A kind of bismuth/carbon supercapacitor battery and preparation method thereof
A technology of supercapacitor battery and carbon electrode, which is applied in the field of electrochemical energy storage, can solve problems such as research and application that have not been reported, and achieve the effects of environmental friendliness, long cycle life and large capacitance
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Embodiment 1
[0049] (1) Weigh a certain mass of Bi(NO 3 ) 3 ·5H 2 O, dissolved in 10ml concentrated nitric acid solution, diluted with water, prepared into 0.5mol / L Bi(NO 3 ) 3 Solution, set aside.
[0050] (2) Put 2.22gPVP, 20mL 0.5mol / L Bi(NO 3 ) 3 The solution was added to a 100mL round-bottomed flask in sequence, and after mixing uniformly, stirred at room temperature for 30min.
[0051] (3) According to the molar ratio of sodium borohydride and bismuth ion of 3:1, weigh a certain mass of sodium borohydride and dissolve it in 20ml of deionized water to prepare a sodium borohydride solution. Stir the sodium borohydride solution at room temperature. Add dropwise to the solution in step (2). After the addition is complete, continue to stir for 5 minutes. Wash the resultant with distilled water and ethanol and filter for several times until the pH is neutral, and put it in a vacuum drying oven at 90°C. Dry for 12 hours to obtain bismuth material.
[0052] (4) Use JEOLJEM-3010 scanning electron m...
Embodiment 2
[0058] (1) Weigh 1.99 g of bismuth citrate and dissolve it in 20 ml of ethylene glycol solution.
[0059] (2) 0.5 g of tartaric acid and 2.0 g of sodium hydroxide were sequentially added to the solution in step (1), and after the mixture was uniformly mixed, the mixture was stirred at room temperature for 30 min.
[0060] (3) Press NaH 2 PO 2 The molar ratio to bismuth ion is 80:1, and a certain mass of NaH is weighed 2 PO 2 Dissolve in 40ml deionized water to make NaH 2 PO 2 The solution, at 90 ℃, while stirring the NaH 2 PO 2 The solution is added dropwise to the solution of step (2). After the addition is completed, continue to stir for 300 minutes until the solution turns from clear to black. The resultant is washed with distilled water and ethanol and filtered several times with suction until the pH is neutral. Put it in a vacuum drying oven and dry at 80°C for 18 hours to prepare a bismuth material.
[0061] (4) Use JEOLJEM-3010 scanning electron microscope to test the bismuth ...
Embodiment 3
[0063] (1) Weigh a certain mass Bi 2 (SO 4 ) 3 , Dissolved in 10mL concentrated sulfuric acid solution to prepare 0.5mol / L Bi 2 (SO4) 3 Solution, set aside.
[0064] (2) Add 0.05 g of sodium oleate to the solution of step (1), mix well, and stir for 30 min at room temperature.
[0065] (3) According to the molar ratio of hydrazine hydrate to bismuth ion of 80:1, measure 80wt% of hydrazine hydrate and dilute it into a solution with a certain concentration, and add the hydrazine hydrate solution dropwise to step (2) while stirring at 90°C In the solution, after the dripping is completed, continue to stir for 120 minutes until the solution turns from clear to black. Wash the resultant with distilled water and ethanol and filter for several times until the pH is neutral, and put it in a vacuum drying oven at 70°C Dry for 24 hours to obtain bismuth material.
[0066] (4) Preparation of bismuth electrode and carbon electrode: according to the mass percentage of bismuth or carbon material ...
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