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    • 6. 发明申请
    • ELECTRODE FOR LITHIUM ION SECONDARY BATTERY
    • 用于锂离子二次电池的电极
    • US20090104529A1
    • 2009-04-23
    • US11916603
    • 2006-07-21
    • Hajime NishinoShuji TsutsumiShinji KasamatsuHideharu TakezawaMikinari Shimada
    • Hajime NishinoShuji TsutsumiShinji KasamatsuHideharu TakezawaMikinari Shimada
    • H01M4/58
    • H01M4/70H01M10/0525Y02E60/122Y02T10/7011
    • An object of the present invention is to provide an electrode for a lithium ion secondary battery that can ensure a high level of safety even when exposed to severe conditions such as a nail penetration test or crush test, and exhibit excellent output characteristics.The present invention relates to an electrode for a lithium ion secondary battery having a material mixture containing active material particles capable of reversibly absorbing and desorbing lithium, and a current collector that carries the material mixture, wherein a surface of the current collector has recessed portions, and an area occupied by the recessed portions accounts for not less than 30% of an a material mixture carrying area of the current collector. The present invention further relates to an electrode for a lithium ion secondary battery wherein, in a cut surface obtained by simultaneously cutting a material mixture and a current collector vertically to an electrode plane, the maximum depth of recessed portions is not less than 1 μm, or a difference between an average thickness of a current collector and a maximum thickness of the current collector is not less than 0.35 μm.
    • 本发明的目的是提供一种锂离子二次电池用电极,即使在暴露于诸如指甲穿透试验或粉碎试验等严酷条件下也能够确保高水平的安全性,并且显示出优异的输出特性。 本发明涉及一种锂离子二次电池用电极,其具有包含能够可逆地吸收和解吸锂的活性物质粒子的材料混合物,以及承载该材料混合物的集电体,其中集电体的表面具有凹部, 并且由凹部占据的面积占集电体的混合物承载面积的30%以上。 本发明还涉及一种锂离子二次电池用电极,其特征在于,在与电极平面垂直地同时切割材料混合物和集电体的切断面中,凹部的最大深度为1μm以上, 或者集电体的平均厚度与集电体的最大厚度的差为0.35μm以上。