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    • 11. 发明授权
    • Carbonaceous material and lithium secondary batteries comprising same
    • 含碳材料和包含其的锂二次电池
    • US06733922B2
    • 2004-05-11
    • US10087247
    • 2002-03-01
    • Keiko MatsubaraToshiaki TsunoKyou-Yoon Sheem
    • Keiko MatsubaraToshiaki TsunoKyou-Yoon Sheem
    • H01M458
    • H01M4/40H01M4/362H01M4/366H01M4/405H01M4/587Y10T428/29Y10T428/2918Y10T428/30
    • Disclosed is a carbonaceous material comprising a graphite particle having a 002 plane interval d002 of less than 0.337 nm as measured by the X-ray wide angle diffraction method; a complex particle disposed and distributed in the vicinity of the surface of the graphite particle, the complex particle comprising silicon and carbon and having a particle size smaller than that of the graphite particle; and an amorphous carbon layer with a plane interval d002 of more than 0.37 nm, the amorphous carbon layer being a polymer layer and being coated on the graphite particle and the complex particle, wherein the complex particle comprises a Si particulate, a conductive carbon material disposed and distributed in the vicinity of the surface of the Si particulate, and a rigid carbon material layer coated on the Si particulate and the conductive carbon material, the Si particulate being composed of a crystalline Si phase. The carbonaceous material has a high harge-discharge capacity and improved cycle-life characteristics.
    • 公开了一种含有通过X射线广角衍射法测定的具有小于0.337nm的002平面间隔d 002的石墨颗粒的碳质材料; 配置并分布在石墨颗粒表面附近的复合颗粒,所述复合颗粒包含硅和碳,并且具有比石墨颗粒小的粒度; 以及平面间隔d002大于0.37nm的无定形碳层,所述无定形碳层为聚合物层并被涂覆在所述石墨颗粒和所述复合颗粒上,其中所述复合颗粒包含Si颗粒,所述导电碳材料设置 并分布在Si颗粒的表面附近,以及涂覆在Si颗粒和导电碳材料上的刚性碳材料层,Si颗粒由晶体Si相组成。 含碳材料具有高的排气能力和循环寿命特性。