Aqueous zinc-ion batteries (ZIBs) have the merits of high specific capacity, intrinsic safety, pro-environment, high abundance and facile battery assembly process. However, the metallic zinc anodes are troubled by uncontrolled growth of dendrite and unfavorable side reactions, resulting in inferior cycling durability and hindering its practical application. Herein, an effective strategy for regulating uniform electrochemical plating/stripping of zinc metal and alleviating side reactions via introducing a thin graphene coating on the metallic zinc substrate is provided. As expected, the achieved Zn@graphene electrode exhibited outstanding cyclic durability for over 4000 h with an extremely low voltage hysteresis (28 mV at 0.2 mA cm⁻²) and could withstand repeated plating/stripping process without significant voltage fluctuations for 480 cycles at ultra-high current density (10.0 mA cm⁻²). Furthermore, when switching between cycling and resting modes, the Zn@graphene electrode manifested highly reversible zinc behavior of 1500 cycles with remarkably stable voltage response, revealing the excellent anti-corrosion property and high reversibility. Comprehensive studies show that graphene coating could not terminate the dendrite formation and side reactions, but would guide uniform Zn-ion/electrolyte flux and homogenize electric field distribution to regulate the evenly electrochemical plating/stripping of zinc metal, and also serve as a protective barrier to reduce the risk of being pierced by the growing dendrite and randomly distributed by-products, thereby enhancing the electrochemical properties and improving the safety of aqueous ZIBs.

水系锌离子电池（ZIBs）具有比容量高、本质安全、环保、丰度高和电池组装过程简单等优点。然而，金属锌负极存在不受控制的枝晶生长和不利的副反应等问题，导致循环耐久性差，阻碍了其实际应用。在此，提供了一种通过在金属锌基板上引入薄石墨烯涂层来调节锌金属均匀电化学镀/剥离并减轻副反应的有效策略。正如预期的那样，所实现的 Zn@graphene 电极表现出出色的循环耐久性超过 4000 小时，具有极低的电压滞后（0.2 mA cm ^{-2时为 28 mV）}) 并且可以在超高电流密度 (10.0 mA cm ^-2). 此外，当在循环和静止模式之间切换时，Zn@graphene 电极表现出高度可逆的锌行为，可循环 1500 次，电压响应非常稳定，显示出优异的抗腐蚀性能和高可逆性。综合研究表明，石墨烯涂层不能终止枝晶的形成和副反应，但会引导均匀的锌离子/电解质通量和均匀电场分布，以调节锌金属的均匀电化学镀/剥离，并起到保护屏障的作用降低被生长的枝晶和随机分布的副产物刺穿的风险，从而增强电化学性能并提高水性 ZIB 的安全性。