High-stability proton exchange membrane fuel cell nanofiber electrode as well as preparation method and application thereof
A proton exchange membrane and nanofiber technology, applied in fuel cells, battery electrodes, circuits, etc., can solve problems such as easy structure collapse, and achieve the effect of improving stability, good pore structure, and large porosity
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Embodiment 1
[0044] Weigh 0.1g of 40wt.% Pt / C catalyst, 0.8g of 5wt.% Nafion solution, add 0.08g of water and 0.3g of isopropanol and ultrasonically mix evenly, then add two polymers of polyacrylic acid and polyvinyl alcohol for a total of 0.02 g, the mass ratio of polyacrylic acid and polyvinyl alcohol is 1:1, and stirred for 36 hours to obtain a catalyst slurry with a viscosity of 110cp. The catalytic layer was prepared by electrospinning technology, and the environmental parameters and control parameters of electrospinning were the same as those in Comparative Example 1. A Pt loading of 0.1 mg cm was obtained by controlling the spinning time -2 The catalytic layer, the thickness of the catalytic layer is about 2 μm. The heat treatment temperature of the prepared catalytic layer is 140° C., the treatment time is 60 minutes, and the treatment atmosphere is air, so that the high molecular weight polymer undergoes esterification reaction. Finally, transfer the heat-treated catalytic layer...
Embodiment 2
[0047] Weigh 0.11g of PtCo / C catalyst, wherein the mass fraction of Pt is 45%, 0.8g of 5wt.% Nafion solution, add 0.1g of water and 0.35g of isopropanol and ultrasonically mix evenly, then add cyclodextrin, polyacrylic acid macromolecule polymerization A total of 0.02g, the mass ratio of cyclodextrin and polyacrylic acid is 1:1, stirring for 24h can obtain a catalyst slurry with a viscosity of 90cp. Then the catalytic layer was prepared by electrospinning technology. The environmental parameters of electrospinning were: temperature 15°C, relative humidity 30%RH; control parameters were: slurry feed rate was 0.8mL / h, voltage was 12.5kV, drum The rotational speed of the receiver is 110rpm / min, the diameter of the needle is 20G, and the distance between the needle and the receiver is 12cm. By controlling the spinning time, the loading of Pt was 0.08mgcm -2 The catalytic layer, the thickness of the catalytic layer is about 1.5 μm. The prepared catalytic layer is heat-treated at ...
Embodiment 3
[0049] Take by weighing each 0.1g of PtFe / C and PtPd / C catalyst, wherein the massfraction of Pt is respectively 25% and 55%, 0.5g10wt.%Nafion solution, add 0.15g water and 0.55g Virahol ultrasonic mixing, after Add 0.04 g of polyvinyl alcohol and glutaraldehyde polymer in total, the mass ratio of polyvinyl alcohol and glutaraldehyde is 1:1, and stir for 32 hours to obtain a catalyst slurry with a viscosity of 120 cp. Then the electrospinning technology was used to prepare the catalytic layer. The environmental parameters of the electrospinning were: temperature 15°C, relative humidity 20%RH; the control parameters were: the slurry feed rate was 1mL / h, the voltage was 13kV, the drum receiver The rotational speed of the machine is 80rpm / min, the diameter of the needle is 20G, and the distance between the needle and the receiver is 13cm. A Pt loading of 0.15 mg cm was obtained by controlling the spinning time -2 the catalytic layer. The temperature of the prepared catalytic lay...
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