A polypyrrole nanotube/graphene nanosheet composite material, its preparation and application
A technology of graphene nanosheets and polypyrrole nanotubes, which is applied in the manufacture of hybrid/electric double layer capacitors and electrodes of hybrid capacitors, can solve problems such as hindering the contact between the core and electrolyte ions and affecting the capacitance, and achieve easy large-scale The effect of simple and easy production and preparation methods
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[0032] The invention provides a kind of preparation method of polypyrrole / graphene composite material, it is characterized in that, comprises the steps:
[0033] (1) Mix and disperse polypyrrole nanotubes and graphene nanosheets in a solvent according to a mass ratio of 10:1 to 1:10, add a catalyst to cause an acylation reaction to obtain an acylation reaction product; the graphene nanosheets The sheet is a graphene nanosheet with a size of 5-30nm containing carboxyl groups;
[0034](2) Clean the acylation reaction product described in step (1), remove solvent, catalyst and unreacted graphene nanosheets, disperse in deionized water after drying, add reducing agent, to remove graphite in the reaction product Oxygen-containing groups remaining in the ene shell can improve the conductivity of the composite material and obtain the reduced product;
[0035] (3) washing the reduced product in step (2) with water and then drying to obtain a polypyrrole nanotube / graphene nanosheet co...
Embodiment
[0049] Step 1, preparing polypyrrole nanotubes. 1.5mmol ferric chloride (FeCl 3 ·6H 2 O) Add to 30ml of 5mM methyl orange aqueous solution, stir at room temperature 25°C for 30 minutes, add dropwise 105 μL of pyrrole monomer, stir at room temperature 25°C for 12 hours, use 500mL deionized water / ethanol mixture to wash the obtained black product , filtered, placed in a drying oven, and dried at 60° C. for 24 hours to obtain black polypyrrole nanotubes.
[0050] Step 2, preparing graphene nanosheets. Add 0.4g of carbon black powder (Vulcan XC-72R, particle size 30nm, Cabot Corporation) into 100mL of 6M concentrated nitric acid, heat at 130°C and reflux for 48 hours, centrifuge (3000rcf) to get the reddish-brown supernatant, ultrasonic for 1 hour, and again Centrifuge (5000rcf) to take the supernatant, and heat at 200°C for 12 hours to obtain brown graphene nanosheets.
[0051] Step 3, preparing polypyrrole nanotube / graphene nanosheet composite. 9mg polypyrrole nanotubes and...
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