Anatase TiO 2 , as an anode material, has the advantages of good stability, high safety, and low cost; however, the low specific capacity limits its practical application. The strategy of polypyrrole in-situ coating combined with pyrolysis was adopted in this work to improve its specific capacity. Besides, modified TiO 2 composites [((N/S)-TiO 2 @C-shere] co-doped with nitrogen/sulfur and coated by carbon nanospheres were synthesized. These composites were characterized by SEM, TEM, XRD, FTIR, XPS, BET, and TGA, and their electrochemical performance was studied by the Galvanostatic charge-discharge test and EIS measurement. The results indicated that when the dosage of pyrrole used was 1 mL, the prepared (N/S)-TiO