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    Lithium secondary battery and method for manufacturing the same
    3.
    发明授权
    Lithium secondary battery and method for manufacturing the same 有权
    锂二次电池及其制造方法

    公开(公告)号：US08338022B2

    公开(公告)日：2012-12-25

    申请号：US11001192

    申请日：2004-12-02

    申请人： Atsushi Fukui ,  Hiroshi Minami ,  Shoichiro Sawa ,  Mariko Torimae ,  Yasuyuki Kusumoto ,  Maruo Kamino

    发明人： Atsushi Fukui ,  Hiroshi Minami ,  Shoichiro Sawa ,  Mariko Torimae ,  Yasuyuki Kusumoto ,  Maruo Kamino

    IPC分类号： H01M2/02

    CPC分类号： H01M10/052 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/134 ,  H01M4/386 ,  H01M4/525 ,  H01M4/622 ,  H01M4/661 ,  H01M4/70 ,  H01M10/0587 ,  H01M2004/021 ,  Y10T29/49108

    摘要： A lithium secondary battery of the present invention comprises a positive electrode formed by disposing a positive-electrode mixture layer containing a positive-electrode active material and a positive-electrode binder, on a surface of a positive-electrode current collector; a negative electrode formed by sintering a negative-electrode mixture layer containing a negative-electrode binder and a negative-electrode active material containing silicon and/or a silicon alloy, disposed on a surface of a negative-electrode current collector; a separator disposed between the positive electrode and the negative electrode; and a nonaqueous electrolyte; wherein an electrode unit obtained by setting the positive electrode and the negative electrode opposed to each other through the separator and rolling them in spirally rolled state is placed in a cylindrical battery container and wherein a curvature radius of the negative-electrode mixture layer opposed to the positive-electrode mixture layer through the separator in the spirally rolled state is 1.5 mm or larger.

    摘要翻译： 本发明的锂二次电池包括在正极集电体的表面上设置含有正极活性物质和正极粘合剂的正极合剂层而形成的正极， 通过在负极集电体的表面上烧结含有负极粘合剂的负极混合层和含有硅和/或硅合金的负极活性物质而形成的负极， 设置在所述正极和所述负极之间的隔膜; 和非水电解质; 其特征在于，将通过隔板相对的正极和负极通过将螺旋卷绕状态进行轧制而得到的电极单元配置在圆筒状的电池容器中，其中与负极混合层相对的曲率半径 螺旋状卷取状态的正极混合层通过隔膜的厚度为1.5mm以上。

    Lithium secondary battery
    5.
    发明申请
    Lithium secondary battery 审中-公开
    锂二次电池

    公开(公告)号：US20070202365A1

    公开(公告)日：2007-08-30

    申请号：US11709252

    申请日：2007-02-22

    申请人： Shouichirou Sawa ,  Kazuyuki Satou ,  Atsushi Fukui ,  Yasuyuki Kusumoto ,  Maruo Kamino

    发明人： Shouichirou Sawa ,  Kazuyuki Satou ,  Atsushi Fukui ,  Yasuyuki Kusumoto ,  Maruo Kamino

    IPC分类号： H01M14/00 ,  H01M4/58 ,  H01M4/62

    CPC分类号： H01M4/134 ,  H01M4/622 ,  H01M4/661 ,  H01M2004/021 ,  H01M2010/4292

    摘要： In a lithium secondary battery using negative electrode active material particles containing silicon, excellent charge-discharge characteristics are achieved and swelling of the negative electrode is minimized. A lithium secondary battery has a positive electrode containing a positive electrode active material, a negative electrode containing an active material layer and a current collector made of a conductive metal foil, and a non-aqueous electrolyte. The active material layer has a binder and active material particles containing silicon, and is formed by sintering the active material layer on a current collector surface in a non-oxidizing atmosphere. The active material particles have an average particle size of from 7.5-15 μm and a particle size distribution such that 60 volume % or more of the active material particles falls within the ±40% range of the average particle size, and the lithium secondary battery has a negative/positive electrode capacity ratio of 1.7 or greater.

    摘要翻译： 在使用含有硅的负极活性物质粒子的锂二次电池中，实现了优异的充放电特性，并使负极的膨胀最小化。 锂二次电池具有包含正极活性物质的正极，含有活性物质层的负极和由导电性金属箔构成的集电体和非水电解质。 活性物质层具有粘合剂和含有硅的活性物质颗粒，并且通过在非氧化性气氛中在集电体表面上烧结活性物质层而形成。 活性物质粒子的平均粒径为7.5〜15μm，粒径分布为60体积％以上的活性物质粒子落入平均粒径的±40％范围内，锂二次电池 负极/正极容量比为1.7以上。