Doped modified lithium vanadium phosphate anode material as well as preparation method and application thereof

The invention provides a preparation method of a doped modified lithium vanadium phosphate anode material. The preparation method comprises the steps: (1) mixing a lithium source, a vanadium source, a phosphorus source, a gadolinium source and a reducing agent cane sugar to obtain a mixture, mixing the mixture with deionized water to obtain a mixed solution, and grinding the mixed solution to obtain a rheological phase solid-liquid mixture; (2) transferring the rheological phase solid-liquid mixture to a high-pressure reaction kettle, and reacting for 8 to 15 hours to obtain a precursor; (3) drying the precursor; (4) sintering the dried precursor for 3 to 5 hours at the temperature of 300 to 400 DEG C, and naturally cooling the sintered precursor to obtain a pretreated material; (5) sintering the pretreated material for 6 to 10 hours at the temperature of 700 to 850 DEG C, and naturally cooling the pretreated material to obtain black solids, wherein the black solids are the gadolinium-doped lithium vanadium phosphate anode material. The invention also provides an anode material prepared by the method and an application of the anode material. The method is simple in process, low in synthetic temperature and suitable for mass production; moreover, synthetic gadolinium-doped material particles are more uniform in distribution, and the electrochemical property is greatly improved.