SULFUR-CARBON COMPOSITE COMPRISING A HIGHLY GRAPHITIC CARBON MATERIAL FOR LITHIUM-SULFUR BATTERIES AND PROCESS FOR PREPARING THE SAME

SULFUR-CARBON COMPOSITE COMPRISING A HIGHLY GRAPHITIC CARBON MATERIAL FOR LITHIUM-SULFUR BATTERIES AND PROCESS FOR PREPARING THE SAME

Provided is a sulfur-carbon composite comprising a highly graphitic carbon material and sulfur, wherein the carbon material has a high graphitization degree characterized by a ratio of the intensity of G band to the intensity of D band in Raman spectrum being more than 1.0, the material is either a...

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Bibliographische Detailangaben
Hauptverfasser: Chen, Yunhua, Zhao, NaHong, Yin, Yaxia, Guo, Yuguo, Zhang, Juan
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS THEREOF
ELECTRICITY
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Zusammenfassung:Provided is a sulfur-carbon composite comprising a highly graphitic carbon material and sulfur, wherein the carbon material has a high graphitization degree characterized by a ratio of the intensity of G band to the intensity of D band in Raman spectrum being more than 1.0, the material is either a graphitic microporous carbon substrate, or a core-shell material with a conductive core coated by a graphitic microporous carbon layer, and wherein sulfur is encapsulated into the porous structure of the carbon material. Also provided are an electrode and a lithium-sulfur battery comprising the sulfur-carbon composite, and a process for preparing the sulfur-carbon composite.