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    COMPOSITE GRAPHITE PARTICLES AND LITHIUM SECONDARY BATTERY USING THE SAME
    13.
    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。