Process for producing positive electrode active material for lithium secondary battery
    2.
    发明申请
    Process for producing positive electrode active material for lithium secondary battery 有权
    锂二次电池用正极活性物质的制造方法

    公开(公告)号:US20050214645A1

    公开(公告)日:2005-09-29

    申请号:US11136493

    申请日:2005-05-25

    摘要: To provide a process for producing a lithium-cobalt composite oxide for a positive electrode of a lithium secondary battery, which has a large volume capacity density, high safety, high charge and discharge cycle durability, high press density and high productivity. A process for producing 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, O.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), characterized in that as a cobalt source, a mixture is used which comprises cobalt hydroxide in the form of substantially spherical secondary particles with an average particle size of from 8 to 20 μm formed by agglomeration of primary particles and tricobalt tetroxide in the form of secondary particles with an average particle size of from 2 to 10 μm formed by agglomeration of primary particles, in a cobalt atomic ratio of from 5:1 to 1:5, and firing is carried out at from 700 to 1,050° C.

    摘要翻译: 为了提供具有大容量密度,高安全性,高充放电循环耐久性,高压力密度和高生产率的锂二次电池正极用锂钴复合氧化物的制造方法。 一种由下式表示的锂 - 钴复合氧化物的制备方法:其中R 1,R 2,R 2, (其中M是除Co以外的过渡金属元素或碱土金属元素,O.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),其特征在于,作为钴源,使用包含基本上为球形的氢氧化钴的混合物 平均粒度为8〜20μm的二次粒子是通过一次粒子和四氧化四铁的结合而形成的,该二次粒子是以原子粒子聚集形成的平均粒径为2〜10μm的二次粒子,以钴原子 比例为5:1至1:5,焙烧时间为700至1050℃。

    Liquid-crystal polyester resin composition

    公开(公告)号:US06664341B2

    公开(公告)日:2003-12-16

    申请号:US10009639

    申请日:2001-12-14

    IPC分类号: C08L6703

    摘要: A liquid crystal polyester resin composition which suppresses the formation of a blister caused by a heat treatment at a high temperature and has excellent moldability. This composition comprises (A) a liquid crystal polyester comprising at least two aromatic oxycarbonyl recurring units and (B) a liquid crystal polyester comprising at least two aromatic oxycarbonyl recurring units, at least one aromatic dioxy recurring unit and at least one aromatic dicarbonyl recurring unit. The weight ratio of the liquid crystal polyester (A) to the liquid crystal polyester (B) is 90/10 to 30/70.