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    Negative electrode active material for nonaqueous electrolyte secondary batteries and nonaqueous electrolyte secondary battery
    7.
    发明授权
    Negative electrode active material for nonaqueous electrolyte secondary batteries and nonaqueous electrolyte secondary battery 有权

    公开(公告)号：US10205165B2

    公开(公告)日：2019-02-12

    申请号：US14769233

    申请日：2014-03-25

    申请人： SANYO Electric Co., Ltd.

    发明人： Kouhei Tuduki ,  Fukui Atsushi ,  Taizou Sunano

    IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M10/0525

    摘要： The invention provides a nonaqueous electrolyte secondary battery having a large battery capacity and excellent charge/discharge cycle characteristics. The nonaqueous electrolyte secondary battery includes a negative electrode including a particulate negative electrode active material (33), a positive electrode and a nonaqueous electrolyte. The particulate negative electrode active material (33) includes a plurality of two-phase regions (34) in the particle wherein the two-phase regions include a first phase (A) containing silicon and a second phase (B) containing silicon oxide disposed on the periphery of the first phase, the negative electrode active material being such that the ratio of the intensity at 480 cm−1 wavelength to the intensity at 510 cm−1 wavelength in a Raman spectrum obtained by Raman spectroscopy is not more than 0.1 and the ratio of the intensity at 2θ=21.6 to the intensity at 2θ=28.4 in an X-ray diffraction pattern obtained by X-ray diffractometry is not more than 0.1.

    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    10.
    发明申请
    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 有权
    非电解电解质二次电池

    公开(公告)号：US20150364764A1

    公开(公告)日：2015-12-17

    申请号：US14761740

    申请日：2014-02-10

    申请人： SANYO ELECTRIC CO., LTD.

    发明人： Kei Kobayashi ,  Tatsuki Hiraoka ,  Masahiro Shiraga ,  Taizou Sunano

    IPC分类号： H01M4/62 ,  H01M10/052 ,  H01M4/36

    CPC分类号： H01M4/62 ,  H01M4/13 ,  H01M4/366 ,  H01M10/052 ,  H01M2004/027

    摘要： The initial charge/discharge efficiency and cycle characteristics of a nonaqueous electrolyte secondary battery are improved. Provided is a nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode, a porous layer placed on the negative electrode, a separator, and a nonaqueous electrolyte. The porous layer has flat voids. The minor axis direction of each flat void is perpendicular to the plane direction of the porous layer and the major axis direction of the flat void is parallel to the plane direction of the porous layer. The ratio of the major axis to the minor axis of the flat void preferably ranges from 1.4 to 2.2.

    摘要翻译： 提高了非水电解质二次电池的初始充放电效率和循环特性。 提供一种非水电解质二次电池，其包括正极，负极，负极上放置的多孔层，隔膜和非水电解质。 多孔层具有平坦的空隙。 每个平坦空隙的短轴方向垂直于多孔层的平面方向，平坦空隙的长轴方向平行于多孔层的平面方向。 平坦空隙的长轴与短轴的比值优选为1.4〜2.2。