▎ 摘　　要

A high reversible Li-ion storage capacity (200 mAh/g) with C/10 rate and good rate capability is achieved in reduced graphene oxide (rGO) wrapped anatase mesoporous TiO2 nanofiber anodes fabricated by electrospinning. X-ray analysis of rGO wrapped TiO2 nanofibers confirmed the crystalline anatase structure of TiO2, while Raman spectroscopy established high frequency shift caused by the interaction of TiO2 with 2-4 layers of rGO. FT-IR analysis of rGO wrapped TiO2 nanofibers revealed disappearance of C-C, C-O, and C-OH stretching frequencies suggesting the successful reduction of GO to graphene, further confirmed by X-ray Photoelectron spectroscopy. The BET surface area of TiO2 nanofibers (54 m(2) g(-1)) increased to 105 m(2) g(-1) after wrapping rGO leading to mesoporous structure with pore diameters 5-20 nm, complementary observations with scanning and transmission electron microscopies. The oxidation/reduction peaks revealed lithium insertion and lithium extraction mechanism, from 1D TiO2 fibers with superior electrode/electrolyte contacts, with shorter Li-ion diffusion length and improved ionic conductivity. Successful anchoring of rGO on TiO2 nanofiber with Ti3+-C bonds energetically favors the electrochemical reaction yielding high rate and specific TiO2 capacity as a promising anode of lithium ion battery.