Method of preparing self-supporting flexible electrode through solvent-nonsolvent method and self-supporting flexible electrode
A technology of flexible electrodes and non-solvent method, which is applied in the direction of electrode manufacturing, battery electrodes, batteries, etc., can solve the problems of high cost, unsuitable for large-scale production of self-supporting flexible electrodes, and low efficiency, so as to achieve cheap manufacturing equipment and benefit The effect of lithium ion conduction and simple preparation method
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Embodiment 1
[0054] Take 1.5g of lithium cobaltate, 0.3g of PU, and 0.2g of carbon nanotubes in a ball mill jar, add 7.5mL of DMF to it, and pass through the ball mill at a speed of 300 rpm for 2 hours for ball mill dispersion treatment;
[0055]After the treatment, transfer the slurry to the PTFE mold with a dropper or a medicine spoon, apply the slurry evenly with a 500um scraper, let it stand for 1-3 minutes, and place the coated PTFE mold In the water tank, it is required that the water surface is higher than the polytetrafluoroethylene mold, and it is allowed to stand for 6 hours;
[0056] After standing still, place the polytetrafluoroethylene mold in a blast drying oven and dry at 80°C for 2 hours. After drying, cut the edge of the self-supporting flexible electrode with a knife, and wind the tear film to obtain a self-supporting porous self-supporting flexible electrode membrane.
[0057] see figure 2 , the Scanning Electron Microscope (SEM) photos under the scheme, from figur...
Embodiment 2
[0059] Take 1.8g of graphite, 0.05g of PEDOT, 0.05g of PSS, 0.05g of graphene, and 0.05g of carbon black in a ball mill jar, add 5mL of DMSO to it, and stir it by magnetic force at 800 rpm for 6 hours to disperse deal with;
[0060] After treatment, use a dropper or a medicine spoon to transfer the slurry on the glass, use a 200um scraper to evenly coat the slurry, let it stand for 1-3 minutes, put the coated glass in the water tank, and the water level should be higher than Glass pieces are enough, let stand for 4 hours;
[0061] After standing still, place the glass sheet in a blast drying oven and dry at 50°C for 18 hours. After drying, cut the edge of the self-supporting flexible electrode with a knife, and wind and tear the film to obtain a self-supporting porous self-supporting flexible electrode membrane.
[0062] see image 3 , the Scanning Electron Microscope (SEM) photos under the scheme, from image 3 It is clearly observed that the self-supporting flexible elect...
Embodiment 3
[0064] Take 1.6g of lithium iron phosphate, 0.1g of PU, 0.1g of carbon nanotubes, and 0.1g of carbon fiber in a ball mill tank, add 5mL of acetone to it, and pass through the ball mill at a speed of 250 rpm for 6 hours for ball mill dispersion treatment;
[0065] After the treatment, use a dropper or a medicine spoon to transfer the slurry on the PET sheet, use a 250um scraper to evenly coat the slurry, let it stand for 1-3 minutes, put the coated PET sheet in the water tank, It is required that the water surface is higher than the PET sheet, and stand for 2 hours;
[0066] After standing still, put the PET sheet in a blast drying oven and dry at 40°C for 24 hours. After drying, cut the edge of the self-supporting flexible electrode with a knife, and wind the tear film to obtain a self-supporting porous self-supporting flexible electrode membrane.
[0067] see Figure 4 , the Scanning Electron Microscope (SEM) photos under the scheme, from Figure 4 It can be clearly observe...
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