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

Patent metadata

Field	Value
Publication number	US-10096837-B2
Application number	US-201515126638-A
Country	US
Kind code	B2
Filing date	Mar 19, 2015
Priority date	Mar 19, 2014
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

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 2 /g, the relative intensity ratio (IG′/IG) of the peak intensity (IG′) of the G-band 2,650-2,700 cm −1 range to the peak intensity (IG) of the G-band 1,550-1,650 cm −1 range in the Raman spectrum is 0.8-2.2, and the peak position of the G′-band is 2,660-2,670 cm −1 ; and a catalyst metal particle-supporting carbon material.

First claim

The invention claimed is:

1. A supporting carbon material for a solid polymer fuel cell comprised of a porous carbon material having a specific surface area S A of mesopores of a pore size of 2 to 50 nm, found by analyzing a nitrogen adsorption isotherm of an adsorption process by the Dollimore-Heal method, of 600 m 2 /g to 1600 m 2 /g, having a relative intensity ratio (IG′/IG) of a peak intensity (IG′) of a peak present in the G′-band of 2650 to 2700 cm −1 in range at a Raman spectrum and a peak intensity (IG) of a peak present in the G-band of 1550 to 1650 cm −1 of 0.8 to 2.2, and having a peak position of the G′-band of 2660 to 2670 cm −1 .

2. The supporting carbon material for a solid polymer fuel cell according to claim 1 wherein in said mesopores, mesopores with a pore size of 2 nm to less than 10 nm have a specific pore area S 2-10 of 400 m 2 /g to 1100 m 2 /g, mesopores with a pore size of 2 nm to less than 10 nm have a specific pore volume V 2-10 of 0.4 cc/g to 1.6 cc/g, and mesopores with a pore size of 10 nm to 50 nm have a specific pore area S 10-50 of 20 m 2 /g to 150 m 2 /g, and micropores of a pore size of less than 2 nm, found by analyzing a nitrogen adsorption isotherm of an adsorption process by the Horvath-Kawazoe method, have a pore area S 2 of 250 m 2 /g to 550 m 2 /g.

3. The supporting carbon material for a solid polymer fuel cell according to claim 2 wherein said specific pore area S 2-10 is 400 m 2 /g to 1000 m 2 /g, said specific pore volume V 2-10 is 0.4 cc/g to 1.4 cc/g, said specific pore area S 10-50 is 30 m 2 /g to 100 m 2 /g, and said specific pore area S 2 is 300 m 2 /g to 500 m 2 /g.

4. The supporting carbon material for a solid polymer fuel cell according to claim 1 wherein a specific surface area S BET by the BET method is 600 m 2 /g to 1500 m 2 /g, the DBP oil absorption X is 200 cm 3 /100 g to 650 cm 3 /100 g, a ratio (X/S BET ) of said DBP oil absorption X and said specific surface area S BET is 3 nm to 5 nm, and a half width of a peak present in the range of 1550 to 1650 cm −1 called the G-band is 30 cm −1 to 75 cm −1 .

5. The supporting carbon material for a solid polymer fuel cell according to claim 4 wherein said specific surface area S BET is 800 m 2 /g to 1300 m 2 /g, said DBP oil absorption X is 300 cm 3 /100 g to 550 cm 3 /100 g, the ratio (X/S BET ) of said DBP oil absorption X and said specific surface area S BET is 3 nm to 5 nm, and said half width is 50 cm −1 to 70 cm −1 .

6. The supporting carbon material for a solid polymer fuel cell according to claim 1 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a relative intensity ratio (IG′/IG) of the G′-band and G-band is 1.0 to 2.0.

7. The supporting carbon material for a solid polymer fuel cell according to claim 1 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a peak position of the G′-band is 2662 to 2668 cm −1 .

8. The supporting carbon material for a solid polymer fuel cell according to claim 1 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g, a relative intensity ratio (IG′/IG) of the G′-band and G-band is 1.0 to 2.0, and a peak position of the G′-band is 2662 to 2668 cm −1 .

9. A catalyst metal particle-supporting carbon material for a solid polymer fuel cell comprised of a supporting carbon material for a solid polymer fuel cell according to claim 1 on which platinum alone or mainly platinum catalyst metal particles are supported.

10. The supporting carbon material for a solid polymer fuel cell according to claim 2 wherein a specific surface area S BET by the BET method is 600 m 2 /g to 1500 m 2 /g, the DBP oil absorption X is 200 cm 3 /100 g to 650 cm 3 /100 g, a ratio (X/S BET ) of said DBP oil absorption X and said specific surface area S BET is 3 nm to 5 nm, and a half width of a peak present in the range of 1550 to 1650 cm −1 called the G-band is 30 cm −1 to 75 cm −1 .

11. The supporting carbon material for a solid polymer fuel cell according to claim 3 wherein a specific surface area S BET by the BET method is 600 m 2 /g to 1500 m 2 /g, the DBP oil absorption X is 200 cm 3 /100 g to 650 cm 3 /100 g, a ratio (X/S BET ) of said DBP oil absorption X and said specific surface area S BET is 3 nm to 5 nm, and a half width of a peak present in the range of 1550 to 1650 cm −1 called the G-band is 30 cm −1 to 75 cm −1 .

12. The supporting carbon material for a solid polymer fuel cell according to claim 2 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a relative intensity ratio (IG′/IG) of the G′-band and G-band is 1.0 to 2.0.

13. The supporting carbon material for a solid polymer fuel cell according to claim 3 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a relative intensity ratio (IG′/IG) of the G′-band and G-band is 1.0 to 2.0.

14. The supporting carbon material for a solid polymer fuel cell according to claim 4 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a relative intensity ratio (IG′/IG) of the G′-band and G-band is 1.0 to 2.0.

15. The supporting carbon material for a solid polymer fuel cell according to claim 5 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a relative intensity ratio (IG′/IG) of the G′-band and G-band is 1.0 to 2.0.

16. The supporting carbon material for a solid polymer fuel cell according to claim 2 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a peak position of the G′-band is 2662 to 2668 cm −1 .

17. The supporting carbon material for a solid polymer fuel cell according to claim 3 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a peak position of the G′-band is 2662 to 2668 cm −1 .

18. The supporting carbon material for a solid polymer fuel cell according to claim 4 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a peak position of the G′-band is 2662 to 2668 cm −1 .

19. The supporting carbon material for a solid polymer fuel cell according to claim 5 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g and a peak position of the G′-band is 2662 to 2668 cm −1 .

20. The supporting carbon material for a solid polymer fuel cell according to claim 2 wherein said specific surface area S A is 700 m 2 /g to 1400 m 2 /g, a relative intensity ratio (IG′/IG) of the G′-band and G-band is 1.0 to 2.0, and a peak position of the G′-band is 2662 to 2668 cm −1 .

Assignees

• Nippon Steel & Sumitomo Metal Corp
• Nippon Steel & Sumikin Chem Co

Inventors

• Iijima Takashi
• Hiyoshi Masataka
• Matsumoto Katsumasa
• Hayashida Hiroyuki
• Mizuuchi Kazuhiko
• Kouno Takumi
• Higuchi Masakazu
• Katayama Masakazu

Classifications

• H01M4/8807 Primary

  Gas diffusion layers · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• C01B31/02

  Chemistry & Metallurgy · mapped topic

• C01P2006/14

  Pore volume · CPC title

• C01P2006/12

  Surface area · CPC title