Mo‐Doped Perovskite Cathode Enables High‐Performance Cycling‐Stable Zinc‐Ion Batteries

Abstract Manganese compounds have emerged as promising cathode materials for aqueous zinc‐ion batteries (AZIBs). But their broader applications are impeded by such cathodes' poor structure stability and sluggish ion transportation. Herein, these limitations are addressed by proposing high‐valence Mo doping regnant LaMnO 3 perovskite oxide cathodes to develop high‐performance rate stable AZIBs. The optimized doped cathode contributes a highest specific capacity of 445 mAh g −1 at the current density of 0.5 A g −1 , which maintains 206 mAh g −1 at 2 A g −1 and accompanies with a remarkable capacity retention of 114% beyond 1000 cycles for continuous charge/discharge process. The doping of multivalent Mo is revealed to boost the energy storage capacity and stabilize the electrode structure via various ex situ characterization and theoretical calculations. Importantly, the incorporation of Mo facilitates the acceleration of reaction kinetics and sufficient charge transfer with H + and Zn 2+ as dual charge carriers, where H + plays a dominant role. This work provides a new perspective on developing innovative perovskite oxide cathodes with high‐valence metal doping for AZIBs.