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    Method of preparing graphene-sulfur nanocomposites for rechargeable lithium-sulfur battery electrodes
    1.
    发明授权
    Method of preparing graphene-sulfur nanocomposites for rechargeable lithium-sulfur battery electrodes 有权
    制备用于可再充电锂硫电池电极的石墨烯 - 硫磺纳米复合材料的方法

    公开(公告)号：US08999574B2

    公开(公告)日：2015-04-07

    申请号：US14225561

    申请日：2014-03-26

    Applicant: Battelle Memorial Institute

    Inventor： Jun Liu ,  John P. Lemmon ,  Zhenguo Yang ,  Yuliang Cao ,  Xiaolin Li

    IPC: H01M4/04 ,  B82Y30/00 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/58 ,  H01M4/62 ,  H01M10/052

    CPC classification number: H01M4/049 ,  B82Y30/00 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/5815 ,  H01M4/623 ,  H01M10/052 ,  Y02E60/122 ,  Y10S977/734 ,  Y10S977/773 ,  Y10S977/84

    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.

    Abstract translation: 一种制备用于可再充电锂硫电池中的阴极的石墨烯 - 硫磺纳米复合材料的方法，包括热膨胀石墨烯氧化物以产生石墨烯层，将石墨烯层与包含硫和二硫化碳的第一溶液混合，蒸发二硫化碳，产生 固体纳米复合材料，研磨固体纳米复合材料，得到石墨烯 - 硫磺纳米复合材料。 具有包含石墨烯 - 硫磺纳米复合材料的阴极的可充电锂硫电池可以表现出改进的特性。 石墨烯 - 硫磺纳米复合材料可以用石墨烯片表征，其中硫的颗粒吸附到石墨烯片上。 硫颗粒的平均直径小于50nm。

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