Stabilizing the Structure and Enhancing the Kinetics of O3-Type Layered Cathodes for High-Performance Sodium-Ion Batteries via Targeted Multi-Element Synergistic Doping.

) and outstanding cycling stability (76.2% capacity retention) over 300 cycles. This work underscores the efficacy of multi-site synergistic doping strategy in designing high-performance layered oxide cathodes for practical SIBs.