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    • 34. 发明授权
    • Nano graphene reinforced nanocomposite particles for lithium battery electrodes
    • 用于锂电池电极的纳米石墨烯增强纳米复合颗粒
    • US08580432B2
    • 2013-11-12
    • US12315555
    • 2008-12-04
    • Aruna ZhamuBor Z. JangJinjun Shi
    • Aruna ZhamuBor Z. JangJinjun Shi
    • H01M4/02
    • H01M4/587H01M4/133H01M10/0525
    • A solid nanocomposite particle composition for lithium metal or lithium ion battery electrode applications. The composition comprises: (A) an electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 μm; (B) nano graphene platelets (NGPs); and (C) a protective matrix material reinforced by the NGPs; wherein the graphene platelets and the electrode active material are dispersed in the matrix material and the NGPs occupy a weight fraction wg of 1% to 90% of the total nanocomposite weight, the electrode active material occupies a weight fraction wa of 1% to 90% of the total nanocomposite weight, and the matrix material occupies a weight fraction wm of at least 2% of the total nanocomposite weight with wg+wa+wm=1. For a lithium ion battery anode application, the matrix material is preferably amorphous carbon, polymeric carbon, or meso-phase carbon. Such a solid nanocomposite composition provides a high anode capacity and good cycling stability. For a cathode application, the resulting lithium metal or lithium ion battery exhibits an exceptionally high cycle life.
    • 一种用于锂金属或锂离子电池电极应用的固体纳米复合颗粒组合物。 组合物包括:(A)尺寸小于1μm的细颗粒,棒,线,纤维或管的形式的电极活性材料; (B)纳米石墨烯血小板(NGPs); 和(C)由NGP加强的保护性基质材料; 其中石墨烯片晶和电极活性材料分散在基体材料中,NGP占总纳米复合材料重量的1%至90%的重量分数wg,电极活性材料占重量分数wa为1%至90% 的总纳米复合材料重量,并且基质材料占ww + wa + wm = 1的总纳米复合材料重量的至少2%的重量分数wm。 对于锂离子电池阳极应用,基体材料优选为无定形碳,聚合碳或中间相碳。 这种固体纳米复合材料组合物提供高的阳极容量和良好的循环稳定性。 对于阴极应用,所得到的锂金属或锂离子电池具有非常高的循环寿命。