Aqueous Zn-ion batteries (ZIBs) have great potential in the field of large-scale energy storage. However, the dendrite formation on Zn anodes hinders the practical applications of ZIBs. Herein, a zincic perfluorinated sulfonic acid membrane (ZPSAM) is prepared as a quasi-solid single-ion conductor. In this membrane, Zn-ions move along with the negatively charged branched chains which possess a limited degree of freedom, forming fast Zn-ion transport channels. Consequently, ZPSAM exhibits high conductivity (∼1.17×10^-3 S cm^-1), enabling stable Zn plating and stripping processes at a current density of 2 mA cm^-2 over 2000 cycles. In addition, due to the confined anion matrix in the membrane, dendrite formation and side reaction are both effectively suppressed. Finally, by applying the electrolyte in both aqueous super-capacitor and Zn-ion batteries, significantly improved cycling performance can be achieved. This work demonstrates a promising solution for the practical use of Zn metal anode in neutral aqueous media, and thus benefits the development of low-cost, high-performance aqueous energy storage devices.

锌离子水电池（ZIBs）在大规模储能领域具有巨大潜力。但是，在锌阳极上形成枝晶阻碍了ZIBs的实际应用。在此，制备全氟磺酸锌膜（ZPSAM）作为准固体单离子导体。在该膜中，Zn离子与具有有限自由度的带负电荷的支链一起移动，从而形成快速的Zn离子传输通道。因此，ZPSAM表现出高电导率（〜1.17×10 ^-3 S cm ^-1），能够在2 mA cm ^-2的电流密度下实现稳定的Zn镀覆和剥离工艺超过2000个周期。此外，由于在膜中的阴离子基质有限，因此枝晶的形成和副反应均得到有效抑制。最后，通过将电解质应用于水性超级电容器和Zn离子电池中，可以显着提高循环性能。这项工作证明了在中性水性介质中实际使用Zn金属阳极的有希望的解决方案，因此有利于开发低成本，高性能的水性储能装置。