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Bipolar plate for hydrogen fuel cell, preparation method thereof and hydrogen fuel cell

A fuel cell and bipolar plate technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of not being able to take into account the performance advantages of graphite-type plates

Active Publication Date: 2022-02-11
SHANGHAI HONGFENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the existing bipolar plates used in hydrogen fuel cells, which cannot take into account the performance advantages of graphite type and metal type plates, and provide a bipolar plate for hydrogen fuel cells. Plate and its preparation method and hydrogen fuel cell

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] After mixing graphene oxide and sodium polystyrene sulfonate solution with a mass fraction of 5% at a mass ratio of 1:5, ultrasonically disperse for 3 hours at a frequency of 55 kHz, and then filter it with suction at a temperature of 100 ° C. Drying under conditions to constant weight, discharging, to obtain pretreated graphene oxide; after mixing pretreated graphene oxide and aniline solution with a concentration of 0.1mol / L at a mass ratio of 1:5, under the condition of a frequency of 55kHz, Ultrasonic dispersion for 10 minutes to obtain a dispersion;

[0030] A 410 stainless steel plate with a thickness of 0.3 mm was taken, polished with sandpaper, oxidized with nitric acid and cleaned with acetone, rinsed with deionized water, dried, and then punched with a hole diameter of 0.1 mm. The number of holes is 1 / cm 2 , to pre-treat the stainless steel plate;

[0031] Then stamp the pretreated stainless steel plate with a sawtooth mold to form a wave shape, and reasonab...

Embodiment 2

[0036] After mixing graphene oxide and sodium polystyrene sulfonate solution with a mass fraction of 8% at a mass ratio of 1:5, ultrasonically disperse for 3 hours at a frequency of 55 kHz, and then filter it with suction at a temperature of 100 ° C. Drying under conditions to constant weight, discharging, to obtain pretreated graphene oxide; after mixing pretreated graphene oxide and aniline solution with a concentration of 0.1mol / L at a mass ratio of 1:5, under the condition of a frequency of 55kHz, Ultrasonic dispersion for 10 minutes to obtain a dispersion;

[0037] A 410 stainless steel plate with a thickness of 0.5 mm was taken, polished with sandpaper, oxidized with nitric acid and cleaned with acetone, rinsed with deionized water, dried, and then punched with a hole diameter of 0.2 mm. The number of holes is 1 / cm 2 , to pre-treat the stainless steel plate;

[0038] Then stamp the pretreated stainless steel plate with a sawtooth mold to form a wave shape, and reasonab...

Embodiment 3

[0043] Mix graphene oxide and sodium polystyrene sulfonate solution with a mass fraction of 10% at a mass ratio of 1:8, and then ultrasonically disperse it at a frequency of 75 kHz for 5 hours, and then filter it with suction at a temperature of 120°C. Drying under conditions to constant weight, discharging, to obtain pretreated graphene oxide; after mixing pretreated graphene oxide and aniline solution with a concentration of 0.2mol / L at a mass ratio of 1:10, under the condition of a frequency of 75kHz, Ultrasonic dispersion for 15 minutes to obtain a dispersion;

[0044] A 410 stainless steel plate with a thickness of 1.0 mm was taken, polished with sandpaper, oxidized with nitric acid and cleaned with acetone, rinsed with deionized water, dried, and then punched with a hole diameter of 0.3 mm. The number of holes is 1 / cm 2 , to pre-treat the stainless steel plate;

[0045] Then stamp the pretreated stainless steel plate with a sawtooth mold to form a wave shape, and reaso...

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Abstract

The invention belongs to the technical field of new energy, and particularly relates to a bipolar plate for a hydrogen fuel cell, a preparation method thereof and the hydrogen fuel cell. The product developed by the invention comprises a metal substrate and a graphene coating coated on the surface of the metal substrate; the metal substrate is in a wave shape, wave crests and wave troughs are formed on the surface of the substrate, the wave troughs are formed between every two adjacent wave crests on the same side of the metal substrate, and the graphene coatings are arranged in the wave troughs and fill the wave troughs. In addition, through holes are formed in the connecting sections connecting the wave crests on one side of the metal substrate and the wave crests on the other side of the metal substrate so that the wave troughs arranged on the two sides of the connecting sections can be communicated. The graphene coating comprises reduced graphene, the reduced graphene is of a lamellar structure, and sodium polystyrenesulfonate is clamped in the lamellar structure. The product obtained by the invention can effectively exert the technical effects of two materials of metal and graphene, and the hydrogen fuel cell with excellent comprehensive performance is obtained.

Description

technical field [0001] The invention belongs to the technical field of new energy. More specifically, it relates to a hydrogen fuel cell bipolar plate, a preparation method thereof, and a hydrogen fuel cell. Background technique [0002] Hydrogen fuel cells are different from common lithium batteries, and the system is more complex, mainly composed of stacks and system components (air compressors, humidifiers, hydrogen circulation pumps, hydrogen bottles). The stack is the core of the entire battery system, including each battery unit composed of membrane electrodes, bipolar plates, current collector plates, end plates, sealing rings, etc. The key materials of membrane electrodes are proton exchange membrane, catalyst, and gas diffusion layer. The durability (and other properties) of these components and materials determine the service life and working condition adaptability of the stack. In recent years, research on hydrogen fuel cell technology has focused on stacks, bip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M8/1006
CPCH01M4/86H01M8/1006Y02E60/50
Inventor 洪群芳
Owner SHANGHAI HONGFENG IND