公开(公告)号：US08632698B2

公开(公告)日：2014-01-21

申请号：US12670798

申请日：2008-07-25

申请人： Jeyoung Kim ,  Taeyeon Kim ,  Seo-Jae Lee ,  Wonseok Chang ,  Seungyoun Choi

发明人： Jeyoung Kim ,  Taeyeon Kim ,  Seo-Jae Lee ,  Wonseok Chang ,  Seungyoun Choi

IPC分类号： H01B1/22 ,  H01B1/24 ,  H01M4/36

CPC分类号： H01B1/20 ,  H01M4/13 ,  H01M4/133 ,  H01M4/366 ,  H01M4/62 ,  H01M10/052 ,  Y02E60/122

摘要： Disclosed is an electrode active material having a core-shell structure, which includes: (a) a core capable of intercalating and deintercalating lithium ions; and (b) a shell including a polymer or an oligomer having a glass transition temperature of 25° C. or less when impregnated with an electrolyte, wherein a surface of the core is coated with the shell. Also, an electrode manufactured by using the electrode active material and a secondary battery including the electrode are disclosed. The shell (b) suppresses the formation of an SEI layer during initial charge of a battery, and prevents initial capacity reduction. Accordingly, it is possible to achieve a high capacity battery. The electrode active material having a core-shell structure, specially a metal (loid) based electrode active material having a core-shell structure can have a slightly higher electric capacity, compared to a conventional electrode active material, specially a conventional metal (loid) based electrode active material, and can minimize gas generation during charge/discharge.

摘要翻译： 公开了具有核 - 壳结构的电极活性材料，其包括：（a）能够嵌入和脱嵌锂离子的芯; 和（b）包含聚合物或低聚物的壳体，其中浸渍有电解质的玻璃化转变温度为25℃或更低，其中芯体的表面涂覆有壳。 另外，公开了使用电极活性物质制造的电极和包含该电极的二次电池。 壳体（b）抑制在电池的初始充电期间形成SEI层，并且防止初始容量降低。 因此，可以实现高容量电池。 具有核 - 壳结构的电极活性材料，特别是具有核 - 壳结构的金属（loid）基电极活性材料可以具有比常规电极活性材料，特别是传统的金属（loid） 并且可以使充放电期间的气体产生最小化。