The role and application scope of carbon-coated aluminum foil for lithium-ion batteries

Carbon-coated aluminum foil is made of conductive carbon-based composite slurry and high-purity electronic aluminum foil by transfer coating process. Surface treatment of battery conductive substrates with functional coatings is a breakthrough technological innovation. Carbon-coated aluminum foil/copper foil is to uniformly and delicately coat the dispersed nano-conductive graphite and carbon-coated particles on the aluminum foil/copper foil. on copper foil.

Carbon-coated aluminum foil for lithium-ion batteries can provide excellent static conductivity and collect the microcurrent of active materials, which can greatly reduce the contact resistance between the positive/negative electrode material and the current collector, and can improve the adhesion between the two. , which can reduce the amount of binder used, thereby significantly improving the overall performance of the battery.

1. The role of carbon-coated aluminum foil

The higher the price of the electric bicycle lithium battery, the stronger the performance should be, and the performance generally refers to the performance effect of carbon-coated aluminum foil on the capacitor, which is roughly divided into six types.

1. Suppress battery polarization, reduce thermal effects, and improve rate performance;

2. Reduce the internal resistance of the battery, and significantly reduce the dynamic internal resistance increase in the cycle process;

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 pole piece;

5. Protect the current collector from being corroded by the electrolyte;

6. Improve the high and low temperature performance of lithium iron phosphate batteries, and improve the processing performance of lithium iron phosphate and lithium titanate materials.

2. Application scope of carbon-coated aluminum foil

The main application areas of carbon-coated aluminum foil for lithium ion batteries are: power lithium batteries with fine particle active materials, lithium ferrous phosphate as the positive electrode, ternary/lithium manganate with fine particles as the positive electrode, and for supercapacitors, lithium primary batteries Batteries (lithium sub, lithium manganese, lithium iron, button type, etc.) replace etched aluminum foil, etc.

Carbon-coated aluminum foil has a considerable improvement in the comprehensive performance of lithium batteries and capacitors, but it cannot be used as the main factor to change the performance of certain aspects of the battery, such as battery energy density, high and low temperature performance, high voltage and so on.

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