Dual-site doping constructs impurity-free Na3V2(PO4)2F3 cathodes for wide-temperature ultralong cycling sodium-ion batteries.
Na Super Ionic Conductor (NASICON-type) Na3V2(PO4)2F3 (NVPF) is widely recognized as a promising cathode material for sodium-ion batteries (SIBs). However, the low intrinsic electronic conductivity, slow sodium-ion diffusion kinetics, and the inevitable formation of Na3V2(PO4)3 (NVP) impurities have hindered its develo...