Coordination Chemistry Regulation Suppressing Voltage Hysteresis for NaMnTi(PO) in High-Rate Sodium-Ion Batteries.

As a natrium superionic conductor, NASICON-type NaMnTi(PO) (NMTP) has garnered increasing attention for large-scale sodium-ion batteries due to its high stability and power densities. Nevertheless, it still suffers from an inferior rate capability and poor cycling longevity, arising from sluggish intrinsic kinetics and severe structural degradation. Herein, vanadium (V) is used as a dopant for equal substitution of manganese (Mn) and titanium (Ti) in NMTP to alleviate voltage hysteresis and enhance the cycling performance.