<p>Surface engineering via N₂ plasma-based ion implantation is presented as a rapid strategy to boost the zinc-storage performance of manganese hexacyanoferrate (MnHCF) cathodes. Precise control of the plasma exposure duration is shown to be essential, with a 1-minute treatment (MnHCF-N1) providing the most significant enhancements in capacity and stability. The MnHCF-N1 electrode exhibits a high specific capacity of 130.9 mAh g^-1, which represents a 20% increase compared to the pristine sample. Physical characterizations reveal that the 1-minute plasma exposure induces beneficial surface nanopore and a monoclinic-like phase. These structural modifications facilitate faster charge transfer and Zn²⁺ diffusion kinetics. This approach offers a facile and efficient route for optimizing the electrochemical properties of Prussian blue analogues in aqueous storage system.</p> Graphical Abstract <p></p>