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    • 81. 发明专利
    • Lithium secondary battery
    • 锂二次电池
    • JP2005190772A
    • 2005-07-14
    • JP2003429085
    • 2003-12-25
    • Sanyo Electric Co Ltd三洋電機株式会社
    • SATO KAZUYUKITAMURA NOBUYUKIJINNO MARUO
    • H01M4/134H01M4/38H01M10/05H01M10/052H01M10/058H01M10/40H01M4/02
    • Y02E60/122
    • PROBLEM TO BE SOLVED: To provide a lithium secondary battery capable of suppressing an increase of its depth as it is charged and discharged while suppressing the deterioration of charge and discharge characteristics.
      SOLUTION: This lithium secondary battery is equipped with a positive electrode 3 wherein a positive electrode active material layer 3b is formed in a prescribed region, and a negative electrode a1 provided so as to face the positive electrode 3. The negative electrode a1 includes a negative electrode collector 1a, a negative electrode active material layer 1b which is formed on the surface of the negative electrode collector 1a at least facing the positive electrode 3 and which expands by being alloyed with lithium when charging, and a cut portion 1g provided on the non-facing region 1d other than the facing region 1c facing the positive electrode active material layer 3b of the negative electrode collector 1a and the negative electrode active material layer 1b.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 解决的问题:提供一种能够抑制充放电时的深度增加的锂二次电池,同时抑制充放电特性的劣化。 解决方案:该锂二次电池配备有正电极3,其中正电极活性材料层3b形成在规定区域中,负极a1设置为与正电极3相对。负极a1 包括负极集电体1a,负极活性物质层1b,其在负极集电体1a的至少面对正极3的表面上形成,并且在充电时通过与锂合金而膨胀,并且设置有切口部1g 除了面对负极集电体1a的正极活性物质层3b和负极活性物质层1b的面对区域1c以外的非面对区域1d。 版权所有(C)2005,JPO&NCIPI
    • 82. 发明专利
    • Lithium secondary battery
    • 锂二次电池
    • JP2005150038A
    • 2005-06-09
    • JP2003389845
    • 2003-11-19
    • Sanyo Electric Co Ltd三洋電機株式会社
    • YOSHIDA TOMOKAZUHOKOTANI NOBUHIROJINNO MARUOTARUI HISAKI
    • H01M4/134H01M4/38H01M4/64H01M10/05H01M10/052H01M10/42H01M4/02H01M10/40
    • H01M10/052H01M4/131H01M4/134H01M4/1391H01M4/1395H01M4/386H01M4/525H01M2004/021H01M2010/4292
    • PROBLEM TO BE SOLVED: To improve charging/discharging cycle characteristics in a lithium secondary battery using a material occluding lithium by alloying with lithium as a negative electrode active material.
      SOLUTION: This lithium secondary battery is provided with a negative electrode 3 in which a thin film 3a of the negative electrode active material is formed on a negative electrode current collector 3b, a positive electrode 1 containing the positive active material 1a, and a nonaqueous electrolyte. The negative electrode active material 3a is a material which occludes lithium by alloying with lithium. The ratio of the discharge capacity per unit area of the negative electrode 3 to the discharge capacity per unit area of the positive electrode 1 is 1.5 to 3. The ratio of the thickness of the negative electrode active material 3a to arithmetic mean roughness Ra of a surface of the negative electrode current collector 3b is 50 or less.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 解决的问题:通过与锂合金化作为负极活性物质,通过使用锂吸留材料来提高锂二次电池的充放电循环特性。 解决方案:该锂二次电池设置有负极3,其负极活性物质的薄膜3a形成在负极集电体3b上,正极1包含正极活性物质1a,以及 非水电解质。 负极活性物质3a是通过与锂合金而吸留锂的材料。 负极3的每单位面积的放电容量与正极1的每单位面积的放电容量的比例为1.5〜3。负极活性物质3a的厚度与算术平均粗糙度Ra的比率 负极集电体3b的表面为50以下。 版权所有(C)2005,JPO&NCIPI