The development trend of copper foil for lithium battery material is explained in detail

Copper foil is a key material for the anode of lithium-ion batteries, which has an important impact on battery energy density and other performance, accounting for about 5%-8% of the cost of lithium-ion batteries. In the context of the current battery industry to improve quality and reduce costs, ultra-thin and high-end is the keyword for its technical development and market demand.

As energy density continues to rise, power lithium-ion battery manufacturers are also placing higher demands on copper foil, with ultra-thin copper foil, high tensile strength copper foil, porous copper foil, coated copper foil, etc. coming to the market. Similar to porous aluminum foil, although it can increase the loading of the negative active material and allow the negative electrode to form a three-dimensional conductive network, it is still unavoidable to face huge difficulties to solve in mass production, and there are still certain technical difficulties in coating, laminating, shearing and winding.

Similar to coated aluminum foil, copper foil with coating can also significantly reduce contact internal resistance, improve bonding, accelerate electrolyte wetting, improve low-temperature performance, reduce burr in the process, collector protection, etc. However, as of now, the match with the negative electrode material is not very ideal, so it is not yet used in large quantities, and further research and optimization are required.

In the background of the new energy vehicle industry is strongly supported by the national policy, power lithium-ion batteries will drive China’s lithium copper foil market to maintain a high upward trend

From a technical point of view, thinner lithium copper foil means less resistance, so the performance of lithium-ion batteries such as energy density will also be improved. Moreover, the smaller the thickness of the lithium copper foil, the lighter the weight of the corresponding battery will be, which can effectively reduce the cost of raw materials for copper foil. Therefore, the trend is to use thinner and lighter lithium-ion copper foil in the future.

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