A method for preparing zinc-ion hybrid capacitors using acid-activated activated carbon electrode materials
A technology for hybrid capacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of low capacity of activated carbon, and achieve uniform distribution of components, improved performance, and adjustable morphology.
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Embodiment 1
[0026] (1) Preparation of activated activated carbon: Take 2 g of activated carbon AC, fully grind it with a mortar for 0.5 h, add 30 mL of 15 mol / L concentrated nitric acid and 10 mL of 15 mol / L concentrated sulfuric acid to a 100 mL beaker, and then grind the above The good AC was slowly added to the mixed concentrated acid solution, placed in an oil bath at 80 °C, heated and stirred at a constant temperature for 4 h. After the reaction was completed, the solution was washed with deionized centrifugation until the pH of the solution was 6, filtered, and finally dried in a vacuum oven to obtain AAC powder;
[0027] (2) Preparation of electrode sheet: Add 70 mg of AAC powder prepared in step (1), 20 mg of acetylene black, and 10 mg of PVDF into a mortar, fully grind it uniformly, and then add about 800 μL of N-methylpyrrolidone. , continue to grind until there are no obvious particles visible to the naked eye, that is, the electrode slurry is obtained. The electrode slurry is ...
Embodiment 2
[0032] (1) Preparation of activated activated carbon: Take 2 g of activated carbon AC, fully grind it with a mortar for 0.5 h, add 40 mL of concentrated nitric acid with a concentration of 16 mol / L to a 100 mL beaker, and then slowly add the above ground AC to the The concentrated acid solution was placed in an oil bath at 60 °C, heated and stirred at a constant temperature for 6 h. After the reaction, the solution was washed with deionized centrifugation until the pH of the solution was 6, filtered, and finally dried in a vacuum oven to obtain AAC powder;
[0033] (2) Preparation of electrode sheet: 90 mg of AAC powder prepared in step (1), 40 mg of carbon nanotubes, and 40 mg of PVDF were added to a mortar, fully ground, and then about 1000 μL of N-methylpyrrolidone was added. , continue grinding until there are no obvious particles visible to the naked eye, that is, the electrode slurry is obtained. The electrode slurry is evenly coated on the carbon paper with a scraper, dr...
Embodiment 3
[0036] (1) Preparation of activated activated carbon: Take 2 g of activated carbon AC, fully grind it with a mortar for 0.5 h, add 40 mL of concentrated hydrochloric acid with a concentration of 11 mol / L to a 100 mL beaker, and then slowly add the above ground AC into the The concentrated acid solution was placed in an oil bath at 80 °C, heated and stirred at a constant temperature for 0.5 h. After the reaction was completed, the solution was washed with deionized centrifugation until the pH of the solution was 7, filtered, and finally dried in a vacuum oven to obtain AAC powder;
[0037] (2) Preparation of electrode sheet: Add 60 mg of AAC powder prepared in step (1), 10 mg of carbon aerogel, and 10 mg of PVDF into a mortar, fully grind it evenly, and then add about 800 μL of N-methyl Pyrrolidone, continue to grind until there are no obvious particles visible to the naked eye, that is, electrode slurry is obtained. The electrode slurry is evenly coated on the stainless steel m...
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