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Li2S BATTERIES HAVING HIGH CAPACITY, HIGH LOADING, AND HIGH COULOMBIC EFFICIENCY

United States Patent Application

20170179474
A1
View the Complete Application at the US Patent & Trademark Office
An electrochemical device includes a cathode containing graphene-wrapped Li.sub.2S nanoparticles. The graphene-wrapped Li.sub.2S nanoparticles are prepared by a method including heating lithium metal, and a carbon-sulfur source or a carbon source and a sulfur source in a sealed container at a temperature to produce lithium vapors, and vapors of the carbon-sulfur source or vapors of the carbon source and vapors of the sulfur source; and cooling the sealed container to produce the graphene-wrapped Li.sub.2S nanoparticles.
Lu, Jun (Bolingbrook, IL), Xu, Rui (Westmont, IL), Amine, Khalil (Oakbrook, IL), Ji, Xiulei (Corvallis, OR)
14/ 971,676
December 16, 2015
GOVERNMENT RIGHTS [0001] The United States Government has rights in this invention pursuant to Contract No. DE-AC02-06CH11357 between the U.S. Department of Energy and UChicago Argonne, LLC, representing Argonne National Laboratory.