Manipulating Phase Stability and Kinetics in Prussian Blue Cathode via Entropy Engineering and d10 Cation Incorporation for Potassium-Ion Batteries

, remarkable cycling stability with a capacity retention of 82.1% after 100 cycles and long lifespan over 300 cycles, and significantly enhanced rate capability. The fabricated high-energy-density K-ion full batteries achieve ultralong lifespan over 2500 cycles with an ultralow capacity-decay-rate of 0.017% per cycle.