Regulation of local chemistry in O3-type layered oxide cathodes for practical sodium-ion batteries

and a capacity retention of 73.69% after 500 cycles. More importantly, HEO exhibits impressive temperature tolerance, superior air stability and acceptable full-cell performance, demonstrating its huge potential for practical SIBs application. This work develops a versatile cation-anion dual-site high-entropy doping strategy to modulate the local chemistry of O3-type layered oxide cathodes, furnishing a robust foundation for advancing cathode materials for practical SIBs.