Manufacturing method for laminated electrode, carbon film and manufacturing method for carbon film
An electrode and stacking technology, which is applied in the field of supercapacitor electrode preparation, can solve problems such as difficult to guarantee performance consistency, reduced capacity and cycle performance, and no competitive advantage in products, so as to achieve high active material loading and strengthen fibrosis effect, the effect of low internal resistance
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[0043] The flow chart of the preparation method of the laminated electrode used in the super capacitor of the present invention is as follows figure 2 As shown, it mainly includes the following steps:
[0044] Step 1: Prepare the carbon membrane according to the aforementioned preparation method of the carbon membrane;
[0045] Step 2: Coating the conductive slurry on the current collector by extrusion coating, and then drying to obtain the conductive current collector;
[0046] Step 3: Laminating the carbon film and the conductive current collector, heating, rolling, and drying to prepare a laminated electrode for a super capacitor.
[0047] In a specific embodiment of the present invention, the current collector may be aluminum foil or corroded aluminum foil.
Example Embodiment
[0049] Example one:
[0050] In the first step, 94 parts by mass of activated carbon, 4 parts by mass of conductive carbon black, and 2 parts by mass of PTFE (polytetrafluoroethylene) dispersion resin are stirred and mixed according to the ratio. In the second step, add 200 parts by mass of water to the mixed materials, and stir to make the materials fully mixed. Preferably, a high-shear dispersion device can be introduced, and an improved automatic mixing and dispersion process system can be designed to make the processed materials produce a strong dispersion and crushing effect, and ultimately achieve the purpose of rapid ultra-fine dispersion. The third step is to add the mixed wet powder material to the closed mixer. In the high temperature and high pressure internal mixer, after a short time (2-12min) of kneading, dispersion, and mixing, the plasticity of the material is enhanced , The wet powder material is subjected to strong shearing, squeezing and stirring, and uniforml...
Example Embodiment
[0053] Embodiment two:
[0054] The difference from the first embodiment is that the mixing ratio of this embodiment is 90 parts by mass of activated carbon, 5 parts by mass of conductive carbon black, and 5 parts by mass of PTFE (polytetrafluoroethylene) dispersed resin; and Add 100 parts by mass of water during wet mixing; add 18 parts by mass of naphtha to the dough before preforming. The carbon film obtained by the preparation method of this embodiment has good mechanical properties such as strength, toughness and flexural resistance. According to the test, there is no crease after 20 bending at 90°, the thickness is ≥280μm, and the bulk density is ≥0.6g / cm 3 , Specific capacity≥1.2F / cm 2 .
[0055] The SEM image of the surface of the laminated electrode prepared after the carbon film prepared in this embodiment and the aluminum foil coated with conductive intermediate layers on both sides are laminated Figure 4 As shown, it can be seen from the figure that the uniformity of...
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