Fuel cell ordered porous nano-fiber single electrode, membrane electrode and preparation method
A nanofiber, fuel cell technology, applied in the direction of fuel cells, battery electrodes, fuel cell components, etc., to achieve the effects of being beneficial to the three-phase interface reaction and particle mass transfer, increasing the catalytic active area, and improving the corrosion resistance.
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Embodiment 1
[0044] Weigh 0.55g of dried polyvinylidene fluoride (PVDF) powder, 2.4g of dimethyl diamide (DMF), and 1.6g of acetone, mix them in a beaker, stir at 50°C for 0.5h with a magnetic stirrer, and prepare Mix the electrospinning polymer liquid well. Fix the gas diffusion layer material on the receiving plate of the electrospinning device, and use polytetrafluoroethylene-treated hydrophobic carbon paper: immerse the carbon paper in the polytetrafluoroethylene hydrophobic agent for 10 minutes, and heat it at 350 ° C. Calcining at lower temperature for 30 minutes, wherein the solid content of polytetrafluoroethylene hydrophobic agent is 10wt%-30wt%. Use a syringe with a specification of 5ml or 10ml to take 2ml of the electrospinning polymer liquid and fix it on the micro-injection pump. The needle port of the syringe is ground into a flat mouth and connected to the output port of the high voltage power supply. Fix hydrophobic carbon paper on grounded aluminum foil as a receiving sc...
Embodiment 2
[0053]Weigh 0.65g of dried PVDF powder, 2.8g of dimethyl diamide (DMF), and 1.8g of acetone, mix them in a beaker, stir at 50°C for 0.5h with a magnetic stirrer, and make a uniformly mixed electrospun The polymer liquid is electrospun on one side of the hydrophobic carbon paper, and the other specific operations are the same as in Example 1. The working voltage is adjusted to 15kv, and the electrospinning time is 15-16 minutes to obtain a porous polymer nanofiber electrospun membrane. The hydrophobic carbon paper adhered with the porous polymer nanofiber electrospun membrane was placed in a vacuum drying oven, kept at a temperature of 60° C., and the solvent was evaporated to obtain a porous polymer nanofiber film. The diameter of the porous polymer nanofiber is about 200 nm, and the film thickness is about 8 μm. The porosity of the porous nanofiber membrane is greater than 90%.
[0054] Put the platinum metal target into the magnetron sputtering apparatus, and the other spe...
Embodiment 3
[0063] Weigh 0.75g of dried PVDF powder, 3.0g of dimethyldiamide (DMF), and 2.0g of acetone, mix them in a beaker, stir them at 50°C for 0.5h with a magnetic stirrer, and make a uniformly mixed electrospun The polymer liquid is electrospun on one side of the hydrophobic carbon paper, and the other specific operations are the same as in Example 1. The working voltage was adjusted to 13 kv, and the electrospinning time was 20 minutes to obtain a porous polymer nanofiber electrospun membrane. The carbon paper deposited with the porous polymer nanofiber electrospun membrane was placed in a vacuum drying oven, kept at a temperature of 60° C. to dry, and the solvent was evaporated to obtain a porous polymer nanofiber film. The diameter of the nanofiber is about 200 nm, and the film thickness is 10 μm. The porosity of the porous polymer nanofiber membrane is greater than 80%.
[0064] Put the platinum metal target into the magnetron sputtering apparatus, and the other specific oper...
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