Abstract:The increasingly severe energy crisis has become one of the major challenges that modern society urgently needs to address, prompting the scientific and industrial communities to actively explore new energy technologies. Lithium batteries, as an important member of the new energy field, have attracted much attention. Lithium copper foil, as the negative electrode current collector of lithium batteries, not only plays a key role in carrying active materials and transmitting current, but also plays an important role in improving the capacity, efficiency, and prolonging the life of lithium batteries. With the continuous evolution of miniaturization, lightweighting, and high energy density of lithium batteries, especially the transition from liquid batteries to solid-state batteries, more stringent requirements have been put forward for current collector materials represented by copper foil. "Thinning and thinning" has become the main trend in the development of lithium-ion copper foil, with high tensile strength and high elongation becoming key indicators of copper foil performance. Given this background, this article classified the electrochemical performance of additives in electrolytic copper foil plating solution, and conducted research and analysis on the additive monomers currently applied to ultra-thin copper foil, innovatively proposing an additive formula for ultra-thin copper foil. In addition, this article briefly and deeply explored the control of additives in the production process of ultra-thin copper foil, providing useful reference for research and production practice related to ultra-thin copper foil.