Enhancing the electrochemical performance of Prussian blue analogue cathodes through mild heat treatment for sodium-ion batteries

This study developed a mild heat treatment strategy (120 °C) that effectively reduces the lattice water content of Prussian blue analogues (PBAs) from 3.24H 2 O to 1.78H 2 O, achieving a remarkable capacity retention rate of 80% even after 750 cycles.