Local Electric Field Accelerates Zn2+ Diffusion Kinetics for Zn‐V Battery

Abstract Vanadium‐based aqueous zinc‐ion batteries (AZIBs) exhibit significant potential for large‐scale energy storage applications, attributed to their inherent safety characteristics. Addressing the slow transport kinetics of divalent Zn 2+ within the cathode lattice, thereby enhancing the rate capability and stability, is essential for the Zn‐V battery system. In this study, a local electric field (LEF) strategy is introduced to accelerate the Zn 2+ diffusion by creating abundant oxygen vacancies (Ov) in V 2 O 5 . Comprehensive characterization and density functional theory (DFT) calculations reveal the formation of the Ov induced atomic‐level donor‐acceptor couple configuration, verify and visualize the LEF. The fabricated LEF‐enhanced vanadium oxide (LEF‐VO) exhibits exceptional rate capability, achieving 338.3 mA h g −1 at a current density of 10 A g −1 , and maintaining 66.4% of its capacity over a range from 0.2 to 20 A g −1 . Furthermore, the influence of the LEF on expediting Zn 2+ diffusion kinetics is elucidated, correlating to the electrical force. This novel LEF approach offers valuable insights for advancing high‐rate cathode materials.