidity voltage of 570 mV or more.

2 . The mesoporous carbon according to claim 1 , wherein an average particle size of the carbon particles is 30 nm or more and 300 nm or less.

3 . An electrode catalyst for a fuel cell, the electrode catalyst comprising:
the mesoporous carbon according to claim 1 ; and catalyst particles supported in the primary pores of the mesoporous carbon.

4 . A catalyst layer comprising:
the electrode catalyst according to claim 3 ; and a catalyst layer ionomer.

Assignees

• Toyota Motor Co Ltd
• Cataler Corp

Inventors

• Hasegawa Naoki
• Yano Kazuhisa
• Takeshita Tomohiro
• Imoto Rui
• Nomura Kumiko
• Wang Yunan
• Matsumura Yuko
• Kasama Yuuki

Classifications

• H01M8/1039 Primary

  halogenated, e.g. sulfonated polyvinylidene fluorides · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• C01B32/00

  Carbon; Compounds thereof (C01B21/00, C01B23/00 take precedence; percarbonates C01B15/10; carbon black C09C1/48) · CPC title

• H01M4/8605

  Porous electrodes · CPC title