公开(公告)号：EP2365566A1

公开(公告)日：2011-09-14

申请号：EP11164912.5

申请日：2009-08-04

申请人： SION POWER CORPORATION

发明人： Scordilis-Kelley, Chariclea ,  Affinito, John, D. ,  Jones, Lowell, D. ,  Mikhaylik, Yuriy, V. ,  Kovalev, Igor ,  Wilkening, William, F. ,  Campbell, Christopher, T. S. ,  Martens, John, A.

IPC分类号： H01M4/58 ,  H01M10/052 ,  H01M10/058

CPC分类号： H01M10/052 ,  H01M4/13 ,  H01M4/133 ,  H01M4/136 ,  H01M4/40 ,  H01M4/581 ,  H01M4/587 ,  H01M10/0468 ,  H01M10/0481 ,  H01M10/0525 ,  H01M10/058 ,  Y02E60/122

摘要： The present invention relates to the application of a force to enhance the performance of an electrochemical cell. The force may comprise, in some instances, an anisotropic force with a component normal to an active surface of the anode of the electrochemical cell. In the embodiments described herein, the electrochemical cells (e.g., rechargeable batteries) may undergo a charge/discharge cycle involving deposition of metal (e.g., lithium metal) on a surface of the anode upon charging and reaction of the metal on the anode surface, wherein the metal diffuses from the anode surface, upon discharging. The uniformity with which the metal is deposited on the anode may affect cell performance. For example, when lithium metal is redeposited on an anode, it may, in some cases, deposit unevenly forming a rough surface. The roughened surface may increase the amount of lithium metal available for undesired chemical reactions which may result in decreased cycling lifetime and/or poor cell performance. The application of force to the electrochemical cell has been found, in accordance with the invention, to reduce such behaviour and to improve the cycling lifetime and/or performance of the cell.

摘要翻译： 本发明涉及一种用于增强电化学电池性能的力的应用。 在一些情况下，力可以包括垂直于电化学电池的阳极的活性表面的成分的各向异性力。 在本文所述的实施例中，电化学电池（例如，可再充电电池）可以进行充电/放电循环，该充电/放电循环包括在金属在阳极表面上充电和反应时在金属表面上沉积金属（例如锂金属） 其中所述金属在放电时从阳极表面扩散。 金属沉积在阳极上的均匀性可能影响电池性能。 例如，当锂金属重新沉积在阳极上时，在某些情况下，可能不均匀地沉积形成粗糙表面。 粗糙表面可能增加可用于不期望的化学反应的锂金属的量，这可能导致循环寿命降低和/或不良的电池性能。 已经发现根据本发明，向电化学电池施加力以减少这种行为并改善电池的循环寿命和/或性能。