Cascade type super capacitor and method for fabricating the same
A supercapacitor, stacked technology, applied in the direction of capacitors, electrolytic capacitors, capacitor terminals, etc., can solve problems affecting the normal operation of supercapacitors, affecting the safety of supercapacitors, and uneven temperature of electrode stacks, etc., to achieve rate discharge performance improvement , reduce polarization, and improve safety performance
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Embodiment 1
[0040] The laminated supercapacitor of the present invention is manufactured through the following steps.
[0041] (1) After the homopolyvinylidene fluoride powder is completely dissolved in an appropriate amount of nitrogen-methylpyrrolidone, the active carbon, acetylene carbon black and homopolyvinylidene fluoride powder are activated carbon: acetylene carbon black: polyvinylidene fluoride powder = Mixing, stirring and dispersing at a weight ratio of 85:5:10 to obtain a uniform slurry;
[0042] (2) According to the requirements of the electrode size of the manufactured supercapacitor, use a casting machine to evenly coat it on the surface of the metal aluminum foil except for the reserved blank area. The coating size can be realized by controlling the casting machine, 130 ℃ vacuum drying for 5-60 minutes, according to the same method, the slurry is evenly coated on the other side of the metal aluminum foil, and 100 ℃ vacuum drying for 5-20 minutes, thus making a carbonaceous...
Embodiment 2
[0051] (1) Polyacrylate emulsion is used as adhesive, and powdery manganese dioxide is the supercapacitor active material, which is mixed into a uniform slurry according to the weight ratio of manganese dioxide: acetylene carbon black: polyacrylate = 90:5:5 , evenly coated on the nickel foam;
[0052] Step (2) to step (5) are the same as in Example 1.
[0053] When carrying out the high-current discharge performance test, it was found that the voltage drop of the supercapacitor manufactured in Example 2 was significantly reduced in the initial discharge stage, and its internal temperature distribution tended to be average, and the safety performance was improved.
Embodiment 3
[0055] Using polytetrafluoroethylene emulsion as the adhesive, polyaniline powder as the supercapacitor active material, according to the weight ratio of polyaniline: acetylene carbon black: polytetrafluoroethylene = 90:5:5 mixed into a uniform slurry, uniform coating on nickel foam. After vacuum drying at 100°C for 6 hours, the electrodes were rolled to a certain thickness and density on a cold press. According to the requirements of the size of the separator, the separator is cut, and then 2 single-sided negative electrode sheets 41, 10 double-sided negative electrode sheets 4, 10 separator films 1, and 11 double-sided positive electrode sheets 1 such as Figure 4 The method shown is stacked together to obtain an electrode laminate 20, and the positive electrode lead-out terminal 7 and the negative electrode lead-out terminal 8 are respectively drawn out by ultrasonic welding on both sides of the electrode laminate 20, and put into a square aluminum shell container, filled w...
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