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    LITHIUM TITANATE OXIDE AS NEGATIVE ELECTRODE IN LI-ION CELLS
    1.
    发明公开
    LITHIUM TITANATE OXIDE AS NEGATIVE ELECTRODE IN LI-ION CELLS 审中-公开
    李EN EN EN EN EN EN EN EN EN EN EN EN EN

    公开(公告)号：EP2945211A3

    公开(公告)日：2016-02-24

    申请号：EP15167423.1

    申请日：2015-05-12

    申请人： Saft Groupe S.A.

    发明人： Chen, Yee Yvonne ,  Greszler, Thomas ,  Deveney, Bridget

    IPC分类号： H01M4/485 ,  H01M4/36 ,  H01M4/1391 ,  H01M4/131 ,  H01M4/04 ,  H01M10/0567 ,  H01M10/0525

    CPC分类号： H01M4/485 ,  H01M4/0447 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/058 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0025 ,  Y10T29/4911

    摘要： A lithium-ion battery including a negative electrode (anode) containing lithium titanate oxide (Li 4 Ti 5 O 12 ) (LTO) as an active material and a stable interface layer disposed on a surface of the electrode; a positive electrode (cathode); an electrolyte containing a solvent and an impedance growth reducing additive; and a separator disposed between the electrodes. The LTO-based cell with the stable interface layer on the negative electrode is formed by holding the potential of the negative electrode below the reduction potential of the impedance growth reducing additive for a sufficient length of time during a first formation cycle. The stable interface layer on the negative electrode mitigates impedance growth on the positive electrode over cycle life. When the impedance growth reducing additive is fluoroethylene carbonate (C 3 H 3 FO 3 ), the stable interface layer includes a LiF deposit.

    摘要翻译： 一种锂离子电池，包括含有作为活性物质的钛酸锂氧化物（Li 4 Ti 5 O 12）（LTO）的负极（阳极）和设置在电极的表面上的稳定界面层; 正极（阴极）; 含有溶剂和阻抗增长减少添加剂的电解质; 以及设置在电极之间的隔膜。 通过在第一形成循环期间将负极的电位保持在阻抗增长还原添加剂的还原电位足够长的时间内，形成具有稳定界面层的基于LTO的电池。 负极上的稳定的界面层减缓了循环寿命期间正极上的阻抗增长。 当阻抗增长减少添加剂是氟代亚乙基碳酸酯（C 3 H 3 FO 3）时，稳定的界面层包括LiF沉积物。