公开(公告)号：US07851088B2

公开(公告)日：2010-12-14

申请号：US10806206

申请日：2004-03-23

申请人： Takeshi Takahashi ,  Takeshi Oba ,  Kenji Fujino ,  Junichi Tokuno ,  Masuhiro Morizaki ,  Takeyuki Kondo ,  Jun Seyama

发明人： Takeshi Takahashi ,  Takeshi Oba ,  Kenji Fujino ,  Junichi Tokuno ,  Masuhiro Morizaki ,  Takeyuki Kondo ,  Jun Seyama

IPC分类号： H01M4/48 ,  H01M4/52 ,  H01M4/58 ,  C01G51/04 ,  C01G53/04

CPC分类号： H01M4/131 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0431 ,  H01M10/0525 ,  H01M10/0587

摘要： Disclosed is a positive electrode active material for a nonaqueous electrolyte secondary battery having at least a lithium-transition metal composite oxide of a layer structure, in which an existence ratio of at least one selected from the group consisting of elements which may become tetravalent and magnesium is 20% or more on a surface of the lithium-transition metal composite oxide. By use of this positive electrode active material, a nonaqueous electrolyte secondary battery having excellent battery characteristics, specifically, having excellent high rate characteristics, cycle characteristics, low-temperature characteristics, thermal stability, and the like, under the even more harsh environment for use can be realized.

摘要翻译： 公开了一种非水电解质二次电池用正极活性物质，其至少具有层状结构的锂 - 过渡金属复合氧化物，其中选自可能成为四价的元素和镁中的至少一种的存在比例与镁 在锂 - 过渡金属复合氧化物的表面上为20％以上。 通过使用该正极活性物质，在更恶劣的环境下使用具有优异的电池特性的非水电解质二次电池，具体地，具有优异的高速率特性，循环特性，低温特性，热稳定性等 可以实现。