A novel method that taking electrodeposited copper foil as a raw material undergoes asynchronous rolling and surface morphology modification at room temperature was proposed, and the rolled electrodeposited (RE) copper foil with excellent mechanical properties and modified surface morphology was obtained to be used as the anode current collector of high-performance lithium-ion batteries. The surface roughness of RE copper foil (Ra = 1.8 μm) is significantly higher than that of the traditional electrodeposited copper foil (Ra = 0.22 μm) when the thickness is 6 μm. The hilly surface morphology of RE copper foil helps to enhance the interfacial adhesion between current collector and active material, which contributes to the reduction of charge transfer resistance and improvement of specific capacity and rate performance. The mechanical properties of RE copper foil are significantly improved after asynchronous rolling. The excellent mechanical properties of RE copper foil current collector can maintain good electrical contact integrity of electrode active material during lithiation-de-lithiation and significantly improve the cycle life. The discharge capacity of RE electrode is maintained at 329.6 mAh g⁻¹ and exhibits 91.1% capacity retention for 200 cycles at 500 mAg⁻¹, which is much higher than the electrodes with electrodeposited and rolled copper foils as the current collector.

提出了一种以电沉积铜箔为原料在室温下进行异步轧制和表面形貌改性的新方法，并获得了具有优异机械性能和表面形貌的轧制电沉积（RE）铜箔作为阳极。高性能锂离子电池的集电器。当厚度为6μm时，RE铜箔的表面粗糙度（Ra = 1.8μm）明显高于传统的电沉积铜箔（Ra = 0.22μm）。RE铜箔的丘陵表面形态有助于增强集电器与活性材料之间的界面粘合力，从而有助于降低电荷转移阻力并提高比容量和倍率性能。异步轧制后，RE铜箔的机械性能得到显着改善。RE铜箔集电器的优异机械性能可以在锂化-去锂化过程中保持电极活性材料的良好电接触完整性，并显着提高循环寿命。RE电极的放电容量保持在329.6 mAh g^-1并在500 mAg ^-1下表现200循环91.1％的容量保持率，这比以电沉积和轧制铜箔作为集电器的电极高得多。