Aqueous　zinc-ion　batteries　are　highly　favored　for　grid-level　energy　storage　owing　to　their　low　cost　and　high　safety,　but　their　practical　application　is　limited　by　slow　ion　migration.　To　address　this,　a　strategy　has　been　developed　to　create　a　cation-accelerating　electric　field　on　the　surface　of　the　cathode　to　achieve　ultrafast　Zn2+　diffusion　kinetics.　By　employing　electrodeposition　to　coat　MoS2　on　the　surface　of　BaV6O16·3H2O　nanowires,　the　directional　built-in　electric　field　generated　at　the　heterointerface　acts　as　a　cation　accelerator,　continuously　accelerating　Zn2+　diffusion　into　the　active　material.　The　optimized　Zn2+　diffusion　coefficient　in　CC@BaV6O16·3H2O@MoS2　(7.5　×　10−8　cm2　s−1)　surpasses　that　of　most　reported　V-based　cathodes.　Simultaneously,　MoS2　serving　as　a　cathodic　armor　extends　the　cycling　life　of　the　Zn-CC@BaV6O16·3H2O@MoS2　full　batteries　to　over　10000　cycles.　This　work　provides　valuable　insights　into　optimizing　ion　diffusion　kinetics　for　high-performance　energy　storage　devices.　©　2024　Science　Press