Direct Observation of Sulfur Radicals as Reaction Media in Lithium Sulfur Batteries
نویسندگان
چکیده
منابع مشابه
Capacity Fade Analysis of Sulfur Cathodes in Lithium–Sulfur Batteries
Rechargeable lithium-sulfur (Li-S) batteries are receiving ever-increasing attention due to their high theoretical energy density and inexpensive raw sulfur materials. However, their rapid capacity fade has been one of the key barriers for their further improvement. It is well accepted that the major degradation mechanisms of S-cathodes include low electrical conductivity of S and sulfides, pre...
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Lithium-Sulfur (Li-S) batteries are considered as one of the promising candidates for next-generation Li batteries in near future. Although, these batteries are suffering from certain drawbacks such as rapid capacity fading during the charge and discharge process due to the dissolution of polysulfides. In this paper, Sulfur/metal oxide (TiO2 and SiO2) yolk–shell structures have been successfull...
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The commercialization of lithium-sulfur batteries is hindered by low cycle stability and low efficiency, which are induced by sulfur active material loss and polysulfide shuttle reaction through dissolution into electrolyte. In this study, sulfur-impregnated disordered carbon nanotubes are synthesized as cathode material for the lithium-sulfur battery. The obtained sulfur-carbon tube cathodes d...
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Here, we report a two-step synthesis of graphene/sulfur/carbon ternary composite with a multilayer structure. In this composite, ultrathin S layers are uniformly deposited on graphene nanosheets and covered by a thin layer of amorphous carbon derived from β-cyclodextrin on the surface. Such a unique microstructure, not only improves the electrical conductivity of sulfur, but also effectively in...
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The lithium–sulfur battery is a promising system for the future generation of rechargeable batteries. Its main advantages are the high theoretical capacity (1675 Ah kgS), high energy density (2500 Wh kgS), and low cost of sulfur. So far, the commercial application of this battery has been hindered by the reduced cyclelife. The isolating properties of sulfur as well as the formation of polysulf...
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ژورنال
عنوان ژورنال: Journal of The Electrochemical Society
سال: 2015
ISSN: 0013-4651,1945-7111
DOI: 10.1149/2.0851503jes