Liquid-phase synthesis of highly dispersed NaFeF3 particles and their electrochemical properties for sodium-ion batteries

► Highly dispersed NaFeF3 particles were prepared by liquid-phase synthesis using organic solution. ► The particle sizes of NaFeF3 could be controlled by the composition of the synthetic solution. ► The discharge capacity was higher for NaFeF3 that had a smaller particle size at high discharge rate. ► The use of well-dispersed nano-sized NaFeF3 particles effectively improves the rate performance.