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US 10,170,756 B2Granted
Li2S batteries having high capacity, high loading, and high coulombic efficiency
AssigneeUchicago Argonne, LLC
InventorsJun Lu, Rui Xu, Khalil Amine, Xiulei Ji
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Abstract
An electrochemical device includes a cathode containing graphene-wrapped Li2S nanoparticles. The graphene-wrapped Li2S 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 Li2S nanoparticles.
Claims12
A method of preparing graphene-wrapped Li2S nanoparticles, the method comprising:
- heating lithium metal and a carbon-sulfur source or lithium metal, 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 lithium vapors, vapors of the carbon source, and vapors of the sulfur source;
- and
- cooling the sealed container to produce the graphene-wrapped Li2S nanoparticles.
Dependencies are inferred from the claim text.