A kind of porous film for hydrogen chlorine fuel cell and its preparation and application
A technology for hydrogen chloride fuel cells and porous membranes, which is applied in the manufacture of fuel cells, components of fuel cells, and the manufacture of final products. The effect of high strength and proton conductivity
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Embodiment 1
[0030] Embodiment 1: 1g of high-purity polyethersulfone (PES, molecular weight M w =58000), 0.005g SiO 2 (particle size 20-30nm), 4.6g of analytically pure DMAC and 0.3g of propylene carbonate ester were mixed, magnetically stirred at 60°C for 5h, ultrasonically mixed for 1h, left at room temperature for 3h to defoam, and scraped to form a film at room temperature. A film (thickness 85 μm) was formed by phase transformation from liquid phase to solid phase in the water. After 2 hours, the film was soaked in absolute ethanol for 4 hours, boiled in 1M hydrochloric acid at 40°C for 3 hours, and put into dilute hydrochloric acid for use. . The resulting membrane has an asymmetric structure (see the attached electron microscope photos for the lower surface, upper surface and cross-section of the membrane) figure 1 ), the contact angle of water droplets on the surface of the obtained film is 76.3 °, the porosity is 70.86%, the water absorption rate is 178.4%, the average pore diam...
Embodiment 2
[0031] Embodiment 2: 0.9g PES (M w =58000), 0.1g SiO 2 (particle size 20-30nm), 4.2g DMF and 0.26g PVP were mixed, stirred at room temperature for 1h, ultrasonically mixed for 0.5h, vacuum defoamed at 60°C for 1h, scraped on a glass plate at room temperature, and phase-inverted into a film in 30°C water ( film thickness 70 μm), soak in n-hexane for 1 day, air-dry, and cook in 3M hydrochloric acid at 80°C for 1 hour. The resulting membrane has an asymmetric structure (see the attached electron microscope photos for the lower surface, upper surface and cross-section of the membrane) figure 2), the contact angle of water droplets on the surface of the obtained film is 65.8 °, the porosity is 71.1%, the water absorption rate is 201.6%, the average pore diameter is 12.3nm, and the minimum bubble point pressure is 0.1MPa. The film surface liquid boiled in acid is wiped clean , the ionic conductivity at room temperature was tested to be 0.106S cm -1 .
[0032] The method describ...
Embodiment 3
[0034] Embodiment 3: 0.85g PES (M w =58000), 0.15g SiO 2 (particle size 10-20nm), 4g DMAC and 0.25g glycerol were ultrasonically mixed for 3 hours, stirred at room temperature for 5 hours, degassed in a vacuum oven at 60°C, scraped the film on a glass plate at room temperature, and then put it in water at 50°C for phase inversion to form a film ( 115 μm), after 4 hours, soak the film in absolute ethanol for 12 hours, boil in 3M hydrochloric acid at 60°C for 3 hours, and put it into dilute hydrochloric acid for use. The resulting membrane has an asymmetric structure (see the attached electron microscope photos for the lower surface, upper surface and cross-section of the membrane) Figure 4 ), the contact angle of water droplets on the surface of the obtained membrane is 64.1 °, the porosity is 75.31%, the water absorption is 213.4%, the average pore diameter is 9.46nm, and the minimum bubble point pressure is 0.31MPa. The membrane surface liquid boiled in acid is wiped clean ...
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