Cathodic Performance of LiVOPO₄ Prepared by Impregnation Method for Li Ion Secondary Battery

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Synthesis and the electrochemical Li de-intercalation properties of LiVOPO₄ as the alternative cathode material for Li ion rechargeable battery were investigated. Two types of LiVOPO₄ structures, orthorhombic and triclinic phases can be prepared by changing calcination temperature. At current density of 0.04 mAcm⁻² (C/50), orthorhombic phase shows the discharge capacity of 90 mAhg⁻¹ with flat potential of 3.7 V vs. Li/Li⁺, however, almost no Li de-intercalation capacity was observed on triclinic phase. Orthorhombic phase is also exhibited a good cycle stability for Li de-intercalation and intercalation.