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    Lithium secondary battery
    1.
    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。

    Non-aqueous electrolyte secondary battery
    4.
    发明申请
    Non-aqueous electrolyte secondary battery 审中-公开
    非水电解质二次电池

    公开(公告)号：US20090061311A1

    公开(公告)日：2009-03-05

    申请号：US11887144

    申请日：2006-02-03

    申请人： Masaharu Itaya ,  Atsushi Fukui ,  Shouichirou Sawa ,  Yasuyuki Kusumoto ,  Masahisa Fujimoto

    发明人： Masaharu Itaya ,  Atsushi Fukui ,  Shouichirou Sawa ,  Yasuyuki Kusumoto ,  Masahisa Fujimoto

    IPC分类号： H01M4/62 ,  H01M6/04

    CPC分类号： H01M4/62 ,  H01M4/134 ,  H01M4/386 ,  H01M10/052 ,  H01M10/44 ,  H01M2004/021

    摘要： An object of the invention is to provide a non-aqueous electrolyte secondary battery that allows a good charge/discharge cycle characteristic to be obtained. The non-aqueous electrolyte secondary battery according to the invention includes a negative electrode containing silicon as a negative electrode active material, a positive electrode, and a non-aqueous electrolyte, the average particle size of the negative electrode active material is not less than 5 μm nor more than 20 μm, and the weight of the negative electrode active material is at least 10% of the weight of the non-aqueous electrolyte.

    摘要翻译： 本发明的目的是提供一种能够获得充分/放电循环特性良好的非水电解质二次电池。 根据本发明的非水电解质二次电池包括含有硅作为负极活性物质的负极，正极和非水电解质，负极活性物质的平均粒径不小于5 妈妈也不超过20个，负极活性物质的重量为非水电解质重量的至少10重量％。

    Lithium secondary battery and method for manufacturing the same
    5.
    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
    7.
    发明申请
    Lithium secondary battery 审中-公开
    锂二次电池

    公开(公告)号：US20070054190A1

    公开(公告)日：2007-03-08

    申请号：US11516523

    申请日：2006-09-07

    申请人： Atsushi Fukui ,  Hiroshi Minami ,  Yasuyuki Kusumoto

    发明人： Atsushi Fukui ,  Hiroshi Minami ,  Yasuyuki Kusumoto

    IPC分类号： H01M4/58 ,  H01M4/62

    CPC分类号： H01M4/1395 ,  H01M4/02 ,  H01M4/0471 ,  H01M4/38 ,  H01M4/386 ,  H01M4/622 ,  H01M4/625 ,  H01M10/446 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2010/4292

    摘要： A lithium secondary battery has a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode has a negative electrode current collector and a negative electrode mixture layer containing a negative electrode conductive agent, a negative electrode binder, and negative electrode active material particles made of a material containing silicon. The negative electrode mixture layer is sintered and disposed on the negative electrode current collector. The negative electrode active material particles have an average particle size of from 5.0-15.0 μm before being charged. The negative electrode conductive agent is made of a graphite material having an average particle size of from 2.5-15.0 μm. The amount of the graphite material added is from 3-20 mass % with respect to the negative electrode active material. The theoretical electrical capacity ratio of the positive electrode to the negative electrode is 1.0 or less.

    摘要翻译： 锂二次电池具有正极，负极和非水电解质。 负极具有含有负极导电剂，负极粘合剂和由含硅材料制成的负极活性物质粒子的负极集电体和负极合剂层。 将负极复合层烧结并设置在负极集电体上。 负极活性物质粒子在充电前的平均粒径为5.0〜15.0μm。 负极导电剂由平均粒径为2.5〜15.0μm的石墨材料制成。 石墨材料的添加量相对于负极活性物质为3-20质量％。 正极与负极的理论电容比为1.0以下。

    Negative electrode for lithium secondary cell and lithium secondary cell
    8.
    发明授权
    Negative electrode for lithium secondary cell and lithium secondary cell 有权
    锂二次电池和锂二次电池用负极

    公开(公告)号：US08216720B2

    公开(公告)日：2012-07-10

    申请号：US10519073

    申请日：2003-06-25

    申请人： Atsushi Fukui ,  Yasuyuki Kusumoto ,  Mariko Torimae ,  Hiroshi Nakamura

    发明人： Atsushi Fukui ,  Yasuyuki Kusumoto ,  Mariko Torimae ,  Hiroshi Nakamura

    IPC分类号： H01M4/13 ,  H01M4/88

    CPC分类号： H01M4/134 ,  H01M4/386 ,  H01M4/405 ,  H01M4/621 ,  H01M4/661 ,  H01M10/052

    摘要： A negative electrode for a lithium secondary cell having a collector composed of an electroconductive metal foil and, provided on the surface thereof, an active material layer containing active material particles containing silicon and/or a silicon alloy and a binder, characterized in that the binder has mechanical characteristics of a tensile strength of 50 N/mm2 or more, an elongation at break of 10% or more, a strain energy density of 2.5×10−3 J/mm3 or more and a coefficient of elasticity of 10000 N/mm2 or less, and preferably characterized in that the collector has mechanical characteristics of a tensile strength of 80 N/mm2 or more, a proportional limit 30 N/mm2 or more, an elongation at break of 1.0% or more and an elastic elongation limit of 0.03% or more.

    摘要翻译： 一种锂二次电池用负极，其具有由导电性金属箔构成的集电体，在其表面上设有包含含有硅和/或硅合金的活性物质粒子和粘合剂的活性物质层，其特征在于，所述粘合剂 拉伸强度为50N / mm 2以上，断裂伸长率为10％以上，应变能​​密度为2.5×10 -3 J / mm 3以上，弹性系数为10000N / mm 2的机械特性 其特征在于，集电体的拉伸强度为80N / mm 2以上，比例范围为30N / mm 2以上，断裂伸长率为1.0％以上，弹性伸长极限为 0.03％以上。

    Lithium secondary battery and method of manufacturing the same
    10.
    发明授权
    Lithium secondary battery and method of manufacturing the same 有权
    锂二次电池及其制造方法

    公开(公告)号：US09263771B2

    公开(公告)日：2016-02-16

    申请号：US12295182

    申请日：2007-03-28

    申请人： Atsushi Fukui ,  Hiroshi Minami ,  Yasuyuki Kusumoto

    发明人： Atsushi Fukui ,  Hiroshi Minami ,  Yasuyuki Kusumoto

    IPC分类号： H01M4/38 ,  H01M4/58 ,  H01M4/48 ,  H01M10/0587 ,  H01M4/134 ,  H01M4/02

    CPC分类号： H01M10/0587 ,  H01M4/134 ,  H01M2004/021 ,  Y02E60/122 ,  Y02P70/54 ,  Y10T29/49115

    摘要： [Problem] An object of the invention is to provide a lithium secondary battery that shows good cycle performance and at the same time prevents a battery thickness increase due to charge-discharge cycles, and a method of manufacturing such a battery.[Means for Solving the Problem] A lithium secondary battery includes a negative electrode (2) having a negative electrode current collector (11) and a negative electrode active material layer (12) disposed on the negative electrode current collector (11), a positive electrode (1) having a positive electrode active material, a separator (3), and a non-aqueous electrolyte. The negative electrode active material layer includes negative electrode active material particles and a negative electrode binder, and the negative electrode active material particles include silicon particles and/or silicon alloy particles. The silicon particles and the silicon alloy particles have a crystallite size of 100 nm or less.

    摘要翻译： 发明内容本发明的目的是提供一种显示良好的循环性能并同时防止由于充放电循环引起的电池厚度增加的锂二次电池及其制造方法。 解决问题的手段锂二次电池包括具有负极集电体（11）的负极（2）和设置在负极集电体（11）上的负极活性物质层（12），正极 具有正极活性物质的电极（1），隔膜（3）和非水电解质。 负极活性物质层包括负极活性物质粒子和负极粘合剂，负极活性物质粒子包含硅粒子和/或硅合金粒子。 硅颗粒和硅合金颗粒的微晶尺寸为100nm以下。