【摘要】：Herein, a facile strategy for the synthesis of sandwich pyrolyzed bacterial cellulose（PBC）/graphene oxide（GO） composite was reported simply by utilizing the large-scale regenerated biomass bacterial cellulose as precursor. The unique and delicate structure where three-dimensional interconnected bacterial cellulose（BC） network embedded in two-dimensional GO skeleton could not only work as an effective barrier to retard polysulfide diffusion during the charge/discharge process to enhance the cyclic stability of the Li–S battery, but also offer a continuous electron transport pathway for the improved rate capability.As a result, by utilizing pure sulfur as cathodes, the Li–S batteries assembled with PBC/GO interlayer can still exhibit a capacity of nearly 600 mAh·g-1 at 3C and only 0.055% capacity decay per cycle can be observed over 200 cycles. Additionally, the cost-efficient and environmentfriendly raw materials may enable the PBC/GO sandwich interlayer to be an advanced configuration for Li–S batteries.
【资金项目】：financially supported by the ministry of science and technology of china (no. 2012cb933403)；the national natural science foundation of china (nos. 51425302 and 51302045)；the beijing municipal science and technology commission (no. z121100006812003)
【作者单位】：Chinese Academy of Sciences Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology；Department of Environmental Engineering, University of Science and Technology of Beijing；Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology of Beijing；Institute of Forensic Science, Ministry of Public Security