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    • 57. 发明申请
    • Very Long Cycling of Lithium Ion Batteries with Lithium Rich Cathode Materials
    • 锂离子电池与锂离子电池极长循环
    • US20120056590A1
    • 2012-03-08
    • US13213756
    • 2011-08-19
    • Shabab AmiruddinBing LiSujeet Kumar
    • Shabab AmiruddinBing LiSujeet Kumar
    • H02J7/00H01M10/44H01M10/0525
    • H01M10/0525H01M4/366H01M4/505H01M4/525H01M10/0567H01M10/44Y02E60/122Y02T10/7011
    • 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.
    • 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。