Cathode active material for lithium secondary battery
    6.
    发明授权
    Cathode active material for lithium secondary battery 有权
    锂二次电池用阴极活性物质

    公开(公告)号:US08492032B2

    公开(公告)日:2013-07-23

    申请号:US13050739

    申请日:2011-03-17

    摘要: Provided is a lithium transition metal oxide having an α-NaFeO2 layered crystal structure, as a cathode active material for lithium secondary battery, wherein the transition metal includes a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is more than +3, and the lithium transition metal oxide satisfies Equations 1 and 2 below: 1.0

    摘要翻译: 本发明提供一种具有α-NaFeO 2层状晶体结构的锂过渡金属氧化物作为锂二次电池的正极活性物质,其中,过渡金属包含Ni和Mn的共混物,除锂以外的过渡金属的平均氧化数多 (Ni)/ m(Mn)(1)m(Ni2 +)/ m(Mn4 +)<1(2)其中m(Ni) / m(Mn)表示镍与锰的摩尔比,m(Ni2 +)/ m(Mn4 +)表示Ni2 +与Mn4 +的摩尔比。 与传统的阴极活性材料相比,本发明的阴极活性材料通过将过渡金属的氧化数控制到高于+ 3的水平,具有均匀且稳定的层状结构,因此有利地提高了整体电化学性能,包括电容, 特别是优异的高速率充放电特性。

    Cathode active material for lithium secondary battery
    8.
    发明授权
    Cathode active material for lithium secondary battery 有权
    锂二次电池用阴极活性物质

    公开(公告)号:US08497039B2

    公开(公告)日:2013-07-30

    申请号:US13050730

    申请日:2011-03-17

    摘要: Provided is a cathode active material which is lithium transition metal oxide having an α-NaFeO2 layered crystal structure, wherein the transition metal is a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is more than +3, and lithium transition metal oxide satisfies the Equation m(Ni)≧m(Mn) (in which m (Ni) and m (Mn) represent an molar number of manganese and nickel, respectively). The lithium transition metal oxide has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.

    摘要翻译: 提供了具有α-NaFeO 2层状晶体结构的锂过渡金属氧化物的正极活性物质,其中过渡金属是Ni和Mn的共混物,除锂之外的过渡金属的平均氧化数大于+3,并且 锂过渡金属氧化物满足公式m(Ni)> = m(Mn)(其中m(Ni)和m(Mn)分别表示锰和镍的摩尔数)。 锂过渡金属氧化物通过将过渡金属的氧化数控制到高于+ 3的水平,具有均匀且稳定的层状结构,因此有利地实现包括电容在内的改进的整体电化学性质,特别是优异的高速率充电/放电特性 。