US 12,142,770 B2
Carbon material for use as catalyst carrier of polymer electrolyte fuel cell and method of producing the same
Takashi Iijima, Tokyo (JP); Kenichiro Tadokoro, Tokyo (JP); Masataka Hiyoshi, Tokyo (JP); Shinya Furukawa, Tokyo (JP); Tomoko Komura, Tokyo (JP); Kazuyoshi Masaki, Tokyo (JP); Hiroyuki Hayashida, Tokyo (JP); and Wakana Tada, Tokyo (JP)
Assigned to NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., Tokyo (JP)
Appl. No. 16/499,640
Filed by NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., Tokyo (JP)
PCT Filed Apr. 2, 2018, PCT No. PCT/JP2018/014152
§ 371(c)(1), (2) Date Sep. 30, 2019,
PCT Pub. No. WO2018/182045, PCT Pub. Date Oct. 4, 2018.
Claims priority of application No. 2017-071626 (JP), filed on Mar. 31, 2017.
Prior Publication US 2020/0119367 A1, Apr. 16, 2020
Int. Cl. H01M 4/90 (2006.01); B01J 21/18 (2006.01); B01J 35/60 (2024.01); B01J 37/04 (2006.01); B01J 37/06 (2006.01); B01J 37/08 (2006.01); H01M 4/88 (2006.01); H01M 8/10 (2016.01)
CPC H01M 4/9083 (2013.01) [B01J 21/18 (2013.01); B01J 35/60 (2024.01); B01J 37/04 (2013.01); B01J 37/06 (2013.01); B01J 37/084 (2013.01); H01M 4/8807 (2013.01); H01M 4/881 (2013.01); H01M 2008/1095 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A carbon material for use as a catalyst carrier for a polymer electrolyte fuel cell, having a three-dimensional dendritic structure in which a rod-shaped body or a ring-shaped body is branched three-dimensionally, the carbon material being a porous carbon material made from a silver acetylide and satisfying the following (1), (2), (3), and (4) at the same time:
(1) a content of a crystallized material defined below is 1.2 or more and 1.6 or less,
wherein the content of the crystallized material is determined by [(C/A)−(B/A)], when the carbon material for use as a catalyst carrier is heated at 2050° C. in an inert atmosphere for 1 hour and powder X-ray diffractometry is performed, and a height of a baseline of a diffraction peak of a (002) plane at the location of a second peak appearing near a diffraction angle of 25.5° to 26.5° is defined as the A value, a height of a baseline of the second peak near the diffraction angle of 25.5° to 26.5° at the location of the second peak appearing near the diffraction angle of 25.5° to 26.5° is defined as the B value, and an intensity of the second peak near the diffraction angle of 25.5° to 26.5° is defined as the C value;
(2) a BET specific surface area obtained by a BET analysis of a nitrogen gas adsorption isotherm is from 400 to 1500 m2/g;
(3) a cumulative pore volume V2-10 with respect to a pore diameter of from 2 to 10 nm obtained by an analysis of a nitrogen gas adsorption isotherm using the Dollimore-Heal method is from 0.4 to 1.5 mL/g; and
(4) a nitrogen gas adsorption amount Vmacro between a relative pressure of 0.95 and 0.99 in a nitrogen gas adsorption isotherm is from 300 to 1200 cc/g in standard temperature and pressure (STP).