Preparation method of hierarchical pore carbon foam used for supercapacitor electrode
A technology of supercapacitor and graded porous carbon, which is applied in the preparation/purification of carbon, can solve the problems of difficulty in meeting the requirements of supercapacitors, lack of macropores, etc., and achieve the effect of improving high-current charge-discharge performance and excellent electrochemical performance.
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[0022] Example 1
[0023] First take formaldehyde: resorcinol: silica nanoparticles: water = 1:1:0.1:0.5 parts by mass, and mix them evenly, as the water phase; liquid paraffin is the oil phase, Span 80 and Tween 80 As an emulsifier. Take the quantity in accordance with Span 80: Tween 80: oil phase: water phase = 2:3: 8: 15 parts by mass, add the water phase to the oil phase under stirring conditions, and add the emulsifier, the stirring speed is 400r / min. After stirring for 20 min, an oil-in-water emulsion was obtained. In the prepared oil-in-water emulsion, the catalyst NaOH is added to polymerize and solidify resorcinol and formaldehyde. After the entire emulsion is solidified, a solidified body filled with oil phase is obtained, and the solidified body obtained is dried at 40°C for 24 hours. In a tube furnace, under a nitrogen atmosphere, the dried solidified body is heated from room temperature to 700°C for carbonization at a heating rate of 0.5°C / min, and then naturally ...
Example Embodiment
[0024] Example 2
[0025] First, take formaldehyde: resorcinol: silica nanoparticles: water=1:1.2:0.2:1 parts by mass, and mix it evenly as the water phase; liquid paraffin is the oil phase, Span 80, Tween 80 As an emulsifier. Take the quantity according to Span 80: Tween 80: oil phase: water phase = 2:3: 10: 20 parts by mass, add the water phase to the oil phase under stirring conditions, and add the emulsifier, the stirring speed is 800r / min, after stirring for 40 min, an oil-in-water emulsion was obtained. In the prepared oil-in-water emulsion, catalyst HCl is added to polymerize and solidify resorcinol and formaldehyde. After the entire emulsion is solidified, a solidified body filled with oil phase is obtained, and the solidified body is dried at 60°C for 12h. In a tube furnace, under a nitrogen atmosphere, the dried solidified body is heated from room temperature to 800°C for carbonization at a heating rate of 2°C / min, and then naturally cooled to room temperature. The ...
Example Embodiment
[0026] Example 3
[0027] First, take formaldehyde: resorcinol: silica nanoparticles: water=1:1.4:0.3:2 parts by mass, and mix it evenly, as the water phase; liquid paraffin as the oil phase, Span 80, Tween 80 As an emulsifier. Take the quantity in accordance with Span 80: Tween 80: oil phase: water phase = 2:3:15:25 parts by mass. Under stirring conditions, add the water phase to the oil phase and add the emulsifier at a stirring speed of 1500r / min, after stirring for 60 min, an oil-in-water emulsion was obtained. Add the catalyst NaOH or HCl to the prepared oil-in-water emulsion to polymerize and solidify resorcinol and formaldehyde. After the entire emulsion is solidified, a solidified body filled with oil phase is obtained. The solidified body is dried at 80°C for 8h . In a tube furnace, under a nitrogen atmosphere, the dried solidified body is heated from room temperature to 900°C for carbonization at a temperature increase rate of 5°C / min, and then naturally cooled to r...
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