Cobalt selenide nanometer material serving as electrode material of supercapacitor and preparation method of cobalt selenide nanometer material
A technology of supercapacitors and nanomaterials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of poor cycle stability of conductive polymers, sparse research and development of selenides, and high oxide resistivity. Dense distribution, high specific capacity, and the effect of increasing specific surface area
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Embodiment 1
[0036] 1) Precursor formation: use an analytical balance to weigh Co(NO 3 ) 2 •6H 2 O 、CO(NH 2 ) 2 , NH 4 F was dissolved in deionized water, stirred on a magnetic stirrer at room temperature to form a solution with uniform concentration; then transferred to a polytetrafluoroethylene-lined reaction kettle, and the prepared nickel foam substrate was immersed in the reaction kettle In the solution, and then placed in an oven at 120 ° C for 7 h, naturally cooled to room temperature. After the end, the substrate was taken out and washed and dried to obtain the precursor Co(OH)(CO 3 ) 0.5 The substrate of the nanowires.
[0037] 2) Selenization treatment: Weigh Se, NaBH 4 Dissolved in deionized water, configured as an aqueous solution of 1mol / L NaHSe and transferred to a hydrothermal reactor, with the precursor Co(OH)(CO 3 ) 0.5 The nanowire substrate continues to be used as the substrate, immersed in the NaHSe aqueous solution in the reactor, then placed in an oven and r...
Embodiment 2
[0039] 1) Precursor formation: use an analytical balance to weigh Co(NO 3 ) 2 •6H 2 O 、CO(NH 2 ) 2 , NH 4 F was dissolved in deionized water, stirred on a magnetic stirrer at room temperature to form a solution with uniform concentration; then transferred to a polytetrafluoroethylene-lined reaction kettle, and the prepared nickel foam substrate was immersed in the reaction kettle In the solution, and then placed in an oven at 110 ° C for 8 h, naturally cooled to room temperature. After the end, the substrate was taken out and washed and dried to obtain the precursor Co(OH)(CO 3 ) 0.5 The substrate of the nanowires.
[0040] 2) Selenization treatment: Weigh Se, NaBH 4 Dissolved in deionized water, configured into a 0.5mol / L NaHSe aqueous solution and transferred to a hydrothermal reactor, and obtained in step 1 with Co(OH)(CO 3 ) 0.5 The nanowire substrate continues to be used as the substrate, immersed in the NaHSe aqueous solution in the reactor, then placed in an o...
Embodiment 3
[0042] 1) Precursor formation: use an analytical balance to weigh Co(NO 3 ) 2 •6H 2 O 、CO(NH 2 ) 2 , NH 4 F was dissolved in deionized water, stirred on a magnetic stirrer at room temperature to form a solution with uniform concentration; then transferred to a polytetrafluoroethylene-lined reaction kettle, and the prepared nickel foam substrate was immersed in the reaction kettle In the solution, and then placed in an oven at 100 ° C for 10 h, naturally cooled to room temperature. After the end, the substrate was taken out and washed and dried to obtain the precursor Co(OH)(CO 3 ) 0.5 The substrate of the nanowires.
[0043] 2) Selenization treatment: Weigh Se, NaBH 4 Dissolved in deionized water, configured into a 2mol / L NaHSe aqueous solution and transferred to a hydrothermal reactor, and obtained in step 1 with Co(OH)(CO 3 ) 0.5 The nanowire substrate continues to be used as the substrate, immersed in the NaHSe aqueous solution in the reaction kettle, then placed ...
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