Conductive coated aluminum foil refers to the upper and lower surfaces of high purity rolled aluminum foil with a thickness of less than 50um, uniformly coating a layer of conductive materials and special adhesives, such as carbon nanotubes, graphene, conductive carbon black, and conductive graphite to constitute a conductive coating composite product. This product is focused on the positive current collector of lithium-ion batteries and the bipolar chip of supercapacitors (EDLC). Because this product is used inside the core of the lithium battery, many harsh requirements are put forward for this product. For example, it is necessary to support long-term electrochemical stability on a higher voltage platform, resist long-term immersion in the electrolyte, have excellent surface contact ability, provide excellent interface conductivity, and withstand stress damage generated during long-term battery cycling.
The application of conductive coated aluminum foil has made significant contributions can increase the peeling force of the positive pole piece of the lithium-ion battery, thereby increasing the cycle life of the battery, reducing the internal resistance, increasing the charging and discharging rate, improving the charging and discharging ability in a low-temperature environment, and improving the battery first pass yield and the combo success rate in the production process, which greatly reduce the overall cost of battery manufacturing. Besides, the application of conductive coated aluminum foil also contributes great help to the [Battery performance consistency], which is an important indicator in the production process of power batteries.
At present, the conductive coating aluminum foil provided by our company is the thinnest that can be advanced coating processing on the 10um hard high-purity aluminum foil, and the coating surface density can control within 0.02g/㎡-5g/㎡. In other words, we can uniformly coat the minimum 20mg of conductive material on the surface of 1 square meter of aluminum foil with a thickness of only 200nm. This technology of our company is currently at the world's leading level.
The equipment and control system independently designed and developed by our company can achieve processing efficiency far exceeding the industry average. The average coating speed of the industry is about 50m/min. However, The stable process of mass production is required to be controlled above 150m/min. The control accuracy of our product maintains at a high level during high-speed processing. The physical size error of the coating and aluminum foil does not exceed 0.3mm. The technical indicators in this area are world-leading.
The conductive coated aluminum foil provided by our company can not only complete continuous full-width coating in terms of coating pattern design but also customize production according to the special requirements of customers, which strongly supports the product design and technological progress of downstream battery companies. We can theoretically apply any pattern of aluminum foil coating, and the accuracy of the front and back alignment can reach ±0.3mm, leading the entire industry.
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