Because of the high theoretical special capacity, low cost, and low redox potential of sodium (Na) metal, it has been regarded as an ultimate anode for high-energy–density Na metal batteries. Nevertheless, Na metal suffers from dendrite formation due to a non-uniform Na deposition and unstable interface between Na and electrolyte, resulting in a short circuit and low Coulombic efficiency. Herein, a Zn coating on the Na metal surface as a nucleation and protective layer was fabricated through an in-situ chemical method involving a simple dripping ZnCl₂-tetrahydrofuran solution. The Zn coating endows Na with corrosion-resistance in organic ether-based electrolytes and a polysulfide solution. More importantly, Zn coating on Na enables a low nucleation overpotential due to its sodiophilic property, giving rise to a uniform Na deposition. Consequently, Zn-coated Na showed a stable cycling over 1200 h at 1 mA cm⁻² with a high capacity of 2 mA h cm⁻² in symmetric cells. When combined with Na₃V₂(PO₄)₃ cathode, full cells with Zn-coated Na demonstrated a good cycling stability and rate capability. This work presents a simple, effective and promising approach of designing a dendrite-free and corrosion-resistant Na metal anode for enhanced Na metal batteries.

由于钠（Na）金属的高理论特殊容量、低成本和低氧化还原电位，被认为是高能量密度钠金属电池的终极负极。然而，由于Na沉积不均匀以及Na与电解质之间的界面不稳定，Na金属会形成枝晶，导致短路和库仑效率低。在此，通过原位化学方法在钠金属表面上制备了一层锌涂层作为成核和保护层，该方法涉及简单的滴加 ZnCl ₂-四氢呋喃溶液。锌涂层赋予钠在有机醚基电解质和多硫化物溶液中的耐腐蚀性。更重要的是，由于其亲钠特性，Na 上的 Zn 涂层能够降低成核过电位，从而产生均匀的 Na 沉积。因此，Zn 包覆的 Na 在 1 mA cm ^-2下表现出超过 1200 小时的稳定循环，在对称电池中具有 2 mA h cm ^-2的高容量。当与 Na ₃ V ₂ (PO ₄ ) _3结合时正极，具有Zn包覆Na的全电池表现出良好的循环稳定性和倍率性能。这项工作提出了一种简单、有效且有前景的方法，可以为增强型钠金属电池设计无枝晶且耐腐蚀的钠金属负极。