Nippon Steel Sumitomo Metal Corporation

Nippon Steel & Sumikin Chemical Co., Ltd.

Masakazu Higuchi

Hiroyuki Hayashida

Takashi Iijima

Kazuhiko Mizuuchi

Masataka Hiyoshi

Nobuyuki Nishi

Katsumasa Matsumoto

Masakazu Katayama

Takumi Kouno

Provided are: a supporting carbon material for a solid polymer fuel cell, said supporting carbon material making it possible to produce a high-performance solid polymer fuel cell in which there is little decrease in power generation performance as a result of repeated battery load fluctuation that inevitably occurs during operation of the solid polymer fuel cell; and a catalyst metal particle-supporting carbon material. The present invention relates to: a supporting carbon material for a solid polymer fuel cell, said supporting carbon material being a porous carbon material in which the specific surface area of mesopores having a pore diameter of 2-50 nm according to nitrogen adsorption measurement is 600-1,600 m/g, the relative intensity ratio (IG'/IG) of the peak intensity (IG&#x2032;) of the G-band 2,650-2,700 cmrange to the peak intensity (IG) of the G-band 1,550-1,650 cmrange in the Raman spectrum is 0.8-2.2, and the peak position of the G&#x2032;-band is 2,660-2,670 cm; and a catalyst metal particle-supporting carbon material.

Supporting carbon material for solid polymer fuel cell and catalyst metal particle-supporting carbon material

Provided are a supporting carbon material for a solid polymer fuel cell and a metal-catalyst-particle-supporting carbon material that, when used as a carrier for a solid polymer fuel cell catalyst, have excellent power generation performance in high-humidity conditions, which are conditions in which solid polymer fuel cells are operated. A supporting carbon material for a solid polymer fuel cell and a metal-catalyst-particle-supporting carbon material characterized in being a porous carbon material, the hydrogen content being 0.004-0.010% by mass, the nitrogen adsorption BET specific surface area being 600 m/g-1500 m/g, and the relative intensity ratio (I/I) between the peak intensity (I) in the range of 1200-1400 cmknown as the D-band and the peak intensity (I) in the range of 1500-1700 cmknown as the G-band, obtained from the Raman spectrum, being 1.0-2.0.

Carbon support material for solid polymer type fuel cell use and metal catalyst particle- supporting carbon material and methods of production of same

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Kitakyushushi, Japan

Masakazu Higuchi