China Nonferrous Metallurgy

Copper foil is an important part of lithium battery as the negative current collector that is the main factors of the cycle life and stability of battery. It determines the internal resistance of lithium battery. With the improvement of the requirements for the energy density and cycle life of lithium battery, the requirements for the relevant properties of electrolytic copper foil, such as the roughness and micro morphology of surface, are also improved accordingly. Because of its porous structure and large specific surface area, 3D porous copper foil can effectively improve the stability and cycle life of lithium-ion battery. Promoting the commercial application of 3D porous copper foil has become one of the main research directions of lithium-ion battery cathode materials at this stage. In this paper, several methods of preparation processes of porous copper foil and their relevant electrochemical performance are reviewed. Porous copper foil negative current collector has great significance to improve the performance of lithium-ion batteries. This paper provide the reference for engineers and researchers of copper foil.