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Graphene-sulfur nanocomposites for electrodes of rechargeable lithium-sulfur batteries

A nanocomposite, sulfur battery technology, applied in the field of graphene-sulfur nanocomposite materials for rechargeable lithium-sulfur battery electrodes, can solve the limitations of Li-S battery applications and uses, poor cycle performance, poor conductivity, dissolution and Reciprocation etc.

Inactive Publication Date: 2015-07-29
BATTELLE MEMORIAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the poor electrical conductivity of elemental sulfur, the dissolution and reciprocation of polysulfide intermediates, and the resulting poor cycle performance limit the applications and uses of Li-S batteries.

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  • Graphene-sulfur nanocomposites for electrodes of rechargeable lithium-sulfur batteries
  • Graphene-sulfur nanocomposites for electrodes of rechargeable lithium-sulfur batteries
  • Graphene-sulfur nanocomposites for electrodes of rechargeable lithium-sulfur batteries

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Embodiment Construction

[0018] The following description includes a preferred best mode of an embodiment of the invention. It is clear from this description of the invention that the present invention is not limited to these illustrated embodiments, but that the present invention also includes various modifications and embodiments thereof. Accordingly, the description should be regarded as illustrative rather than restrictive. While the invention is susceptible to various modifications and alternative constructions, it should be understood that it is not intended to limit the invention to the particular forms disclosed but, on the contrary, the invention includes the spirit of the invention as defined by the claims. and all modifications, alternative constructions and equivalents within the scope.

[0019] Graphene-sulfur nanocomposites comprising alternating layer stacks of graphene sheets and sulfur particles were synthesized according to embodiments of the present invention. 80 mg of graphene sh...

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Abstract

A method of preparing a graphene-sulfur nanocomposite for a cathode in a rechargeable lithium-sulfur battery comprising thermally expanding graphite oxide to yield graphene layers, mixing the graphene layers with a first solution comprising sulfur and carbon disulfide, evaporating the carbon disulfide to yield a solid nanocomposite, and grinding the solid nanocomposite to yield the graphene-sulfur nanocomposite. Rechargeable-lithium-sulfur batteries having a cathode that includes a graphene-sulfur nanocomposite can exhibit improved characteristics. The graphene-sulfur nanocomposite can be characterized by graphene sheets with particles of sulfur adsorbed to the graphene sheets. The sulfur particles have an average diameter of less than 50 nm.

Description

[0001] Statement Regarding Federally Sponsored Research or Development [0002] This invention was made with government support under Contract No. DE-AC0576RL01830 awarded by the US Department of Energy. The US Government has certain rights in this invention. [0003] priority [0004] The present invention claims U.S. Provisional Patent Application No. 61 / 390,945, filed October 7, 2010, entitled "Graphene-Sulfur Nanocomposites for Lithium-Sulfur Batteries," and filed February 8, 2011, entitled "Graphene-Sulfur Nanocomposites Priority to U.S. Application No. 13 / 023,241 for Nanocomposites for Rechargeable Lithium-Sulfur Battery Electrodes". Background technique [0005] High-performance batteries can be used as part of the solution to supply and storage problems as well as part of the solution to environmental problems associated with replacing fossil fuel-based energy sources with clean alternatives. Due to its high theoretical specific energy density (2600Wh kg -1 ), high...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M4/58H01M4/60H01M4/04H01M10/05
CPCB82Y30/00H01M4/049Y02E60/122H01M4/1397Y10S977/773Y10S977/84H01M10/052H01M4/136Y10S977/734H01M4/623H01M4/5815Y02E60/10H01M4/04H01M4/58H01M4/60H01M10/05
Inventor 刘俊J·P·莱蒙杨振国Y·曹X·李
Owner BATTELLE MEMORIAL INST