公开(公告)号：EP2980892A4

公开(公告)日：2016-11-30

申请号：EP14779271

申请日：2014-03-24

申请人： UNIV TOHOKU ,  DOWA HOLDINGS CO LTD

发明人： SHIMOI NORIHIRO ,  TOHJI KAZUYUKI ,  TANAKA YASUMITSU ,  ZHANG QIWU ,  KAI HIROYUKI

IPC分类号： H01M4/38 ,  C01B33/113 ,  H01M4/48

CPC分类号： H01M4/485 ,  C01B33/113 ,  H01M4/134 ,  H01M4/386 ,  H01M10/0525

摘要： [Problem] In the case where a silicon substance having a high theoretical capacity as a negative electrode active material for a lithium ion secondary battery is used as a negative electrode active material, such a negative electrode active material is provided that has a high initial battery capacity and suffers less deterioration in performance even when many cycles of charge and discharge are repeated. A lithium ion secondary battery using the negative electrode active material is provided. [Solution] Silicon and copper (2) oxide, or silicon, metallic copper and water are pulverized and simultaneously mixed in a pulverization device, thereby providing a negative electrode active material that has good cycle characteristics and a large battery capacity.

摘要翻译： [问题]使用具有高理论容量的硅物质作为负极活性物质的负极活性物质的情况下，提供具有高初始电池的负极活性物质 容量并且即使在重复充电和放电的许多周期时，性能也会降低。 提供使用负极活性物质的锂离子二次电池。 [解决方案]将硅和铜（2）氧化物或硅，金属铜和水粉碎并在粉碎装置中同时混合，从而提供具有良好的循环特性和大的电池容量的负极活性物质。