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    • 31. 发明公开
    • Method for producing an active material for lithium secondary battery and a lithium secondary battery
    • 用于锂二次电池和锂二次电池用活性物质的制造方法
    • EP2278642A1
    • 2011-01-26
    • EP10187540.9
    • 2008-11-11
    • GS Yuasa International Ltd.
    • Endo, DaisukeYasutomi, MikiKatayama, YoshihiroNukuda, Toshiyuki
    • H01M4/525C01G45/00C01G51/00C01G53/00H01M4/505H01M10/052H01M10/44
    • H01M4/0445C01G45/1228C01G51/42C01G51/50C01G53/50C01P2002/50C01P2002/72C01P2002/74C01P2002/77C01P2004/82C01P2006/40H01M4/505H01M4/525H01M10/052H01M10/446H02J7/00Y10T29/49108
    • The present invention provides a
      process for producing a lithium secondary battery which employs charging method where a positive electrode upon charging has a maximum achieved potential of 4.3V (vs. Li/Li + ) or lower, comprising:
      charging the lithium secondary battery to reach at least a region with relatively flat fluctuation of potential appearing in a positive electrode potential region exceeding 4.3V (vs. Li/Li + ) and 4.8V (vs. Li/Li + ) or lower,
      wherein the lithium secondary battery includes an active material comprising a solid solution of a lithium transition metal composite oxide having an α-NaFeO 2 type crystal structure;
      wherein the composition ratio of Li, Co, Ni, and Mn contained in the solid solution satisfies Li 1+1/3x Co 1-x-y Ni y/2 Mn 2x/3+y/2 with x + y ≤ 1, 0 ≤ y and 1 - x - y = z; and
      wherein, in an Li[Li 1/3 Mn 2/3 ]O 2 (x)-LiNi 1/2 Mn 1/2 O 2 (y)-LiCoO 2 (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).
    • 本发明提供了一种用于制造锂二次电池采用哪种充电方法,其中在充电时的正极具有4.3V的最大实现电位(对Li / Li +)或更低,其包括:锂二次电池充电达到 用的电位在正极电位区域超过4.3V亮相的相对平坦的波动(对Li / Li +)和4.8V(对Li / Li +)或更低的至少一个区域,worin所述锂二次电池包括在活性 包括材料具有±的锂过渡金属复合氧化物的固溶体-NaFeO 2型晶体结构; worin包含在固体溶液SATIS外资企业黎璃,钴,镍,和Mn的组成比为1 + 1/3×Co 1-XY的Ni Y / 2的Mn 2倍/ 3 + Y / 2与X + Y‰¤1 0 ‰¤y和1 - X - Y = Z; worin和,在Li [锂锰1/3 2/3] O 2(x)的1/2 -LiNi 1/2的Mn O 2(y)的-LiCoO 2(z)系三角相图中,(X,Y ,Z)是通过在一定范围的值存在于或由线的顶点所限定的七边形(ABCDEFG)的内表示; 点A(0.45,0.55,0),点B(0.63,0.37,0),C点(0.7,0.25,0.05),点D(0.67,0.18,0.15),点E(0.75,0,0.25) 点F(0.55,0,12:45),和点G(0.45,0.2,0.35)。
    • 32. 发明公开
    • ACTIVE MATERIAL FOR LITHIUM RECHARGEABLE BATTERY, LITHIUM RECHARGEABLE BATTERY, AND PROCESS FOR PRODUCING THE SAME
    • 锂离子电池和锂离子电池
    • EP2219251A1
    • 2010-08-18
    • EP08850571.4
    • 2008-11-11
    • GS Yuasa International Ltd.
    • ENDO, DaisukeYASUTOMI, MikiKATAYAMA, YoshihiroNUKUDA, Toshiyuki
    • H01M4/52C01G45/00C01G51/00C01G53/00H01M4/50H01M10/40
    • 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-NaFeO 2 type crystal structure, in which the composition ratio of Li, Co, Ni, and Mn contained in the solid solution satisfies Li 1+(1/3)x Co 1-x-y Ni (1/2)y Mn (2/3)x+(1/2)y (x + y ≤ 1, 0 ≤ y and 1 - x - y = z); in an Li[Li 1/3 Mn 2/3 ]O 2 (x)-LiNi 1/2 Mn 1/2 O 2 (y)-LiCoO 2 (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 (004) ≥1.56 and at the end of discharge is I (003 )/I (004) >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.
    • 本发明提供一种用于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±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Li 1+(1/3)x Co 1-xy Ni(1/2)y Mn(2/3)x +(1/2)y(x + y‰¤1,0‰¤y和1-x-y = z); 在Li [Li 1/3 Mn 2/3] O 2(x)-LiNi 1/2 Mn 1/2 O 2(y)-LiCoO 2(z)型三元相图中,(x,y,z) 由存在于由顶点限定的七边形(ABCDEFG)的线上或内的范围内的值表示; 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(004)‰¥1.56,放电结束时为I( 003)/ I(004)> 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。