Lithium-sulfur(Li-S)batteries are anticipated as one of the most promising candidates for the highenergy-density storage systems.However,the insulating nature and shuttling effect of sulfur severely limits their performance.The incorporation of sulfur with carbon materials has been deemed as one of the most powerful strategies to improve electrical conductivity and suppress soluble polysulfide shuttling.Herein,a novel three-dimensional carbon framework(3DCF)is prepared and employed as a sulfur host(3DCF@S)for Li-S batteries.The 3DCF not only supplies abundant paths for lithium ion diffusion and electron transport,but also strengthens polysulfide immobilization during the lithium/sulfur conversion reactions.As a result,the 3DCF@S with high sulfur content of 90%exhibits a high capacity of 1366 mA h/g at 0.1 C and excellent cycling stability with a satisfactory capacity of 601 mA h/g after 600 cycles at 2.0 C.The resultant Li-S button battery based 3DCF@S electrode could power a light-emitting diode for 2 h.The acquired 3DCF@S is expected to be widely used in Li-S batteries and this study will promote developments of carbon/sulfur composites for Li-S batteries.
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机译:1-Benzyl-4-(4-nitrophenyl)-2,3-dihydro-1H-1,5-benzodiazepine: a three-dimensional framework structure generated by two C-H...O hydrogen bonds and one C-H...pi(arene) hydrogen bond.
机译:1-Benzyl-4-(4-nitrophenyl)-2,3-dihydro-1H-1,5-benzodiazepine: a three-dimensional framework structure generated by two C-H center dot center dot center dot O hydrogen bonds and one C-H center dot center dot center dot pi(arene) hydrogen bond
机译:(Battery Division Student Research Award Sponsored by Mercedes-Benz Research Development) Sustainable High-Performance Lithium-Ion Batteries: Aqueous Processing of Cobalt-Free High-Energy Cathodes