Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 5, Issue 10, Pages 8901-8906Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ee22294a
Keywords
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Funding
- MOST [2011CB932604, 2011CB932601]
- National Science Foundation of China [50921004, 51172239]
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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 g(sulphur)(-1) (23 wt% S) and 520 mA h g(sulphur)(-1) (50 wt% S) at a high current density (6 A g(sulphur)(-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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