Performance advantages and development prospects of lithium aluminum foil
Aluminum foil is a hot stamping material which is directly calendered into a thin sheet of metal aluminum. Its hot stamping effect is similar to that of pure silver foil stamping, so it is also called fake silver foil.
Due to its excellent properties, aluminum foil is widely used in food, beverages, cigarettes, pharmaceuticals, photographic bases, household daily necessities, etc., and is usually used as its packaging material; electrolytic capacitor materials; thermal insulation materials for buildings, vehicles, ships, houses, etc.; As a decorative gold and silver wire, wallpaper and various types of stationery printed matter and light industrial products, decorative trademarks.
Aluminum foil is the key material in the positive electrode of lithium battery. According to CNKI data of China Knowledge Network, the amount of aluminum foil of 1GWh lithium battery is about 600-800 tons.
Advantages of carbon coated aluminum foil in lithium battery applications: inhibit battery polarization, reduce thermal effects, improve rate performance; reduce battery internal resistance, and significantly reduce the dynamic internal resistance increase of the cycle; improve consistency and increase battery cycle life; Improve the adhesion of the active material and the current collector, reduce the manufacturing cost of the pole piece; protect the current collector from corrosion by the electrolyte; improve the processing performance of lithium iron phosphate and lithium titanate materials.