▎ 摘　　要

To meet the increasing demands of electric applications, lithium-sulfur batteries are promising energy storage systems due to their high specific capacity and energy density. However, some obstacles still hinder the practical use of lithium-sulfur batteries, which are mainly caused by the poor electronic conductivity and polysulfide migration. To deal with these problems, hollow TiO(2)spheres wrapped in graphene (HTOS/G) composites are developed and used as host materials for sulfur particles. Due to the synthetic effect of improving electronic conductivity and inhibiting the polysulfide migration by employing HTOS/G as host materials, the as-prepared HTOS/G-S composites exhibit high specific capacity and excellent cycling stability. The initial specific capacity is as high as 1263 mAh g(-1)at 0.1C. The HTOS/G-S composites display high capacity retention of 87.8% after 300 cycles at the current density of 2C.