Optimizing the Mg Doping Concentration of Na3V2–xMgx(PO4)2F3/C for Enhanced Sodiation/Desodiation Properties

Na3V2(PO4)2F3 with a NASICON (Na-superionic conductor) structure is a promising cathode material for sodium-ion batteries (NIBs) due to its high-energy density and great cycling stability. However,...