公开(公告)号：US09324994B2

公开(公告)日：2016-04-26

申请号：US13167460

申请日：2011-06-23

申请人： Song Taek Oh ,  Sun Kyu Kim ,  Geun Chang Chung ,  Sin Kyu Kim ,  Hyun Seok Lee ,  Bong Kook Youn

发明人： Song Taek Oh ,  Sun Kyu Kim ,  Geun Chang Chung ,  Sin Kyu Kim ,  Hyun Seok Lee ,  Bong Kook Youn

IPC分类号： H01M4/13 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/62

CPC分类号： H01M4/131 ,  H01M4/0447 ,  H01M4/1391 ,  H01M4/364 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011 ,  Y10T29/49108

摘要： A high capacity lithium secondary battery includes a lithium manganese oxide having a layered structure exhibiting a great irreversible capacity in the event of overcharging at a high voltage and a spinel-based lithium manganese oxide. Because it is activated at a high voltage of 4.45 V or higher based on a positive electrode potential, additional lithium for utilizing a 3V range of the spinel-based lithium manganese oxide can be provided and an even profile in the entire SOC area can be obtained. Because the lithium secondary battery includes the mixed positive electrode active material including the spinel-based lithium manganese oxide and the lithium manganese oxide having a layered structure, and is charged at a high voltage, its stability can be improved. Also, the high capacity battery having a large available SOC area and improved stability without causing an output shortage due to a rapid voltage drop in the SOC area can be implemented.

摘要翻译： 大容量锂二次电池包括具有在高电压过充电情况下具有很大不可逆容量的层状结构的锂锰氧化物和尖晶石型锂锰氧化物。 由于在基于正电极电位的4.45V以上的高电压下被激活，所以可以提供用于利用3V范围的尖晶石型锂锰氧化物的附加锂，并且可以获得整个SOC区域的均匀分布 。 由于锂二次电池包括具有层状结构的尖晶石型锂锰氧化物和锂锰氧化物的混合正极活性物质，因此能够提高其稳定性。 此外，可以实现具有大的可用SOC面积和改善的稳定性的高容量电池，而不会由于SOC区域中的快速电压下降而导致输出不足。