Data from: Electrospinning preparation of oxygen-deficient nano TiO2-x/ carbon fiber membrane as a self-standing high performance anode for Li-ion battery

Improving the specific capacity and electrical conductivity of TiO2 can boost its practical application as a promising anode material for lithium ion battery. In this work, a three-dimensional (3D) networking oxygen-deficient nano TiO2-x/ carbon fiber membrane was achieved by combining the electrospinning process with a hot-press sintering method and directly used as a self-standing anode. With the synergistic effects of 3D conductive networks, surface oxygen deficiency, high specific surface area and high porosity, binder-free and self-standing structure, etc., the nano TiO2-x / carbon fiber membrane electrode displays a high electrochemical reaction kinetics and a high specific capacity. The reversible capacity could be jointly generated from porous carbon, full-lithiation of TiO2 and interfacial lithium storage. At a current density of 100 mA/g, the reversible discharge capacity can reach 464 mAh/g. Even at 500mA/g, the discharge capacity still remains 312mAh/g. Compared with pure carbon fiber and TiO2 powder, the TiO2-x/C fiber membrane electrode also exhibits an excellent cycle performance with a discharge capacity of 209mAh/g after 700 cycles at the current density of 300 mA/g, and the coulombic efficiency always maintains at ~100%.