| abstract |
The invention discloses a preparation method of FeCoCuZn co-doped Ni-based alloy-carbon nanotube composite material modified diaphragm. The solvent is added dropwise to make a slurry, which is coated on the diaphragm base film by a film coating machine; microwave heating treatment is performed under the protection of inert gas, the heating time is 5-30 minutes, and the heating temperature of the diaphragm coated with the slurry is 50- 80 ℃, after heating, the temperature was cooled to room temperature at a cooling rate of about 20 ℃/min to obtain a modified diaphragm with FeCoCuZn co-doped Ni-based alloy-carbon nanotube composite coating, the FeCoCuZn co-doped Ni-based diaphragm of the diaphragm The thickness of the base alloy-carbon nanotube composite coating is 2-15 μm. The modified separator is applied to the battery, which can improve the conductivity of the positive electrode, alleviate the battery swelling, suppress the side reaction between the positive electrode and the electrolyte, and improve the mechanical properties of the separator. Mildness and puncture strength, effectively improve the safety and self-discharge performance of the battery. |