A kind of porous graphene electrode for supercapacitor and preparation method thereof
A technology of porous graphene and supercapacitors, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc. It can solve the problems of poor dispersion effect, discounted effect of supercapacitors, easy agglomeration of graphene, etc., achieving short time and low cost Low, the effect of improving the electrode structure
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[0043] A kind of preparation method of porous graphene electrode for supercapacitor of the present invention comprises the following steps:
[0044] S1, disperse the graphene oxide in water, and magnetically stir to make a graphene oxide aqueous dispersion;
[0045] The speed of magnetic stirring is 100-300 rpm / min.
[0046] S2, adding porous graphene to the graphene oxide aqueous dispersion prepared in step S1, and obtaining dispersion A through magnetic stirring and ultrasonic dispersion;
[0047] S3, adding carbon nanotubes to the dispersion A prepared in step S2, and adding a binder a, homogenizing, magnetic stirring, and ultrasonic dispersion to make a stable dispersion B;
[0048] The mass percent of porous graphene, graphene oxide and carbon nanotubes in the modifier is 70%: (1%~29%): (29%~1%), and porous graphene is a high-energy microwave rapid self-made high-energy compound in the laboratory. Conductive porous graphene, in the process of preparing porous graphene b...
Embodiment 1
[0067] S1, disperse graphene oxide in water, control the speed of magnetic stirring to 300rpm / min, and make graphene oxide aqueous dispersion;
[0068] S2, the time for controlling the microwave action is 40s, and the power control of the microwave action per gram of raw material is 400W; the used oxidative atmosphere of the microwave action is air; the atmosphere of the purified porous graphene is argon, and the porous graphene is prepared using the microwave method, which will be prepared The porous graphene was added to the graphene oxide aqueous dispersion prepared in step S1, and the speed of magnetic stirring was controlled to 300rpm / min for magnetic stirring, and then ultrasonically dispersed at 1200W for 1.5 hours to prepare dispersion A;
[0069] S3. Add carbon nanotubes to the dispersion A prepared in step S2, wherein the mass ratio of porous graphene, graphene oxide and carbon nanotubes is 7:1:2. Add binding agent a then, binding agent a is sodium carboxymethylcellu...
Embodiment 2
[0075] S1, disperse graphene oxide in water, control the speed of magnetic stirring to 300rpm / min, and make graphene oxide aqueous dispersion;
[0076] S2, the time for controlling the microwave action is 10s, and the power control of the microwave action per gram of raw material is 200W; the used oxidizing atmosphere of the microwave action is air; the atmosphere of the purified porous graphene is argon, and the porous graphene is prepared using the microwave method, and the prepared The porous graphene was added to the graphene oxide aqueous dispersion prepared in step S1, and the speed of magnetic stirring was controlled to 300rpm / min for magnetic stirring, and then ultrasonically dispersed at 1200W for 1.5 hours to prepare dispersion A;
[0077] S3. Add carbon nanotubes to the dispersion A prepared in step S2, wherein the mass ratio of porous graphene, graphene oxide and carbon nanotubes is 7:1:2. Add binding agent a then, binding agent a is sodium carboxymethylcellulose (...
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