Electrically conductive material and electrode material

Patent metadata

Field	Value
Publication number	US-2020058945-A1
Application number	US-201816476502-A
Country	US
Kind code	A1
Filing date	Feb 21, 2018
Priority date	Mar 1, 2017
Publication date	Feb 20, 2020
Grant date	—

Abstract

The present invention provides an electrically conductive material having excellent resistance to a high potential and strongly acidic environment and high electrical conductivity; and an electrode material and a fuel cell each including the same. The present invention also provides a method for simply and easily producing such an electrically conductive material. The present invention relates to an electrically conductive material including a titanium suboxide particulate powder, the titanium suboxide particulate powder including a rutile crystalline phase as a main phase, and having a composition of TiO n wherein n is 1.5 or more and 1.90 or less, and a brightness L* in the L*a*b*color system of 35 to 45.

First claim

1 . An electrically conductive material comprising a titanium suboxide particulate powder,
the titanium suboxide particulate powder including a rutile crystalline phase as a main phase, and having a composition of TiO n wherein n is 1.5 or more and 1.90 or less, and a brightness L* in the L*a*b*color system of 35 to 45 .

2 . An electrode material comprising a structure containing a noble metal and/or an oxide thereof supported on the electrically conductive material according to claim 1 .

3 . The electrode material according to claim 2 ,
which is an electrode material for a polymer electrolyte fuel cell.

4 . A fuel cell comprising an electrode that includes the electrode material according to claim 2 .

5 . A method for producing the electrically conductive material according to claim 1 , the method comprising
firing a raw material containing a titanium oxide having a specific surface area of 20 m 2 /g or greater in a reducing atmosphere, followed by firing in an ammonia atmosphere at 500° C. or higher, or firing the raw material in a reducing atmosphere in the presence of ammonia.

Assignees

• Sakai Chemical Industry Co

Inventors

• Yano Seiichi
• Tsutsumi Hiroshi
• Kishi Miho
• Uemura Akihiro
• Ota Mayu

Classifications

• C01P2002/30

  Three-dimensional structures · CPC title

• C01G23/043 Primary

  Titanium sub-oxides · CPC title

• C01P2006/62

  L* (lightness axis) · CPC title

• C01P2002/72

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

• H01B1/00

  Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors · CPC title