Wang Xiangjun, Xiao Zhichang, Zhang Xinghao, Kong Debin, Wang Bin, Wu Peng, Song Yan, Zhi Linjie
School of Chemical and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan 030021, China.
Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding 071001, China.
Materials (Basel). 2022 Sep 27;15(19):6709. doi: 10.3390/ma15196709.
Herein, a three-step approach toward a multi-layered porous PBC/graphene sandwich has been developed, in which the chemical bonding interactions have been successfully enhanced via esterification between the layers of pyrolyzed bacterial cellulose (PBC) and graphene. Such a chemically induced compatible interface has been demonstrated to contribute significantly to the mass transfer efficiency when the PBC/graphene sandwich is deployed as electrode material for both supercapacitors and lithium-sulfur batteries. The high specific capacitance of the supercapacitors has been increased by three times, to 393 F g at 0.1 A g. A high initial discharge specific capacity (~1100 mAhg) and high coulombic efficiency (99% after 300 cycles) of the rPG/S-based lithium-sulfur batteries have been achieved.
在此，已开发出一种制备多层多孔PBC/石墨烯夹层的三步方法，其中通过热解细菌纤维素（PBC）层与石墨烯之间的酯化反应成功增强了化学键合相互作用。当将PBC/石墨烯夹层用作超级电容器和锂硫电池的电极材料时，这种化学诱导的相容界面已被证明对传质效率有显著贡献。超级电容器的高比电容增加了两倍，在0.1 A g时达到393 F g。基于rPG/S的锂硫电池实现了高初始放电比容量（~1100 mAhg）和高库仑效率（300次循环后为99%）。
