Stacked super condensor and its manufacturing method
A technology for supercapacitors and manufacturing methods, which is applied in the direction of capacitor manufacturing, capacitors, electrolytic capacitors, etc., and can solve the problems of low power density and energy density of supercapacitors, unsuitability for manufacturing large surface area electrodes, and uncontrollable film thickness of formed electrodes, etc., to achieve Facilitate large-scale industrial production, good electrochemical performance, and convenient electrode forming control
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Embodiment 1
[0048] Example 1: Mix activated carbon with an average particle size of 10 microns, conductive carbon black, and polyvinylidene fluoride in a weight ratio of 80:15:5, then add an appropriate amount of nitrogen-methylpyrrolidone as a solvent, and stir for a certain period of time to obtain Uniform slurry with a certain viscosity, use a casting machine to evenly coat the mixed slurry on the nickel foam current collector, then stay in the drying oven at 85°C for 60 minutes, take it out and put it on the automatic temperature-controlled rolling mill Roll from low temperature to high temperature first, the lowest temperature is generally not less than 50°C, the setting of the highest temperature is 5°C higher than the melting point of the binder polymer, and the rolling gap is adjustable from 50 to 2000 microns . In order to prevent the electrode active material from adhering to the rollers of the rolling mill and enhance the adhesion of the carbonaceous active material to the curr...
Embodiment 2
[0051] Embodiment 2: Manufacture carbonaceous active material electrode and supercapacitor monomer with the method identical with embodiment 1. The difference is that the positive and negative electrode current collectors 1 and 6 used in the manufactured supercapacitor monomer are both nickel foils, the cut electrode area is 100 square centimeters, the thickness is 240 microns, and sodium sulfate with a concentration of 2 mol / liter is used The aqueous solution is used as the electrolyte, its rated working voltage is 1.1 volts, its Faraday capacity is 92 Faradays, its specific power density is 340 W / kg, its specific energy density is 2.3 Wh / kg, its discharge capacity remains above 97% after 10,000 charge and discharge cycles, and its electrode expansion rate is 7.2%.
Embodiment 3
[0052] Embodiment 3: Manufacture carbonaceous active material electrode and supercapacitor monomer with the method same as embodiment 1. The difference is that the positive electrode current collector 1 of the manufactured supercapacitor monomer is an aluminum mesh, the negative electrode current collector 6 is a copper mesh, the electrode area is 180 square centimeters, the thickness is 220 microns, and the concentration is 1 mol / The propylene carbonate solution of tetraethyl tetrafluoroborate ammonium salt in one liter is used as the electrolyte, its rated operating voltage is 2.7 volts, its Faraday capacity is 89 Faradays, its specific power density is 320W / kg, and its specific energy density is 3.6Wh / kg. The discharge capacity after 5,000 cycles remains above 98%, and the electrode expansion rate is 7.8%.
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