Abstract
To restrict the polysulfide migration effectively, the fabrication of sulfur host material with strong polysulfide adsorption is necessary. Herein, we grafted the cation on SBA-15 surface to achieve the high-efficiency polysulfide reservoir through electrostatic force and the derived Im-SBA-15/CNT hybrid could exhibit a promising application potential as a host material for sulfur cathode owing to the strong polysulfide adsorption of Im-SBA-15 and the successful electron conduction of CNT. As a result, the Im-SBA-15/CNT/S composite delivers a superior electrochemical performance. Even after 350 cycles, Im-SBA-15/CNT/S cathode also could show a capacity of 682.3 mAh/gsulfur with no obvious capacity fading. This work demonstrates a promising polysulfide suppression strategy for high-performance sulfur cathode.
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