Abstract:The high specific capacity, high energy density and low potential of alkali metal (Li and Na) batteries make them one of the important candidates for future energy storage devices, but they inherently suffer from serious dendrite growth problems, which leads to low Coulombic efficiency, short cell life and even short-circuiting and heating of the cells to cause accidents. The collector, as the supporting substrate of the electrode material and the component connecting the internal and external electron pathways, occupies a large portion of the volume and mass in the battery, which affects the energy density of the battery. The common modification methods are surface modification of the collector and structural modification, both of which can well solve the dendrite growth problem. This review introduced the problems of copper collectors in metal cells and their causes, and discussed the modification methods for copper collectors in recent years, and concluded with a summary and an outlook on future research directions.