Lithium battery positive current collector, coated with carbon aluminum foil, reduce internal resistance, improve rate performance and cycle performance
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For lithium-ion batteries, aluminum foil is usually used as positive collector, while copper foil is used as negative collector. Firstly, copper aluminum foil has good conductivity, soft texture and low price. Secondly, copper aluminum foil is relatively stable in the air. Thirdly, the positive and negative potential of lithium-ion batteries determines that aluminum foil is used for positive electrode and copper foil is used for negative electrode And the electrons generated by the electrochemical reaction are collected and led to the external circuit, so as to form a larger current output, so as to realize the process of chemical energy into electric energy. In order to ensure the stability of the collector in the battery, the purity of both is required to be more than 98%.
The advantages of carbon coated aluminum foil in the application of lithium battery are as follows: restraining the polarization of the battery, reducing the thermal effect, improving the rate performance and capacity; reducing the internal resistance of the battery, significantly reducing the dynamic increase of internal resistance in the cycle process; improving the consistency, increasing the cycle life of lithium battery; improving the adhesion between the active material and the collector, improving the processing performance of the cathode material, reducing the manufacturing cost of the electrode piece; ensuring the stability of lithium battery The protective collector is not corroded by the electrolyte, and the service life of the battery is prolonged.Product Details
Product index parameters No. Item Production Standard Unit Test Method 1 Alloy 1060 N/A N/A 2 Status H18 N/A N/A 3 Base material thickness 15±5% μm Cut the aluminum foil into 100cm²,Standard area sample, weigh and Calculate 4 Thickness of carbon coated aluminum foil 15±1 μm 5 Width Please contact AFT for the required width mm steel tap 6 Area density Surface density of coated aluminum foil 41.25±2.06 g/m2 Cut the aluminum foil into 100cm²,Standard area sample, weigh (denoted by W, Unit is g), the areal density is:：W*100 Single side density of carbon coating 0.3±0.1 g/m2 Surface density of carbon coating on both sides 0.6±0.2 g/m2 Surface density of aluminum foil 40.58±2.03g/㎡ g/m2 7 Tensile Strength ≥180 Mpa Microcomputer control Electronic Universal Testing Machine 8 Extension ≥2 % 9 NMP immersion Temperature 25 ± 5 ℃, humidity ≤ 70%
No peeling after soaking for 24h/ Visual 10 Electrolyte immersion Temperature 25 ± 5 ℃, humidity ≤ 70%
No peeling after soaking for 24h/ Visual 11 Coating alignment on both sides ≤1 mm steel tap 12 chips Inner diameter：76.2mm/3inch Inch ernier caliper Material：Aluminum / Visual 14 Appearance Quality The surface of aluminum foil should be flat and clean without obvious defects such as scratches, holes, corrosion and non-metal pressing. Aluminum foil coil should be wound, does not allow serious wrinkle, bulge, depression or bumps or other defects. 15 Packaging and Storage 1、The sealing device is in the wooden box, the wooden box cannot have the footprint and so on dirty
2、the outer packing without damage, the product has no deformation, clearly marked (manufacturer, model, batch number), 6 factory inspection report
3、When packing, the specification is required to be placed in a box, and the materials of different specifications shall not be mixed.16 Storage Conditions Sealed at Environment with Temperature of 5 ~ 45 ℃, Humidity ≤ 96% Anti-Rain, Anti-Moisture, anti-ibration 17 Shelf Life Storage conditions and shelf life: - 5 ℃ ≤ temperature ≤ 42 ℃, humidity ≤ 70% RH. The shelf life of the product is tentatively determined to be 6 months from the date of production when the required packaging conditions are in good condition. 
Delivery Time:In Stock
Please contact AFT for the required width
