Polyaniline-graphene composite film and its preparation method, cells and e-books
A technology of composite thin film and graphene, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of defective material structure, complicated preparation process, and inability to be used as electrode materials, etc., and achieve good quality and controllable thickness Effect
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[0037] The preparation method of the aniline-graphene monomer modified electrode described in the preparation method of the polyaniline-graphene composite film comprises: the aniline-graphene monomer modified electrode is prepared by preparing a Nafion suspension of graphene and aniline, The Nafion suspension of the graphene and aniline is evenly coated on the electrode substrate, and the obtained product is dried in vacuum.
[0038] Specifically, the above-mentioned Nafion suspension for preparing graphene and aniline includes: adding graphene and aniline into the Nafion solution at room temperature, and fully dispersing the suspension; - 0.09mL parts by volume, the Nafion solution is 0.1-5mL parts by volume and the concentration is 0.01-5wt%.
[0039] The above-mentioned fully dispersed suspension is specifically: using magnetic stirring or ultrasonic oscillation for dispersion, the magnetic stirring speed is 10-60r / min, and the stirring time is 10-50min; the ultrasonic osci...
Embodiment 1
[0054] Add 0.002g of graphene and 0.01mL of aniline to 0.1mL of Nafion solution with a concentration of 0.01wt%, ultrasonically oscillate for 5 minutes, and the power of ultrasonic oscillation is 800w. Control the dispersion temperature of ultrasonic oscillation at 20°C through cold water circulation to obtain uniformly dispersed graphene- Aniline suspension. Spin-coat 0.01mL of the suspension onto a 12mm2 electrode substrate (polythiophene film), and dry it in vacuum at 25°C for 30min with a vacuum degree of 2KPa to obtain an aniline-graphene modified electrode (AN-GNS). The schematic diagram is as follows: figure 1 As shown, 1 is a graphene sheet, 2 is aniline monomer, and 3 is an electrode substrate. The graphene sheet 1 has an irregular shape, and the aniline monomer 2 is uniformly dispersed on the surface of the electrode substrate 3 . It is electropolymerized by constant current method, and the electrolyte is 0.5mol L -1 HNO 3 solution, AN-GNS is the working electrode...
Embodiment 2
[0058] Add 0.005g of graphene and 0.05mL of aniline to 2.5mL of Nafion solution with a concentration of 1wt%, ultrasonically oscillate for 30min, and the power of ultrasonic oscillation is 800w, and control the dispersion temperature of ultrasonic oscillation at 20°C through cold water circulation to obtain uniformly dispersed graphene-aniline suspension. Spin-coat 0.01 mL of the suspension onto a 12 mm2 electrode substrate (polythiophene film), and dry it in vacuum at 25 °C for 30 min with a vacuum degree of 2 KPa to obtain an aniline-graphene modified electrode (AN-GNS). It is electropolymerized by constant current method, and the electrolyte is 0.5mol L -1 HNO 3 solution, AN-GNS is the working electrode, platinum is the auxiliary electrode, saturated calomel electrode is the reference electrode, and the current density is 5mA / cm 2 , the polymerization time is 70s, and the thickness of the obtained polyaniline-graphene composite film is about 0.05mm. The specific capacita...
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