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    • 9. 发明申请
    • ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, AND METHOD FOR PRODUCING THE SAME
    • 锂二次电池的活性材料,锂二次电池及其制造方法
    • US20100233542A1
    • 2010-09-16
    • US12734579
    • 2008-11-11
    • Daisuke EndoMiki YasutomiYoshihiro KatayamaToshiyuki Nukuda
    • Daisuke EndoMiki YasutomiYoshihiro KatayamaToshiyuki Nukuda
    • H01M4/525H01M4/505H01M4/04
    • H01M4/0445C01G45/1228C01G51/42C01G51/50C01G53/50C01P2002/50C01P2002/72C01P2002/74C01P2002/77C01P2004/82C01P2006/40H01M4/505H01M4/525H01M10/052H01M10/446H02J7/00Y10T29/49108
    • The present invention provides an active material for a lithium secondary battery with a high discharge capacity, particularly for a lithium secondary battery that can increase the discharge capacity in a potential region of 4.3 V or lower, a method for producing the same, a lithium secondary battery having a high discharge capacity, and a method for producing the same. The active material for a lithium secondary battery includes a solid solution of a lithium transition metal composite oxide having an α-NaFeO2 type crystal structure, in which the composition ratio of Li, Co, Ni, and Mn contained in the solid solution satisfies Li1+(1/3)xCo1−x−yNi(1/2)yMn(2/3)x+(1/2)y (x+y≦1, 0≦y and 1−x−y=z); in an Li[Li1/3Mn2/3]O2(x)-LiNi1/2Mn1/2O2(y)-LiCoO2(z) type ternary phase diagram, (x, y, z) is represented by values in a range present on or within a line of a heptagon (ABCDEFG) defined by the vertexes; point A(0.45, 0.55, 0), point B(0.63, 0.37, 0), point C(0.7, 0.25, 0.05), point D(0.67, 0.18, 0.15), point E(0.75, 0, 0.25), point F(0.55, 0, 0.45), and point G(0.45, 0.2, 0.35); and the intensity ratio between the diffraction peaks on (003) plane and (104) plane measured by X-ray diffractometry before charge-discharge is I(003)/I(104)≧1.56 and at the end of discharge is I(003)/I(104)>1. The invention provides a method for producing the active material for a lithium secondary battery using a coprecipitation method, a lithium secondary battery including a positive electrode containing the active material and a method for producing the lithium secondary battery.
    • 本发明提供了一种具有高放电容量的锂二次电池的活性材料,特别是对于能够提高4.3V以下的电位区域的放电容量的锂二次电池,其制造方法,锂二次电池 具有高放电容量的电池及其制造方法。 锂二次电池用活性物质包括具有α-NaFeO 2型晶体结构的锂过渡金属复合氧化物的固溶体,其中固溶体中所含的Li,Co,Ni和Mn的组成比满足Li1 +( 1/3)xCo1-x-yNi(1/2)yMn(2/3)x +(1/2)y(x + y≦̸ 1,0≦̸ y和1-x-y = z) 在Li [Li1 / 3Mn2 / 3] O2(x)-LiNi1 / 2Mn1 / 2O2(y)-LiCoO2(z)型三元相图中,(x,y,z)由存在于或 在由顶点定义的七边形线(ABCDEFG)内; 点A(0.45,0.55,0),点B(0.63,0.37,0),点C(0.7,0.25,0.05),点D(0.67,0.18,0.15),点E(0.75,0,0.25), 点F(0.55,0,0.45)和点G(0.45,0.2,0.35); 在充放电前通过X射线衍射测得的(003)面和(104)面衍射峰之间的强度比为I(003)/ I(104)≥1.56,放电结束时为I(003 )/ I(104)> 1。 本发明提供一种使用共沉淀法制造锂二次电池用活性物质的方法,包含含有活性物质的正极的锂二次电池和锂二次电池的制造方法。