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    • 8. 发明授权
    • Process for producing positive electrode active material for lithium secondary battery
    • 锂二次电池用正极活性物质的制造方法
    • US07192672B2
    • 2007-03-20
    • US11136493
    • 2005-05-25
    • Kazushige HorichiManabu SuharaNaoshi SaitoMegumi Uchida
    • Kazushige HorichiManabu SuharaNaoshi SaitoMegumi Uchida
    • H01M4/00
    • H01M10/0525C01G51/42C01P2002/52C01P2002/72C01P2004/51C01P2004/61C01P2006/11C01P2006/12C01P2006/40H01M4/131H01M4/1315H01M4/485H01M4/525H01M2004/021
    • 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, 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), 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.
    • 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,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),其特征在于,作为钴源,使用包含基本上球形二次粒子形式的氢氧化钴的混合物 平均粒度为8〜20μm的原子粒子的原子比通过一次粒子的聚集而形成的平均粒径为2〜10μm的二次粒子的一次粒子和四氧化四铁的凝聚而形成的平均粒径为8〜 从5:1至1:5,并且在700至1050℃进行烧制。