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Lithium/Sulfur Batteries Based on Doped Mesoporous Carbon

Oak Ridge National Laboratory

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PDF Document Publication11-G00232_ID2519.pdf (729 KB)


Technology Marketing SummaryA sulfur/carbon composite material was prepared by heat treatment of doped mesoporous carbon and elemental sulfur at a temperature inside a stainless steel vessel, which was used in lithium/sulfur batteries that were tested in electrolytes.DescriptionAt 25 C and under a current density of 84mA g-1, the battery based on one embodiment of the invention showed an initial discharge capacity of 460mAh g-1 and a reversible cycling capacity of 350mAh g-1, while the one based on another embodiment of the invention exhibited an initial discharge capacity of 549mAh g-1 and a reversible cycling capacity of 544mAh g-1. At 50 C, the initial discharge capacities were improved significantly. For example, under a current density of 194 mA g-1 the initial discharge capacities of the batteries based on the above referenced embodiments increased to 1176 and 1298 mAh g-1, respectively. In addition, at 50 C the batteries showed good cycling performance and rate capability.Benefits•Doped mesoporous carbon has catalytic effect on sulfur reduction and offers higher discharge voltage and higher capacity than activated carbon (AC)
•Use of electrolytes is safer and more environmentally benign
•Electrolytes have good stability towards polysulfides
•Good capacity rentention at 25 C •Increased rate tolerance with higher temperatures
Applications and Industries•Batteries, including batteries for electric vehiclesMore InformationApplication in preparation: Xiao-Guang Sun, Chemical Sciences Division, Oak Ridge National LaboratoryTechnology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
UT-B ID 201102519PrototypeAvailable11/21/201110/25/2011

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To: Jennifer Tonzello Caldwell<caldwelljt@ornl.gov>