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    • 3. 发明申请
    • NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND FABRICATION METHOD THEREOF, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    • 非水电解质二次电池用负极及其制造方法及非水电解质二次电池
    • US20110135982A1
    • 2011-06-09
    • US13058791
    • 2010-06-29
    • Yoshiyuki MuraokaMasaya UgajiShinji Kasamatsu
    • Yoshiyuki MuraokaMasaya UgajiShinji Kasamatsu
    • H01M4/13H01M4/62F27D7/00H01M10/36H01M10/04
    • H01M10/0587H01M4/139H01M4/36H01M4/366H01M4/621H01M4/622H01M10/052Y02T10/7011Y10T29/49108Y10T29/49115
    • A negative electrode, whose tensile strength is 15 N/cm or lower when the percentage elongation in the longitudinal direction is 1%, is used in a non-aqueous electrolyte secondary battery including: a flat electrode group 10 including a positive electrode, the negative electrode and a separator; and a non-aqueous electrolyte, which are housed in a prismatic battery case. This negative electrode includes a negative electrode current collector and a negative electrode active material layer which includes: (1) a negative electrode active material which expands and contracts by absorbing and desorbing lithium ions; (2) a rubber binder whose thermal decomposition temperature is equal to or higher than the softening temperature of the negative electrode current collector; (3) a water-soluble polymer A whose thermal decomposition temperature is equal to or higher than the softening temperature of the negative electrode current collector; and (4) a water-soluble polymer B whose thermal decomposition temperature is equal to or higher than the softening temperature of the negative electrode current collector and whose degree of swelling relative to the non-aqueous electrolyte is lower than that of the water-soluble polymer A. Formed on the surface of the negative electrode active material is a coating layer including the water-soluble polymer A.
    • 在非水电解质二次电池中使用长径方向伸长率为1%时的拉伸强度为15N / cm以下的负极,该非水电解质二次电池包括:具有正极的负极组10,负极 电极和分离器; 和非水电解质,其被容纳在棱柱形电池壳体中。 该负极包括负极集电体和负极活性物质层,其包括:(1)通过吸收和解吸锂离子而膨胀和收缩的负极活性物质; (2)热分解温度等于或高于负极集电体的软化温度的橡胶粘合剂; (3)热分解温度为负极集电体的软化温度以上的水溶性聚合物A, 和(4)热分解温度等于或高于负极集电体的软化温度并且相对于非水电解质的溶胀度低于水溶性聚合物B的水溶性聚合物B 聚合物A.形成在负极活性物质的表面上的是包含水溶性聚合物A的涂层。
    • 9. 发明申请
    • NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY FABRICATING METHOD
    • 非电解电解质二次电池和非电解电解质二次电池制作方法
    • US20110287288A1
    • 2011-11-24
    • US12525643
    • 2009-02-02
    • Yasuhiko HinaYoshiyuki Muraoka
    • Yasuhiko HinaYoshiyuki Muraoka
    • H01M4/70H01M10/05H01M4/04H01M4/66
    • H01M10/0587H01M2/1673H01M4/0404H01M4/1391H01M4/625H01M4/661H01M10/052H01M2004/021H01M2004/028H01M2010/4292Y02T10/7011
    • A nonaqueous electrolyte secondary battery includes an electrode group (8) including a positive electrode (4) in which a positive electrode material mixture layer (4B) is provided on a positive electrode current collector (4A), a negative electrode (5) in which a negative electrode material mixture layer (5B) is provided on a negative electrode current collector (5A), and a porous insulating film (6). The positive electrode (4) and the negative electrode (5) are wound with the porous insulating layer (6) interposed. The positive electrode material mixture layer (4B) is provided on at least one of opposite surfaces of the positive electrode current collector (4A) located inside in a radial direction of the electrode group (8). The positive electrode material mixture layer (4B) has a porosity of 20% or lower. Where η is a thickness of the positive electrode material mixture layer (4B) provided on the surface located inside in the radial direction of the electrode group (8) of the surfaces of the positive electrode current collector (4A), ρ is a minimum radius of curvature of the positive electrode (4), and ε is a tensile extension in a winding direction of the positive electrode (4), ε≧η/ρ is satisfied.
    • 非水电解质二次电池包括在正极集电体(4A)上设置有正极复合层(4B)的正极(4)的电极组(8),负极(5) 在负极集电体(5A)和多孔绝缘膜(6)上设置负极复合层(5B)。 将正极(4)和负极(5)夹在多孔绝缘层(6)上。 正电极复合层(4B)设置在位于电极组(8)的径向内侧的正极集电体(4A)的至少一个相对面上。 正极合剂层(4B)的孔隙率为20%以下。 何处 是设置在正极集电体(4A)的表面的电极组(8)的径向内侧的表面上的正极复合材料层(4B)的厚度。 是正电极(4)的最小曲率半径,&egr; 是正极(4)的卷绕方向的拉伸伸长率,& 满意
    • 10. 发明申请
    • ELECTRODE, SECONDARY BATTERY, AND FABRICATION METHOD OF SECONDARY BATTERY
    • 电极,二次电池和二次电池的制造方法
    • US20110223456A1
    • 2011-09-15
    • US13123866
    • 2010-08-30
    • Junichi SugayaYoshiyuki Muraoka
    • Junichi SugayaYoshiyuki Muraoka
    • H01M10/36H01M4/139H01M10/0587
    • H01M10/0587H01M4/13H01M4/139H01M4/621H01M10/0525Y10T29/49108Y10T29/49115
    • Disclosed is an electrode used in a wound electrode assembly, the electrode including: a current collector; a first material mixture layer including a first active material, which is formed on one surface of the current collector; and a second material mixture layer including a second active material, which is formed on the other surface of the current collector. When an electrode assembly is assembled, the first material mixture layer is wound in a manner such that it is positioned on the outer side of the second material mixture layer. In a part corresponding to a predetermined region of a cross section of said electrode assembly perpendicular to the winding axis thereof, the radius of curvature of the predetermined region being 3.0×10−3 m or less, the capacity per unit volume of the first material mixture layer is higher than the capacity per unit volume of the second material mixture layer.
    • 公开了一种用于卷绕电极组件中的电极,该电极包括:集电器; 包括形成在集电体的一个表面上的第一活性物质的第一材料混合物层; 以及第二材料混合物层,其包括形成在集电体的另一个表面上的第二活性材料。 当组装电极组件时,第一混合物层以使其位于第二材料混合物层的外侧上的方式缠绕。 在对应于垂直于其卷绕轴线的所述电极组件的横截面的预定区域的部分中,预定区域的曲率半径为3.0×10 -3 m或更小,第一材料的每单位体积的容量 混合物层比第二混合物层的每单位体积的容量高。