公开(公告)号：US20090017383A1

公开(公告)日：2009-01-15

申请号：US12175652

申请日：2008-07-18

申请人： Manabu SUHARA ,  Naoshi SAITOH ,  Kazushige HORICHI ,  Megumi UCHIDA

发明人： Manabu SUHARA ,  Naoshi SAITOH ,  Kazushige HORICHI ,  Megumi UCHIDA

IPC分类号： H01M4/40

CPC分类号： H01M4/1315 ,  C01G51/006 ,  C01G51/42 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2002/74 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/45 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M4/131 ,  H01M4/485 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0565 ,  H01M2004/021

摘要： A positive electrode active material for a lithium secondary battery containing a lithium-cobalt composite oxide, which has a large volume capacity density, has a high safety and is excellent in charge and discharge cyclic durability, and its production process, are provided.A lithium-cobalt composite oxide represented by the formula LipCoxMyOzFa (wherein M is a transition metal element other than Co or an alkaline earth metal element, 0.9≦p≦1.1, 0.980≦x≦1.000, 0≦y≦0.02, 1.9≦z≦2.1, x+y=1 and 0≦a≦0.02) and comprising a mixture containing substantially spherical hard first particles of lithium-cobalt composite oxide having such a sharp particle size distribution that the volume basis cumulative size D10 is at least 50% of the average particle size D50, and the volume basis cumulative size D90 is at most 150% of the average particle size D50, and second particles of lithium-cobalt composite oxide filling the space among the first particles, in a mass ratio of first particles/second particles of from 1/2 to 9/1, and process for producing the same.

摘要翻译： 提供了具有大体积容量密度的含有锂钴复合氧化物的锂二次电池用正极活性物质，其安全性高，充放电循环耐久性优异，其制造方法。 由式LipCoxMyOzFa表示的锂钴复合氧化物（其中M是除Co或碱土金属元素以外的过渡金属元素，0.9 <= p <= 1.1,0.980 <= x <= 1.000,0 <= y < = 0.02，1.9 <= z <= 2.1，x + y = 1，0 <= a <= 0.02），并且包含含有基本上球形的硬质的首先具有如此尖锐的粒度分布的锂 - 钴复合氧化物颗粒的混合物， 体积基础累积尺寸D10为平均粒径D50的至少50％，体积基础累积尺寸D90为平均粒径D50的150％以下，填充空间的第二粒子的锂钴复合氧化物 第一颗粒/第二颗粒的​​质量比为1/2至9/1的第一颗粒及其制备方法。