Preparation method and application of nanofiber electrode for proton exchange membrane fuel cell
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 effects of improving stability, large porosity, and improving utilization.
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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 to co- 0.02g, the mass ratio of polyacrylic acid and polyvinyl alcohol was 1:1, stirred for 36h to obtain a catalyst slurry with a viscosity of 110 cp. 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 was 140°C, the treatment time was 60 min, and the treatment atmosphere was air, so that the polymer was esterified. Finally, transfer the heat-treated catalytic layer to Nafion ® 211 membrane, hot-pressing temperature 140°C, ho...
Embodiment 2
[0047] Weigh 0.11g of PtCo / C catalyst, wherein the mass fraction of Pt is 45%, 0.8 g of 5 wt.% Nafion solution, add 0.1 g of water and 0.35 g of isopropanol and ultrasonically mix evenly, then add cyclodextrin, polyacrylic acid polymer The total amount of polymer is 0.02g, the mass ratio of cyclodextrin and polyacrylic acid is 1:1, and the catalyst slurry with a viscosity of 90 cp can be obtained after stirring for 24 hours. Adopt electrospinning technology to prepare catalytic layer then, the environment parameter of electrospinning is: temperature 15 ℃, relative humidity 30%RH; Control parameter is: slurry feed rate is 0.8mL / h, and voltage is 12.5kV, turns The rotational speed of the drum receiver is 110 rpm / min, the diameter of the needle is 20G, and the distance between the needle and the receiver is: 12 cm. A Pt loading of 0.08 mgcm was obtained by controlling the spinning time -2 The catalytic layer, the thickness of the catalytic layer is about 1.5 μm. The prepared ca...
Embodiment 3
[0049] Weigh each 0.1g of PtFe / C and PtPd / C catalyst, wherein the mass fraction of Pt is respectively 25% and 55%, 0.5g10wt.%Nafion solution, add 0.15g water and 0.55g isopropanol 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 adopt electrospinning technology to prepare catalytic layer, the environmental parameter of electrospinning is: temperature 15 ℃, relative humidity 20%RH; The rotational speed of the instrument is 80 rpm / min, the diameter of the needle is 20 G, and the distance between the needle and the receiver is 13 cm. A Pt loading of 0.15 mg cm was obtained by controlling the spinning time -2 the catalytic layer. The prepared catalytic layer is heat-treated at a temperature of 100° C., a treatment time of 100 min, and a treatment atmosphere of argon, so that the acetal react...
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