Membrane electrode assembly and fuel cell using same
A technology of electrode assembly and electrode catalyst, which is applied in the direction of fuel cells, fuel cell parts, battery electrodes, etc., can solve the problems of insufficient current density of fuel cells, and achieve the effect of excellent current density
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Embodiment 1
[0171] · Preparation of metal complex (A)
[0172] The metal complex (A) was produced by the following method.
[0173]
[0174] (In the formula, Me represents a methyl group, Et represents an ethyl group, and Ac represents an acetyl group)
[0175] The ligand compound as a raw material was synthesized according to the method described in "Tetrahedron", Vol.55, p.8377 (1999).
[0176] Next, under a nitrogen atmosphere, 200 ml of 2-methoxyethanol solution containing 1.388 g of the ligand compound and 1.245 g of cobalt acetate tetrahydrate was packed into a 500 ml eggplant-shaped bottle, and stirred for 2 hours while heating to 80° C. A brown solid resulted. The brown solid was filtered off, washed with 20 ml of 2-methoxyethanol, and dried to obtain a metal complex (A) (yield: 1.532 g, yield: 74%). It should be noted that, in the metal complex (A) in the above reaction formula, "(OAc)2" means that there are 2 equivalents of acetate ions as counter ions, and "MeOEtOH" means...
Embodiment 2
[0208] ・Manufacture of ionomer (B)
[0209] Under an argon atmosphere, 14.6 g (66.7 mmol) of anhydrous nickel bromide and 180 g of NMP were mixed in the flask, and it heated up to internal temperature 70 degreeC, and stirred for 1 hour. After cooling the obtained mixture to 60°C, 11.5 g (73.5 mmol) of 2,2'-bipyridine was added thereto, and cooled to 40°C while stirring to prepare a nickel-containing solution (B).
[0210] Under an argon atmosphere, 20.0 g (38.2 mmol) of 4,4'-dichlorobiphenyl-2,2'-disulfonic acid bis(2,2-dimethylpropyl ester) and 2 After dissolving 7.2 g (28.7 mmol) of 5-dichlorobenzophenone in 380 g of NMP, the temperature in the flask was adjusted to 50°C. 8.7 g (133.7 mmol) of zinc powders were added to the obtained solution, and it cooled to 40 degreeC, stirring. The above-mentioned nickel-containing solution (B) was injected thereinto, and a polymerization reaction was carried out at 40° C. for 5 hours as it was, to obtain a black polymerization solution...
Embodiment 3
[0222] ・Manufacture of base metal electrode catalyst (B)
[0223] Metal complex (A), benzimidazole, and carbon support (trade name: BLACK PEARLS2000, manufactured by Cabot Co.) were mixed at a mass ratio of 1:1:4, stirred in ethanol at room temperature for 15 minutes, It was dried under a reduced pressure of 200 Pa at room temperature for 12 hours. The resulting mixture was heated at 800° C. for 2 hours under a nitrogen flow of 200 ml / min using a tube furnace having a quartz core tube, whereby a base metal electrode catalyst (B) was obtained.
[0224] ・Manufacture of ionomer (C)
[0225] Under an argon atmosphere, 15.2 g (69.6 mmol) of anhydrous nickel bromide and 180 g of NMP were mixed in the flask, and it heated up to internal temperature 70 degreeC, and stirred for 1 hour. After cooling the obtained mixture to 60°C, 12.0 g (76.5 mmol) of 2,2'-bipyridine was added thereto, and cooled to 30°C while stirring to prepare a nickel-containing solution (C).
[0226] Under an ar...
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