碳纳米管
阴极
材料科学
硫黄
纳米技术
膜
电流密度
导电体
电导率
碳纤维
化学工程
化学
复合数
复合材料
工程类
冶金
物理化学
生物化学
物理
量子力学
作者
Guangmin Zhou,Da‐Wei Wang,Feng Li,Peng‐Xiang Hou,Lichang Yin,Chang Liu,Gao Qing Lu,Ian R. Gentle,Hui–Ming Cheng
摘要
We report the template-directed synthesis of sulphur–carbon nanotubes and their use to form a membrane that is binder-free, highly conductive and flexible. This nanostructured membrane is used as a self-supporting cathode without metal current-collectors for Li-S batteries. The membrane cathode has a high electrical conductivity and renders a long life of sulphur of over 100 charge–discharge cycles. High discharge capacity of sulphur was attained at 712 mA h gsulphur−1 (23 wt% S) and 520 mA h gsulphur−1 (50 wt% S) at a high current density (6 A gsulphur−1). The overall capacity of the flexible cathode correspondingly reaches 163 mA h g−1 (23 wt% S) and 260 mA h g−1 (50 wt% S). These results demonstrate the great potential of this nanostructured flexible membrane as a cathode for Li-S batteries with fast charge–discharge performance and long life.
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