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    Very long cycling of lithium ion batteries with lithium rich cathode materials
    61.
    发明授权
    Very long cycling of lithium ion batteries with lithium rich cathode materials 有权
    锂离子电池与锂富锂阴极材料循环很长

    公开(公告)号：US08928286B2

    公开(公告)日：2015-01-06

    申请号：US13213756

    申请日：2011-08-19

    申请人： Shabab Amiruddin ,  Bing Li ,  Sujeet Kumar

    发明人： Shabab Amiruddin ,  Bing Li ,  Sujeet Kumar

    IPC分类号： H01M10/44 ,  H01M10/46 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/36 ,  H01M10/0567

    CPC分类号： H01M10/0525 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0567 ,  H01M10/44 ,  Y02E60/122 ,  Y02T10/7011

    摘要： Lithium ion batteries can be activated and then cycled to exploit a moderate fraction of the discharge cycling capacity such that the discharge capacity and average discharge voltage stay within initial values for thousands of cycles. The superior cycling performance has been achieved at relatively high discharge rates and for practical battery formats. Lithium ion battery performance can also be achieved with superior cycling performance with partially activated batteries such that good discharge capacities can be exploited for many thousands of cycles before the discharge capacity and average discharge voltage drops more than 20% from initial values. The positive electrode active material can be a lithium rich metal oxide. The activation of the battery can comprise phase changes of the active materials. As described herein, the phase changes can be manipulated to exploit a reasonable fraction of the available high capacity of the material while providing outstanding cycling stability.

    摘要翻译： 锂离子电池可以被激活，然后循环以利用放电循环能力的中等部分，使得放电容量和平均放电电压保持在数千个周期的初始值内。 在相对较高的放电率和实际的电池格式下，已经实现了优越的循环性能。 锂离子电池的性能也可以通过部分活化的电池实现优异的循环性能，从而在放电容量和平均放电电压从初始值下降超过20％之前可以利用良好的放电容量达数千个循环。 正极活性物质可以是富锂金属氧化物。 电池的激活可以包括活性材料的相变。 如本文所述，可以操纵相位变化以利用材料的可用高容量的合理分数，同时提供优异的循环稳定性。

    LITHIUM ION BATTERIES WITH LONG CYCLING PERFORMANCE
    67.
    发明申请
    LITHIUM ION BATTERIES WITH LONG CYCLING PERFORMANCE 审中-公开
    具有长循环性能的锂离子电池

    公开(公告)号：US20110017528A1

    公开(公告)日：2011-01-27

    申请号：US12509131

    申请日：2009-07-24

    申请人： Sujeet Kumar ,  James P. Buckley ,  Hang Shi

    发明人： Sujeet Kumar ,  James P. Buckley ,  Hang Shi

    IPC分类号： B60K1/04 ,  H01M4/58 ,  H01M2/02

    CPC分类号： H01M10/0525 ,  C01G53/50 ,  C01P2002/50 ,  C01P2002/72 ,  C01P2006/40 ,  H01M2/0217 ,  H01M2/022 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/582 ,  H01M4/587 ,  Y02E60/122 ,  Y02T10/7011

    摘要： Batteries with high energy and high capacity are described that have a long cycle life upon cycling at a moderate discharge rate. Specifically, the batteries may have a room temperature fifth cycle discharge specific energy of at least about 175 Wh/kg discharged at a C/3 discharge rate from 4.2V to 2.5V. Additionally, the batteries can maintain at least about 70% discharge capacity at 1000 cycles relative to the fifth cycle, with the battery being discharged from 4.2V to 2.5V at a C/2 rate from the fifth cycle through the 1000th cycle. In some embodiment, the positive electrode of the battery comprises a lithium intercalation composition with optional metal fluoride coating. Stabilizing additive maybe added to the electrolyte of the battery to further improve the battery performance. The batteries are particularly suitable for use in electric vehicles.

    摘要翻译： 描述了具有高能量和高容量的电池，其以适度的放电速率循环时具有长的循环寿命。 具体地说，电池可以具有至少约175Wh / kg的室温第五循环放电比能量，以4.2V至2.5V的C / 3放电率放电。 此外，相对于第五周期，电池可以在1000个周期内保持至少约70％的放电容量，其中电池以从第五周期到第1000周期的C / 2速率从4.2V放电至2.5V。 在一些实施方案中，电池的正极包括具有任选的金属氟化物涂层的锂嵌入组合物。 稳定添加剂可以添加到电池的电解质中，以进一步提高电池性能。 电池特别适用于电动车辆。