S-TiO2 composite cathode materials for lithium/sulfur batteries

TiO2 nanofibers were prepared by improved electrospinning technique and subsequent thermal treatment. The as-prepared TiO2 nanofibers possess anatase-rutile mischcrystal structure. Sulfur was mixed with the TiO2 nanofibers to form S-TiO2 composite by a melt diffusion process. The S-TiO2 composite displays more excellent discharge capacity retention of 58% after 50 cycles compared to pure S, and the discharge capacity is 530 mAh g(-1) after 50 cycles, which is ascribed to the adsorption of lithium polysulfide by TiO2. (C) 2014 Elsevier B.V. All rights reserved.