| abstract |
The invention discloses a high-capacity lithium ion battery for drones and a preparation method. The method includes the following methods: step 1: uniformly coating the positive electrode slurry on the surface of the positive electrode current collector, drying, rolling and punching to obtain a positive electrode sheet; step 2: uniformly coating the negative electrode slurry on the surface of the negative electrode current collector, drying Drying, rolling, and punching to obtain a negative electrode sheet; Step 3: Wash the polyolefin diaphragm in acetone, transfer it to an acrylamide solution, and set a dose rate of 1.5-2 kGy/h under a nitrogen atmosphere, and the irradiation dose is 2～5kGy, 60 Co-γ ray irradiation and grafting; obtaining a separator; Step 4: stacking the positive electrode sheet, the separator, and the negative electrode sheet to form a battery cell, put it into a packaging case, inject an electrolyte solution, and seal it to obtain a high-capacity lithium ion battery. Beneficial effects: by preparing the negative electrode active material, the lithium storage capacity is significantly improved; the negative electrode sheet is obtained by combining the composite binder and the composite conductive agent; the energy density and cycle stability of the lithium ion battery are increased. |