Corresponding Author

Zhi-Yuan TANG


The molybdenum-doped Li3V2-xMox(PO4)3/C (x = 0.01, 0.02 and 0.03) cathode materials were prepared with a sol-gel method by using Li2CO3, NH4H2PO4, V2O5 and MoO3 as raw materials, and citric acid as both chelating reagent and carbon source. The X-ray diffraction (XRD) analyses showed that the crystal structure of as-prepared samples is monoclinic with space group P21/n. Scanning electron microscopy (SEM) observations indicated the uniform morphology for Li3Mo0.02V1.98(PO4)3/C sample. Galvanostatic charge/discharge tests revealed that the optimal Mo-doping proportion is x = 0.02, and the best initial discharge capacity of Li3Mo0.02V1.98(PO4)3/C reaches 122.3 mAh?g-1 in the voltage range of 3.0 ~ 4.3 V at 1C rate with almost no capacity loss after 50 cycles. However, at x = 0, 0.01 and 0.03, the initial discharge capacities are 117.1 mAh?g-1,115.1 mAh?g-1 and 116.0 mAh?g-1, respectively. Even at 3C and 5C rates, the Li3Mo0.02V1.98(PO4)3/C sample also exhibits excellent electrochemical performance.

Graphical Abstract


cathode material, lithium vanadium phosphate, Mo-doping, sol-gel

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