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    Electrode for a lithium secondary battery having a thin film active material with columnar or insular structures and lithium secondary battery
    3.
    发明授权
    Electrode for a lithium secondary battery having a thin film active material with columnar or insular structures and lithium secondary battery 失效
    具有柱状或岛状结构的薄膜活性物质的锂二次电池用电极和锂二次电池

    公开(公告)号：US07592099B2

    公开(公告)日：2009-09-22

    申请号：US10878965

    申请日：2004-06-29

    申请人： Noriyuki Tamura ,  Yoshio Kato ,  Shigeki Matsuta ,  Maruo Kamino

    发明人： Noriyuki Tamura ,  Yoshio Kato ,  Shigeki Matsuta ,  Maruo Kamino

    IPC分类号： H01M4/58 ,  H01M4/66

    CPC分类号： H01M4/70 ,  H01M4/0438 ,  H01M4/0445 ,  H01M4/0452 ,  H01M4/134 ,  H01M4/362 ,  H01M4/387 ,  H01M4/40 ,  H01M4/405 ,  H01M4/661 ,  H01M10/052

    摘要： An electrode for a lithium secondary battery includes a thin film of an active material having a first phase that reacts with Li dominantly and a second phase that reacts less readily with Li than the first phase and exists at least before initial-cycle charging and after discharging in each cycle following the initial cycle. A surface of the current collector has an arithmetical mean roughness Ra of 0.1 μm or greater. A surface of the thin film has irregularities formed corresponding to the irregularities of the current collector surface. By the charging and discharging in the initial cycle and thereafter, gaps form along the thin-film thickness on lines connecting valleys in the thin-film surface irregularities and valleys in the current-collector surface irregularities, and the thin film is divided into columnar or insular structures by the gaps.

    摘要翻译： 用于锂二次电池的电极包括具有与Li主要反应的第一相的活性材料的薄膜和与第一相不太容易与Li反应的第二相，并且至少在初始循环充电之前和放电后存在 在初始周期后的每个周期。 集电体的表面的算术平均粗糙度Ra为0.1μm以上。 薄膜的表面具有对应于集电体表面的凹凸形成的凹凸。 通过在初始循环中的充放电，此后，在与集电体表面凹凸不平的薄膜表面凹凸和谷中的谷连接的线上沿着薄膜厚度形成间隙，并将薄膜分为柱状或 岛屿上的空隙结构。