High theoretical charge capacity (3,860 mAh g⁻¹) and low redox potential (−3.04 V vs. standard hydrogen electrode) make lithium metal a promising anode for next‐generation high energy density battery. However, the practical implementation of Li‐metal anode is still elusive due to poor coulombic efficiency and cycling performance as well as safety concerns caused by lithium dendrite formation and poor compatibility of liquid electrolyte with lithium. In this work, we developed a strategy to control lithium deposition and growth by using surface modified electrodes coated by a conductive chelate compound tris‐(8‐hydroxyquinoline) aluminum (Alq₃) onto copper current collector. As a result, Alq₃ exhibits good conductivity and electrochemical stability verified by cyclic voltammetry test. The Alq₃ can modulate lithium metal growth on Cu surface, in addition, it demonstrates morphology control of deposited lithium by tuning variables such as current density and coating thickness. Optimal cycling stability and stable coulombic efficiency over 300 cycles are observed on the Li||Alq₃/Cu cell at 50 nm coating thickness – an evidence shows controlled lithium deposition by this simple but effective surface modified electrode.

中文翻译：

---

在Alq3涂层基底上的受控锂沉积**

较高的理论充电容量（3,860 mAh g ^-1）和较低的氧化还原电势（相对于标准氢电极为-3.04 V）使锂金属成为下一代高能量密度电池的有希望的负极。但是，由于库仑效率和循环性能差，以及锂枝晶形成和液体电解质与锂的相容性差，安全性问题，锂金属阳极的实际实施仍然难以实现。在这项工作中，我们制定了一种策略，通过使用表面修饰的电极来控制锂的沉积和生长，该表面修饰的电极由导电螯合物三（8-羟基喹啉）铝（Alq ₃）涂覆到铜集流体上。结果，Alq ₃通过循环伏安法测试证明具有良好的导电性和电化学稳定性。Alq ₃可以调节锂金属在Cu表面的生长，此外，它还可以通过调节变量（例如电流密度和涂层厚度）来证明沉积锂的形态控制。在Li || Alq ₃ / Cu电池上以50 nm的涂层厚度观察到最佳的循环稳定性和300次以上的稳定库仑效率-证据表明，通过这种简单但有效的表面改性电极可控制锂的沉积。