Preparation method of phosphoric acid-activated hierarchical porous carbon microsphere modified electrode
A technology of phosphoric acid activation and hierarchical porous carbon, which is applied in chemical instruments and methods, hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve problems such as poor conductivity, low activity of internal charges in capacitors, and inconvenient use. Achieve the effects of enhanced capacitance performance and stability, low preparation cost, and simple process
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Embodiment 1
[0031] A method for preparing a phosphoric acid-activated hierarchically porous carbon microsphere modified electrode, comprising the following steps:
[0032] Step 1: Preparation of modified materials
[0033] Dissolve 6 g of D-(+)-xylose, 3 g of template agent F127 and 1 mL of sulfuric acid in 60 mL of ultrapure water, stir for 8 h, and transfer the resulting solution to a 100 mL polytetrafluoroethylene-lined stainless steel high-pressure In a kettle, hydrothermal treatment was carried out at 413 K for 24 h. After cooling to room temperature, the resulting brown mixture was filtered, and the precipitate was washed repeatedly with ultrapure water and ethanol, and dried in a 373 K oven. Then mix phosphoric acid (mass ratio is phosphoric acid (85%): precursor = 4:1), put it in an oven to dry at 373 K, and finally dry it with N 2 Calcined at 1073 K for 4 h at 278 K / min in a protected tube furnace to obtain phosphoric acid-activated hierarchically porous carbon microspheres (se...
Embodiment 2
[0038] A preparation method utilizing phosphoric acid to activate porous carbon microspheres, comprising the following steps:
[0039] Step 1: Preparation of modified materials
[0040] Dissolve 6 g of D-(+)-xylose and 1 mL of sulfuric acid in 60 mL of ultrapure water, and after stirring for 8 h, transfer the resulting solution into a 100 mL polytetrafluoroethylene-lined stainless steel autoclave, at 413 K The hydrothermal treatment was carried out for 24 h. After cooling to room temperature, the resulting brown mixture was filtered, and the precipitate was washed repeatedly with ultrapure water and ethanol, and dried in a 373 K oven. Then mix phosphoric acid (mass ratio is phosphoric acid (85%): precursor = 4:1), put it in an oven to dry at 373 K, and finally dry it in N 2 Calcined at 1073 K for 4 h at 278 K / min in a protected tube furnace to obtain phosphoric acid-activated porous carbon microspheres.
[0041] Step 2: Preparation of modified electrodes
[0042]Weigh 1 mg...
Embodiment 3
[0045] A preparation method utilizing porous carbon microspheres, comprising the following steps:
[0046] Step 1: Preparation of modified materials
[0047] Dissolve 6 g of D-(+)-xylose, 3 g of template agent F127 and 1 mL of sulfuric acid in 60 mL of ultrapure water, stir for 8 h, and transfer the resulting solution to a 100 mL polytetrafluoroethylene-lined stainless steel Hydrothermal treatment was carried out at 413 K for 24 h in an autoclave. After cooling to room temperature, the resulting brown mixture was filtered, and the precipitate was repeatedly washed with ultrapure water and ethanol, then dried in a 373 K oven, and finally heated under N 2 Calcined at 1073 K for 4 h at 278 K / min in a protected tube furnace to obtain porous carbon microspheres.
[0048] Step 2: Preparation of modified electrodes
[0049] Weigh 1 mg of porous carbon microspheres and disperse them in 1 mL of ultrapure water, and ultrasonicate for 10 minutes to form a uniformly dispersed and stabl...
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