Cathode active material for lithium secondary battery
    3.
    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
    6.
    发明申请
    CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY 有权
    用于锂二次电池的阴极活性材料

    公开(公告)号:US20120012781A1

    公开(公告)日:2012-01-19

    申请号:US13050739

    申请日:2011-03-17

    IPC分类号: H01M4/525 C01D15/02

    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: 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,过渡金属包括Ni和Mn的共混物,除锂以外的过渡金属的平均氧化数更多 (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。

    MATERIAL FOR LITHIUM SECONDARY BATTERY OF HIGH PERFORMANCE
    8.
    发明申请
    MATERIAL FOR LITHIUM SECONDARY BATTERY OF HIGH PERFORMANCE 有权
    锂二次电池性能优良的材料

    公开(公告)号:US20110117662A1

    公开(公告)日:2011-05-19

    申请号:US12893176

    申请日:2010-09-29

    IPC分类号: H01M4/86 G01N31/16

    摘要: Provided is a cathode active material containing a Ni-based lithium mixed transition metal oxide. More specifically, the cathode active material comprises the lithium mixed transition metal oxide having a composition represented by Formula I of LixMyO2 wherein M, x and y are as defined in the specification, which is prepared by a solid-state reaction of Li2CO3 with a mixed transition metal precursor under an oxygen-deficient atmosphere, and has a Li2CO3 content of less than 0.07% by weight of the cathode active material as determined by pH titration. The cathode active material in accordance with the present invention and substantially free of water-soluble bases such as lithium carbonates and lithium sulfates and therefore has excellent high-temperature and storage stabilities and a stable crystal structure. A secondary battery comprising such a cathode active material exhibits a high capacity and excellent characteristics, and can be produced by an environmentally friendly method with low production costs and high production efficiency.

    摘要翻译: 提供含有Ni基锂混合过渡金属氧化物的正极活性物质。 更具体地说,阴极活性材料包括具有由Li x Mn 2 O的式I表示的组成的锂混合过渡金属氧化物,其中M,x和y如说明书中所定义,其通过Li 2 CO 3与混合的固态反应 过氧化物金属前体,并且通过pH滴定测定,Li2CO3含量小于正极活性物质的0.07重量%。 根据本发明的阴极活性材料,基本上不含碳酸锂和硫酸锂等水溶性碱,因此具有优异的高温保存稳定性和稳定的晶体结构。 包含这种正极活性物质的二次电池显示出高容量和优异的特性,并且可以通过环保的方法生产,生产成本低,生产效率高。

    MATERIAL FOR LITHIUM SECONDARY BATTERY OF HIGH PERFORMANCE
    9.
    发明申请
    MATERIAL FOR LITHIUM SECONDARY BATTERY OF HIGH PERFORMANCE 有权
    锂二次电池性能优良的材料

    公开(公告)号:US20110114873A1

    公开(公告)日:2011-05-19

    申请号:US12896025

    申请日:2010-10-01

    IPC分类号: H01M4/52

    摘要: Provided is a lithium mixed transition metal oxide having a composition represented by Formula I of LixMyO2 (M, x and y are as defined in the specification)having mixed transition metal oxide layers (“MO layers”) comprising Ni ions and lithium ions, wherein lithium ions intercalate into and deintercalate from the MO layers and a portion of MO layer-derived Ni ions are inserted into intercalation/deintercalation layers of lithium ions (“reversible lithium layers”) thereby resulting in the interconnection between the MO layers. The lithium mixed transition metal oxide of the present invention has a stable layered structure and therefore exhibits improved stability of the crystal structure upon charge/discharge. In addition, a battery comprising such a cathode active material can exhibit a high capacity and a high cycle stability. Further, such a lithium mixed transition metal oxide is substantially free of water-soluble bases, and thereby can provide excellent storage stability, decreased gas evolution and consequently superior high-temperature stability with the feasibility of low-cost mass production.

    摘要翻译: 本发明提供具有由Ni x离子和锂离子组成的混合过渡金属氧化物层(“MO层”)的LixMyO2(M,x和y如说明书中所定义)的式I所示组成的锂混合过渡金属氧化物,其中 锂离子从MO层插入和脱嵌,并且将一部分MO层衍生的Ni离子插入到锂离子(“可逆锂层”)的嵌入/脱嵌层中,从而导致MO层之间的互连。 本发明的锂混合过渡金属氧化物具有稳定的层状结构,因此在充放电时显示出晶体结构的稳定性提高。 此外,包含这种阴极活性材料的电池可以表现出高容量和高循环稳定性。 此外,这种锂混合过渡金属氧化物基本上不含水溶性碱,从而可以提供优异的储存稳定性,降低的气体逸出性以及因此优异的高温稳定性以及低成本批量生产的可行性。

    CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY
    10.
    发明申请
    CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY 有权
    用于锂二次电池的阴极活性材料

    公开(公告)号:US20110086274A1

    公开(公告)日:2011-04-14

    申请号:US12833502

    申请日:2010-07-09

    IPC分类号: H01M4/525

    摘要: Disclosed herein is a cathode active material based on lithium nickel-manganese-cobalt oxide represented by Formula 1, wherein an ion-conductive solid compound and conductive carbon are applied to a surface of the lithium nickel-manganese-cobalt oxide. A lithium secondary battery having the disclosed cathode active material has improved rate properties and high temperature stability, in turn embodying excellent cell performance.

    摘要翻译: 本文公开了一种基于由式1表示的锂镍锰 - 氧化钴的阴极活性材料,其中将离子导电固体化合物和导电碳施加到锂镍锰 - 氧化钴锂的表面。 具有所公开的阴极活性材料的锂二次电池具有改进的速率特性和高温稳定性,从而具有优异的电池性能。