The spontaneous parasitic reactions (hydrogen evolution, dendrite growth, etc.) of Zn metal hinder the commercial application of aqueous zinc ion batteries. Herein, a highly adhesive zinc-ion conductive buffer polymer layer is constructed using polyvinyl formal (PVF) to prevent these parasitic reactions to enhance the reversibility of Zn deposition. This dense artificial buffer layer can not only effectively isolate the direct contact between the anode and the electrolyte, but also accommodate volume expansion during Zn plating/stripping and guide the process of Zn nucleation. Specifically, this PVF layer increases the nucleation overpotential and promotes Zn²⁺ three-dimensional diffusion process to homogenize the Zn²⁺ flux underneath the layer. Hence, the PVF@Zn exhibits no dendrites and high cycling stability with a lifespan of 5200 h, which is a 35-fold enhancement compared with Zn, and can even run at an ultrahigh current density of 40.0 mA cm⁻². Moreover, the PVF@Zn∥Na₂V₆O₁₆ full cell maintains a specific capacity of 172.4 mA h g⁻¹ (2400 cycles at 1.0 A g⁻¹). This proposed strategy provides a practical insight into designing an excellent-performance Zn anode by eliminating the parasitic reactions and modulating the nucleation of Zn deposition.

锌金属的自发寄生反应（析氢、枝晶生长等）阻碍了水系锌离子电池的商业应用。在此，使用聚乙烯醇缩甲醛（PVF）构建了高粘合性锌离子导电缓冲聚合物层，以防止这些寄生反应，从而增强锌沉积的可逆性。这种致密的人造缓冲层不仅可以有效隔离阳极和电解液之间的直接接触，而且可以适应镀锌/剥离过程中的体积膨胀并引导锌成核过程。具体而言，该PVF层增加了成核过电势并促进Zn ²⁺三维扩散过程以使该层下方的Zn ²⁺通量均匀化。因此，PVF@Zn表现出无枝晶和高循环稳定性，寿命为5200小时，比Zn提高了35倍，甚至可以在40.0 mA cm ^-2的超高电流密度下运行。此外，PVF@Zn||Na ₂ V ₆ O _{16全电池保持172.4 mA hg} ^-1的比容量（1.0 A g ^-1下2400次循环）。该策略通过消除寄生反应和调节锌沉积的成核，为设计高性能锌阳极提供了实用的见解。