A method for manufacturing an electrode with a protective layer
A protective layer and electrode technology, applied in the field of manufacturing electrodes with protective layers, can solve the problems of complex method and high cost, and achieve the effects of simple method, low cost and strong operability
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[0052] The residence time has certain influence on the preparation of the protective layer. Preferably, in step b, the residence time is 5-60 seconds. Within this residence time, the performance of the resulting electrode with a protective layer is better. In some embodiments of the present invention, the dwell time can be 5 seconds, 7 seconds, 10 seconds, 12 seconds, 15 seconds, 18 seconds, 20 seconds, 22 seconds, 24 seconds, 25 seconds, 27 seconds, 29 seconds, 30 seconds, 32 seconds, 35 seconds, 37 seconds, 40 seconds, 42 seconds, 45 seconds, 48 seconds, 50 seconds, 52 seconds, 55 seconds, 58 seconds, 60 seconds, etc.
[0053] In order to improve the coating effect, the coating of the present invention may be performed only once, or may be repeated several times. That is, repeat the following steps at least once: after drying the taken-out electrode plate, vertically immerse it in the coating solution, and then vertically take it out from the coating solution at a speed o...
Embodiment 1
[0071] 150g of LiMn 2 o 4 , 3.2g of carbon black and 22.2g of carbon nanotubes, 6.3g of styrene-butadiene rubber and water were mechanically stirred and mixed at 1500rpm for 2 hours. The resulting mixture was then screen-filtered to obtain cathode slurry. The cathode was prepared by casting the slurry on titanium foil. After drying, the cathode plate was cut into 44.5mm×73.5mm for later use.
[0072] 10 mg of reduced graphene oxide was weighed and 50 mL of ethanol was added, and the resulting solution was stirred at room temperature for 30 minutes, followed by sonication for 30 minutes. Afterwards, an additional 350 mL of ethanol was added and the solution was stirred magnetically for 30 minutes at room temperature to obtain a homogeneous and well-proportioned solution. The cathode was then moved vertically downward towards the reduced graphene oxide solution at a constant speed of 8.4 mm / s, after all parts of the cathode were immersed in the solution, the cathode was held...
Embodiment 2
[0076] 150g of LiMn 2 o 4 , 3.2g of carbon black and 31.9g of carbon nanotubes, 6.7g of styrene-butadiene rubber and water were mechanically stirred and mixed at 1500rpm for 2 hours. The resulting mixture was then screen-filtered to obtain cathode slurry. The cathode was prepared by casting the slurry on titanium foil. After drying, the cathode plate was cut into 44.5mm×73.5mm for later use.
[0077] 30 mg of reduced graphene oxide was weighed and 50 mL of ethanol was added, and the resulting solution was stirred at room temperature for 30 min, followed by sonication for 30 min. Afterwards, another 350 mL of 1,2-dichloroethane was added, and the solution was continued to be magnetically stirred at room temperature for 30 minutes to obtain a homogeneous and well-proportioned solution. Then move the cathode vertically downward into 500mL water at a constant speed of 1.7mm / s, after immersing all parts of the cathode in water, then add 0.04mL reduced graphene oxide solution dr...
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