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    NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD OF THE SAME, AND LITHIUM SECONDARY BATTERY CONTAINING THE SAME
    1.
    发明公开
    NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD OF THE SAME, AND LITHIUM SECONDARY BATTERY CONTAINING THE SAME 审中-公开
    二次电池用负极活性材料的锂，工艺用于生产和锂二次电池

    公开(公告)号：EP2282367A1

    公开(公告)日：2011-02-09

    申请号：EP09738953.0

    申请日：2009-04-28

    申请人： Ls Mtron Ltd. ,  SHOWA DENKO K.K.

    发明人： HAN, Jung-Min ,  OH, Jeong-Hun ,  KIM, Jong-Sung ,  YOUM, Chul ,  HAN, Kyung-Hee ,  TAKEUCHI, Masataka ,  SUDOH, Akinori ,  SOTOWA, Chiaki

    IPC分类号： H01M4/58

    CPC分类号： H01M4/587 ,  H01M4/362 ,  H01M4/364 ,  H01M10/052

    摘要： The present invention relates to a negative electrode active material for a lithium secondary battery, a preparation method thereof, and a lithium secondary battery containing the negative electrode active material. The negative electrode active material for the lithium secondary battery according to the present invention is formed by mixing: a carbon material coated with vapor growth carbon fiber (VGCF) and amorphous graphite; and one or more kinds of other carbon material selected from natural graphite, artificial graphite, amorphous-coated graphite, resin-coated graphite and amorphous carbon. According to the present invention, when the negative electrode active material is prepared, the carbon fiber is uniformly dispersed-throughout the carbon material, and the carbon material is coated with the amorphous graphite and then mixed with other carbon materials, and thus, a high electrode density can be achieved. Accordingly, even with high electrode density, the invention can provide the negative electrode active material with excellent electrochemical properties such as charge/discharge efficiency and cycle characteristics.

    摘要翻译： 本发明涉及一种负极活性物质的锂二次电池，其制备方法，以及含有该负极活性物质的锂二次电池。 用于锂二次电池gemäß到本发明的负极活性材料通过混合而形成：涂布有气相生长碳纤维（VGCF）和非晶质石墨的碳材料; 和其他的碳材料的一种或多种选自天然石墨，人造石墨，非晶质被覆石墨，树脂被覆石墨和无定形碳中选择。 。根据本发明，当制备负电极活性材料，碳纤维均匀地分散，在整个碳材料，并且该碳材料涂覆有非晶质石墨，然后与其他碳材料混合，因此，高 电极密度就可以实现。 如充电/放电效率和循环特性：因此，即使以高电极密度，本发明能够具有优良的电化学性能提供负电极活性材料。

    COMPOSITE GRAPHITE PARTICLES AND LITHIUM SECONDARY BATTERY USING THE SAME
    3.
    发明公开
    COMPOSITE GRAPHITE PARTICLES AND LITHIUM SECONDARY BATTERY USING THE SAME 审中-公开
    GRAPHITVERBUNDTEILCHEN UND LITHIUM-SEKUNDÄRBATTERIEDAMIT

    公开(公告)号：EP2403802A1

    公开(公告)日：2012-01-11

    申请号：EP09841126.7

    申请日：2009-03-02

    申请人： Showa Denko K.K. ,  LS Mtron, Ltd.

    发明人： SOTOWA, Chiaki ,  SUDOH, Akinori ,  TAKEUCHI, Masataka ,  HAN, Kyung-hee ,  HAN-Jung-min ,  OH, Jung-hun

    IPC分类号： C01B31/04

    CPC分类号： H01M4/587 ,  C01B32/20 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/052

    摘要： The present invention provides composite graphite particles, which are useful for a negative electrode in a secondary battery having high capacitance, good charge- discharge characteristics and good charge-discharge cycle characteristics; and a paste for negative electrode, a negative electrode and a lithium secondary battery which use the composite graphite particles. The composite graphite particles of the present invention comprises a core material consisting of graphite having a interlayer distance d(002) of 0.337 nm or less in which the intensity ratio I
    D /I
    G (R value) between the peak intensity (I
    D ) in a range of 1300 to 1400 cm
    -1 and the peak intensity ( I
    G ) in a range of 1580 to 1620 cm
    -1 as measured by Raman spectroscopy spectra is from 0.01 to 0.1 and a carbonaceous surface layer in which the intensity ratio I
    D /I
    G (R value) between the peak intensity (I
    D ) in a range of 1300 to 1400 cm
    -1 and the peak intensity ( I
    G ) in a range of 1580 to 1620 cm
    -1 as measured by Raman scattering spectroscopy is 0.2 or higher; wherein the peak intensity ratio I
    110 /I
    004 between the peak intensity (I
    004 ) of face (110) and the peak intensity (I
    004 ) of face (004) obtained by XRD measurement on the graphite crystal is 0.2 or higher when the particles are mixed with a binder and pressure-molded to a density of 1.55 to 1.65 g/cm
    3 .

    摘要翻译： 本发明提供了复合石墨粒子，其对具有高电容，良好的充放电特性和良好的充放电循环特性的二次电池中的负极是有用的; 以及使用该复合石墨粒子的负极，负极和锂二次电池用糊料。 本发明的复合石墨粒子包括由层间距离d（002）为0.337nm以下的石墨构成的芯材，其中峰强度（ID）在一定范围内的强度比ID / IG（R值） 为1300〜1400cm -1，通过拉曼光谱测定的1580〜1620cm -1范围内的峰强度（IG）为0.01〜0.1，强度比ID / IG（R 通过拉曼散射光谱法测定的在1300〜1400cm -1范围内的峰强度（ID）与1580〜1620cm -1范围内的峰强度（IG）之差为0.2以上; 其中，当将颗粒与石墨晶体的XRD测量获得的面（110）的峰强度（I110）和面（004）的峰强度（I004）之间的峰强度比I110 / I004与 粘合剂，并以1.55-1.65g / cm3的密度加压成型。