Preparation method of aqueous supercapacitor
A supercapacitor, water-based technology, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of low working voltage of water-based supercapacitors, and achieve the effect of low price and high safety
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Embodiment 1
[0029] Step 1. Preparation of ACC@RGO material negative electrode:
[0030] 1. Pre-clean the carbon cloth with ethanol and distilled water under ultrasonic conditions for 30 minutes, and then dry it in vacuum at 60°C for 5 hours. Add graphite flakes, carbon cloth and sodium nitrate into the beaker at a mass ratio of 1:40:41, add 50ml of 98% concentrated sulfuric acid dropwise and stir at -5°C for 20min.
[0031] 2. Make KMnO 5 times the mass of carbon cloth4 Slowly add the above mixed solution and stir vigorously in an ice bath for 1h, then transfer to an oil bath and stir at 20°C for 1h, then slowly mix the solution with 100ml distilled water and stir in an ice bath for 1h, then place the mixed solution in an 80°C oil bath Stir in medium for 20min. H 2 o 2 Add to the mixture solution until the solution becomes clear.
[0032] 3. Add 2ml of hydrazine hydrate with a concentration of 96.3mmol, and heat the solution in an oil bath at 100°C under the condensation of a water-co...
Embodiment 2
[0042] Step 1. Preparation of ACC@RGO material negative electrode:
[0043] 1. Pre-clean the carbon cloth with ethanol and distilled water under ultrasonic conditions for 10 minutes, and then dry it in vacuum at 90°C for 8 hours. Add graphite flakes, carbon cloth and sodium nitrate into the beaker at a mass ratio of 1:40:41, add 80ml of 98% concentrated sulfuric acid dropwise and stir at -8°C for 60min.
[0044] 2. Make KMnO 8 times the mass of carbon cloth 4 Slowly add the above mixed solution and stir vigorously in an ice bath for 3 hours, then transfer to an oil bath and stir at 50°C for 3 hours, then slowly mix the solution with 150ml distilled water and stir in an ice bath for 3 hours, then place the mixed solution in an oil bath at 98°C Stir in medium for 60min. H 2 o 2 Add to the mixture solution until the solution becomes clear.
[0045] 3. Add 5ml of hydrazine hydrate with a concentration of 96.3mmol, and heat the solution in an oil bath at 130°C for 30h under th...
Embodiment 3
[0054] Step 1. Preparation of ACC@RGO material negative electrode:
[0055] 1. Pre-clean the carbon cloth with ethanol and distilled water under ultrasonic conditions for 20 minutes, and then dry it in vacuum at 80°C for 6 hours. Add graphite flakes, carbon cloth and sodium nitrate into the beaker according to the mass ratio of 1:40:41, add 60ml of 98% concentrated sulfuric acid dropwise and stir at -6°C for 40min.
[0056] 2. The mass is 6 times of carbon cloth mass KMnO 4 Slowly add the above mixed solution and stir vigorously in an ice bath for 2h, then transfer to an oil bath and stir at 40°C for 2h, then slowly mix the solution with 120ml distilled water and stir in an ice bath for 2h, then place the mixed solution in an oil bath at 90°C Stir in medium for 30min. H 2 o 2 Add to the mixture solution until the solution becomes clear.
[0057] 3. Add 3ml of hydrazine hydrate with a concentration of 96.3mmol, and heat the solution in an oil bath at 120°C for 24h under th...
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