Carbon-coated aluminum foil is made from a composite slurry based on conductive carbon and high-purity electronic aluminum foil using a transfer coating process. Utilizing functional coatings to treat the surface of battery conductive substrates is a groundbreaking technological innovation. Carbon-coated aluminum/copper foil involves uniformly and delicately coating well-dispersed nano-conductive graphite and carbon-coated particles onto aluminum/copper foil.
Carbon-coated aluminum foil for lithium-ion batteries provides excellent static conductivity, collects microcurrents from active materials, thereby significantly reducing the contact resistance between positive/negative electrode materials and current collectors, and improving the adhesion between them. This reduces the amount of binder used, resulting in a significant improvement in the overall performance of the battery.
I. The function of carbon-coated aluminum foil
The higher the price of lithium batteries for electric bicycles, the stronger their performance should be. Performance generally refers to the effect of carbon-coated aluminum foil on the capacitor, which can be roughly divided into six types.
1. Suppress battery polarization, reduce thermal effects, and improve rate performance;
2. Reduces battery internal resistance and significantly reduces the increase in dynamic internal resistance during cycling;
3. Improve consistency and increase battery cycle life;
4. Improve the adhesion between the active material and the current collector, and reduce the manufacturing cost of the electrode;
5. Protects the current collector from corrosion by the electrolyte;
6. Improve the high and low temperature performance of lithium iron phosphate batteries and enhance the processing performance of lithium iron phosphate and lithium titanate materials.
II. Application Scope of Carbon-Coated Aluminum Foil
The main applications of carbon-coated aluminum foil for lithium-ion batteries include: power lithium batteries with fine-particle active materials, lithium iron phosphate cathodes, ternary/manganese lithium oxide cathodes with fine-particles, and replacement of etched aluminum foil in supercapacitors and primary lithium batteries (lithium thionyl, lithium manganese, lithium iron, button, etc.).
Carbon-coated aluminum foil can significantly improve the overall performance of lithium batteries and capacitors, but it should not be used as the main factor to change a certain aspect of battery performance, such as battery energy density, high and low temperature performance, high voltage, etc.
