NEGATIVE ELECTRODE MATERIAL, MAKING METHOD, LITHIUM ION SECONDARY BATTERY, AND ELECTROCHEMICAL CAPACITOR
    2.
    发明申请
    NEGATIVE ELECTRODE MATERIAL, MAKING METHOD, LITHIUM ION SECONDARY BATTERY, AND ELECTROCHEMICAL CAPACITOR 审中-公开
    负极电极材料,制造方法,锂离子二次电池和电化学电容器

    公开(公告)号:US20090311606A1

    公开(公告)日:2009-12-17

    申请号:US12484898

    申请日:2009-06-15

    IPC分类号: H01M4/58 H01G9/04

    摘要: A conductive powder is provided in which particles having silicon crystallites dispersed in a silicon compound are coated on their surface with carbon. The conductive powder develops a diffraction peak assigned to Si(111) around 2θ=28.4° on x-ray diffractometry (Cu—Kα) using copper as the counter cathode, the peak having a half width of at least 1.0°, and has a specific resistance of up to 50 mΩ. The powder is used as a negative electrode material to construct a non-aqueous electrolyte secondary battery, which has a high charge/discharge capacity and improved cycle performance.

    摘要翻译: 提供了一种导电粉末,其中具有分散在硅化合物中的硅微晶的颗粒在其表面上涂覆有碳。 使用铜作为对阴极,导电粉末在x射线衍射(Cu-Kalpha)上形成分配给Si(111)约2θ= 28.4°的衍射峰,该峰具有至少1.0°的半宽度,并且具有 比电阻高达50 mOmega。 该粉末用作负极材料,以构建具有高充电/放电容量和改进的循环性能的非水电解质二次电池。