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    Cathode active material powder for lithium secondary battery
    11.
    发明授权
    Cathode active material powder for lithium secondary battery 有权
    锂二次电池用正极活性物质粉末

    公开(公告)号：US07429434B2

    公开(公告)日：2008-09-30

    申请号：US11610529

    申请日：2006-12-14

    申请人： Takuya Mihara ,  Yukimitsu Wakasugi ,  Naoshi Saito ,  Manabu Suhara

    发明人： Takuya Mihara ,  Yukimitsu Wakasugi ,  Naoshi Saito ,  Manabu Suhara

    IPC分类号： H01M4/50 ,  H01M4/52 ,  H01M4/58

    CPC分类号： C01G51/006 ,  C01B25/45 ,  C01G45/1228 ,  C01G45/1235 ,  C01G45/1242 ,  C01G51/42 ,  C01G51/50 ,  C01G53/006 ,  C01G53/50 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2006/40 ,  H01M4/02 ,  H01M4/131 ,  H01M4/1315 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M4/582 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0565 ,  H01M2004/028

    摘要： It is to provide a cathode active material powder for a positive electrode for a lithium secondary battery, which has a large volume capacity density, high safety and excellent durability for charge and discharge cycles. A cathode active material powder for a lithium secondary battery characterized by comprising a first composite oxide powder represented by the formula (1) LipQxMyOzFa (wherein Q is Co or Mn, M is aluminum or an alkaline earth metal element or a transition metal element other than Q, provided that when Q is Co, 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 when Q is Mn, 1≦p≦1.3, x=2−y, 0≦y≦0.05, z=4, and a=0), having an average particle size D50 of from 5 to 30 μm, and having a compression breaking strength of at least 40 MPa; and a second composite oxide powder represented by the formula (2) LipNixCoyMnzNqOrFa (wherein N is aluminum or an alkaline earth metal element or a transition metal element other than Ni, Co and Mn, 0.9≦p≦1.1, 0.2≦x≦0.8, 0≦y≦0.4, 0≦z≦0.5, 0≦q≦0.05, 1.9≦r≦2.1, x+y+z+q=1, and 0≦a≦0.02), having an average particle size D50 of from 2 to 30 μm, and having a compression breaking strength less than 40 MPa; in a ratio (weight ratio) of the first composite oxide powder/the second composite oxide powder being from 95/5 to 30/70.

    摘要翻译： 本发明提供一种锂二次电池用正极用正极活性物质粉末，其具有容量密度大，安全性高，充放电循环优异的耐久性。 一种锂二次电池用正极活性物质粉末，其特征在于，含有式（1）表示的第一复合氧化物粉末， （其中Q是Co或Mn，M是铝或碱土金属元素或Q以外的过渡金属元素，条件是当Q 是Co，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， 当Q为Mn时，平均粒度D50为5〜30μm，1≤p≤3.3，x = 2-y，0≤y≤0.05，z = 4，a = 0） 并且具有至少40MPa的压缩断裂强度; 和由式（2）表示的第二复合氧化物粉末LiNi x N x Mn x N （其中N为铝或碱土金属元素或Ni之外的过渡金属元素，Co和Mn， 0.9 <= p <= 1.1,0.2 <= x <= 0.8,0 <= y <= 0.4,0 <= z <= 0.5,0 <= q <= 0.05,1.9 <= r = 2.1，x + y + z + q = 1，0 <= a <= 0.02），平均粒径D50为2〜30μm，压缩断裂强度小于40MPa; 第一复合氧化物粉末/第二复合氧化物粉末的比例（重量比）为95/5〜30/70。