Negative electrode for rechargeable battery
    8.
    发明授权
    Negative electrode for rechargeable battery 有权
    可充电电池负极

    公开(公告)号:US06777134B2

    公开(公告)日:2004-08-17

    申请号:US10208962

    申请日:2002-07-31

    IPC分类号: H01M458

    摘要: A negative electrode for a rechargeable battery including: a current collector, a first layer containing a conductive material to occlude and release lithium ion, the first layer formed on the current collector, a second layer containing a metal selected from lithium and lithium alloy, the second layer formed on the first layer, and a third layer containing a lithium ion conductive material, the third layer formed on the second layer. The third layer prevents the lithium and/or the lithium alloy in the second layer from being in contact with the electrolyte and smoothly feeds the lithium to the second layer to improve the efficiency of the negative electrode. The first layer can occlude and release the part of the lithium to be occluded and released, thereby reducing the volume change of the second layer. Such a structure of the negative electrode enables us to enhance cycling efficiency, and to attain long cycle life and good safety.

    摘要翻译: 一种用于可再充电电池的负极,包括:集电器,包含用于封闭和释放锂离子的导电材料的第一层,形成在集电器上的第一层,含有选自锂和锂合金的金属的第二层, 第二层形成在第一层上,第三层包含锂离子传导材料,第三层形成在第二层上。 第三层防止第二层中的锂和/或锂合金与电解质接触,并平稳地将锂馈送到第二层以提高负极的效率。 第一层可以封闭和释放待封闭和释放的锂的部分,从而减少第二层的体积变化。 负极的这种结构使得我们能够提高循环效率,并且获得长的循环寿命和良好的安全性。