Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 41, Pages 22077-22081Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm30632h
Keywords
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Funding
- Ministry of Science and Technology [2011CB935902, 2010DFA72760]
- National Natural Science Foundation of China [20901046]
- Tsinghua University Initiative Scientific Research Program [2010THZ08116, 2011THZ08139, 2011THZ01004]
- State Key Laboratory of Automotive Safety and Energy [ZZ2012-011]
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Li/S batteries have attracted great attention in the last twenty years, as they offer the advantage of high gravimetric energy densities over the current conventional Li-ion systems. Besides elemental sulphur based composites, sulphur-poly(acrylonitrile)-based materials are promising candidates for Li/S batteries. Though the structure of the sulphur-poly(acrylonitrile)-based material is still debated, the effects of the synthesis conditions on the material structure, and thus on the electrochemical performance, are undoubted. Here the synthesis process of sulphur-poly(acrylonitrile)-based material is probed by scanning electron microscopy (SEM), infrared spectroscopy (IR) and ultraviolet visible spectroscopy (UV-vis), and the relationships among the synthesis conditions, material structures, and electrochemical behaviours are clarified. Consequently, the optimized synthesis is determined, by which the prepared sulphur-poly(acrylonitrile)-based material delivers a high initial coulombic efficiency of 85.6%, a high stable cycling capacity of over 795 mA h g(-1), and high capacity retention of over 98.1% after 50 cycles.
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