The effect of doping Mg2+ on the structure and electrochemical properties of Li3V2(PO4)3 cathode materials for lithium-ion batteries

► The Mg-doping content has an important effect on the structural and electrochemical performance of Li3V2(PO4)3 materials. ► The solid solution phase range of the Li3V2−xMgx(PO4)3 materials is 0 ≤ x ≤ 0.27. ► x = 0.5 is an optimal doping content for the electrochemical performance of the materials.