Unstable Zn metal anodes with dendrites/side reactions are becoming the main obstacle to the practical application of zinc‐based aqueous batteries. Epitaxial growth has been considered to be an effective strategy for solving these issues, especially for inducing the (002) plane growth. Nonetheless, the (002)‐textured Zn is difficult to achieve highly stable Zn anode under high capacity resulting from its large lattice distortion. Herein, the Cu single atom anchored polymeric carbon nitride (Cu@PCN) is synthesized by a facile thermal polymerization method. Serving as multifunctional protective layer on Zn surface, the Cu@PCN can provide massive nucleation sites at a nano‐level and uniformize the electron distribution through coordination engineering. Optimizing the coordination structures of single Cu and N atoms within the carbon matrix enables a redistribution for electric field and regulates ion flux. More importantly, this coordination strategy with single atoms is first reported to customize oriented and continuous phase epitaxy along highly dendrite‐resistant Zn(101) plane by reducing (101) surface energy. This pattern of oriented dense deposition leads to stable and reversible Zn plating/stripping is achieved, which delivers an extended cycling life of 550 h at 10 A cm−2, 20 mAh cm−2. The practical full cell also displays stable performance for 1200 cycles.

中文翻译：

---

通过高度抗树晶的平面实现定向和连续相外延，适用于超高面容量锌金属电池


具有枝晶/副反应的不稳定 Zn 金属负极正在成为锌基水系电池实际应用的主要障碍。外延生长被认为是解决这些问题的有效策略，特别是对于诱导 （002） 平面生长。尽管如此，由于（002）织构的Zn具有较大的晶格畸变，因此在高容量下难以实现高度稳定的Zn阳极。在本文中，Cu 单原子锚定聚合物氮化碳 （Cu@PCN） 是通过简单的热聚合方法合成的。作为 Zn 表面的多功能保护层，Cu@PCN 可以在纳米水平上提供大量成核位点，并通过配位工程均匀电子分布。优化碳基体中单个 Cu 和 N 原子的配位结构可实现电场的重新分布并调节离子通量。更重要的是，这种具有单个原子的配位策略首次被报道为通过降低 （101） 表面能来定制沿高度树晶抗性 Zn（101） 平面的定向和连续相外延。这种定向致密沉积模式导致实现稳定和可逆的锌电镀/剥离，从而在 10 A cm-2、20 mAh cm-2 下提供 550 小时的延长循环寿命。实用的全电池在 1200 次循环中也显示出稳定的性能。