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    • 75. 发明申请
    • STABLE DISPERSIONS OF SINGLE AND MULTIPLE GRAPHENE LAYERS IN SOLUTION
    • 单个和多个石墨层在溶液中的稳定分散
    • US20150270548A1
    • 2015-09-24
    • US14666692
    • 2015-03-24
    • BELENOS CLEAN POWER HOLDING AG
    • Reinhard NesperTommy Kaspar
    • H01M4/587H01B13/32H01B1/04
    • H01M4/587B82Y30/00B82Y40/00C01B32/192C01B2204/02C01B2204/28C01B2204/30H01B1/04H01B13/32H01M10/052Y02E60/324Y02P70/54Y10T428/30
    • A method for producing colloidal graphene dispersions comprises the steps of: (i) stirring graphite oxide in an aqueous dispersion medium to form a dispersion; (ii) determining if the dispersion is optically clear in a light microscope at 1000 fold magnification after 1 to 5 hours of stirring, and, if not clear, removing any undissolved impurities in the dispersion, in order to form a colloidal graphene oxide dispersion, or a multi-graphene oxide dispersion, that is optically clear in a light microscope at 1000 fold magnification; and (iii) thermally reducing the graphene oxide, or multi-graphene oxide, in dispersion in the aqueous dispersion medium at a temperature between 120° C. and 170° C. under pressure in order to ensure that the dispersion medium is not evaporated to form a stable colloidal graphene dispersion or a stable multi-graphene dispersion. Using the method used for the preparation of the starting dispersion a graphene or a multi-graphene dispersion is obtained that can be further processed to multi-graphene with larger inter-planar distances than graphite. Such dispersions and multi-graphenes are suitable materials in the manufacturing of rechargeable lithium ion batteries.
    • 制备胶体石墨烯分散体的方法包括以下步骤:(i)在水性分散介质中搅拌石墨氧化物以形成分散体; (ii)在1〜5小时的搅拌后,在光学显微镜中以1000倍放大率确定分散体是否光学透明,如果不清楚,则除去分散体中的任何未溶解的杂质,以形成胶态石墨烯氧化物分散体, 或多石墨烯氧化物分散体,其在1000倍放大倍数的光学显微镜中是光学透明的; 和(iii)在120℃和170℃之间的温度下在压力下将氧化石墨烯或氧化石墨烯在热分解中热分解,以确保分散介质不被蒸发 形成稳定的胶体石墨烯分散体或稳定的多石墨烯分散体。 使用用于制备起始分散体的方法,获得石墨烯或多石墨烯分散体,其可以进一步加工成具有比石墨更大的平面间距离的多石墨烯。 这种分散体和多石墨烯是可再生锂离子电池制造中的合适材料。