发明申请
US20150093580A1 POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND POSITIVE ELECTRODE INCLUDING SAME
有权
基本信息:
- 专利标题： POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND POSITIVE ELECTRODE INCLUDING SAME
- 专利标题（中）：用于锂二次电池的正极电极活性材料和包括其中的正极
- 申请号：US14546285 申请日：2014-11-18
- 公开(公告)号：US20150093580A1 公开(公告)日：2015-04-02
- 发明人： Nobuyuki KOBAYASHI , Yukinobu YURA , Shohei YOKOYAMA , Kei SATO
- 申请人： NGK INSULATORS, LTD.
- 优先权： JP2012-228450 20121015; JP2012-263072 20121130; JP2013-092730 20130425; JP2013-149070 20130718
- 主分类号： H01M4/52
- IPC分类号： H01M4/52 ; H01M4/36
摘要：
There is provided a positive electrode active material capable of achieving a high volume energy density and yet superior rate characteristics when configured as a positive electrode for lithium secondary batteries. This positive electrode active material comprises a plurality of secondary particles each comprising primary particles composed of a lithium-nickel based complex oxide having a layered rock-salt structure. The plurality of secondary particles have a volume-based average particle diameter D50 of 5 to 100 μm, and at least part of the plurality of secondary particles are coarse secondary particles having a particle diameter of 9 μm or greater. The coarse secondary particles have a voidage of 5 to 25%, and the ratio of through holes among all voids in the coarse secondary particles is 70% or greater.
摘要（中）：
当配置为锂二次电池的正极时，提供能够实现高体积能量密度和优异的速率特性的正极活性物质。 该正极活性物质包含多个二次粒子，其各自包含由具有层状岩盐结构的锂镍系复合氧化物构成的一次粒子。 多个二次粒子的体积平均粒径D50为5〜100μm，多个二次粒子的至少一部分为粒径为9μm以上的粗大二次粒子。 粗二次粒子的空隙率为5〜25％，粗二次粒子中的所有空隙中的通孔的比率为70％以上。