Electrochemical performance of anodized TiO 2 nanotubes for rechargeable lithium batteries

Abstract

The electrochemical storage performance of anatase TiO 2 nanotubes (NT) is compared to the performance of TiO 2 nanotubes covered by sulfur. Charge/discharge curves and cycling performance of TiO 2 NT with and without sulfur deposition with respect to lithium anodes are demonstrated in electrochemical test cells. At 0.5C cycle rate the TiO 2 NT exhibited a first cycle specific charge/discharge capacity of 180/155 mAh/g, whereas the TiO 2 NT deposited with sulfur showed a remarkably higher performance at 0.5C cycle rate with first cycle charge/discharge specific capacities of 258/260 mAh/g and a coulombic efficiency of 98%. © 2011 Materials Research Society.