A kind of preparation method of supercapacitor electrode material
A technology for supercapacitors and electrode materials, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology for materials and surface science, etc., can solve the problem of expressing high specific capacitance and electrochemical active sites Low dot utilization, poor conductivity of NiO, etc., to achieve the effect of reducing agglomeration, improving conductivity, and increasing specific capacitance
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[0023] figure 1 It is a flow chart of a preparation method of a supercapacitor electrode material. like figure 1 Shown, a kind of preparation method of supercapacitor electrode material comprises steps:
[0024] Step S101, nickel sulfate NiSO 4 ·6H 2 O was dissolved in deionized water to obtain the first solution; GO aqueous solution was added to the first solution under continuous stirring to obtain the second solution.
[0025] Specifically, the second solution is continuously stirred at room temperature for 5-120 min.
[0026] Step S102, adding an aqueous ammonia solution to the second solution under continuous stirring to obtain a third solution.
[0027] Specifically, the third solution was continuously stirred at room temperature for 0.5-24 h.
[0028] In step S103, the third solution is sequentially centrifuged, washed, and dried to obtain the precursor Ni(OH) 2 / GO.
[0029] Specifically, the rotating speed of centrifugation is 3000-8000r / min; the washing is re...
Embodiment 1
[0039] Take 15mmol nickel sulfate NiSO 4 ·6H2 O was dissolved in 30 mL of deionized water to prepare the first solution of 0.5 mol / L, that is, nickel sulfate aqueous solution, and 20 mL of 1 mg / mL GO aqueous solution was added under the stirring condition of rotating speed of 1000 r / min, and the stirring was continued for 30 min.
[0040] Under the condition of stirring at a rotating speed of 1000r / min, 5 mL of 26% ammonia solution was added dropwise to the above mixed solution, and the dropwise addition was completed in 3 minutes, and the stirring was continued for 60 minutes.
[0041] After the reaction, it was centrifuged, washed three times with deionized water and ethanol, and dried to obtain gray-green Ni(OH) 2 / GO.
[0042] Take 400mg Ni(OH) 2 / GO and 400mg glucose were mixed evenly in 2mL deionized water and placed in a tube furnace, heated at 150°C for 6h in a nitrogen atmosphere, then calcined at 300°C for 3h at a heating rate of 1°C / min, and cooled to obtain carbo...
Embodiment 2
[0048] Take 20mmol nickel sulfate NiSO 4 ·6H 2 O was dissolved in 40 mL of deionized water to prepare a 0.5 mol / L nickel sulfate aqueous solution, and 20 mL of a 1 mg / mL GO aqueous solution was added under the stirring condition of a rotation speed of 1000 r / min, and the stirring was continued for 30 min.
[0049] Under the condition of rotating speed of 1000r / min, 10mL of 26% ammonia solution was added dropwise to the above solution, and the dropwise addition was completed in 5 minutes, and the stirring was continued for 120 minutes.
[0050] After the reaction, it was centrifuged, washed three times with deionized water and ethanol, and dried to obtain gray-green Ni(OH) 2 / GO.
[0051] Take 400mg Ni(OH) 2 / GO and 200mg glucose were mixed evenly in 2mL deionized water and placed in a tube furnace, heated at 150°C for 6h in a nitrogen atmosphere, then calcined at 300°C for 6h at a heating rate of 0.5°C / min, and cooled to obtain carbon-coated NiO / The graphene NiO / rGO@C ele...
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