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公开(公告)号:US20120012780A1
公开(公告)日:2012-01-19
申请号:US13050730
申请日:2011-03-17
申请人: Sung Kyun CHANG , Hong-Kyu PARK , Ho Suk SHIN , Seung Tae HONG , Youngsun CHOI
发明人: Sung Kyun CHANG , Hong-Kyu PARK , Ho Suk SHIN , Seung Tae HONG , Youngsun CHOI
CPC分类号: H01M4/505 , H01M4/525 , H01M10/052 , Y02E60/122
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: 本发明提供一种正极活性物质,其为具有α-NaFeO 2层状结晶结构的锂过渡金属氧化物,其中,过渡金属为Ni和Mn的混合物,除锂以外的过渡金属的平均氧化数大于+3, 锂过渡金属氧化物满足方程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 。
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公开(公告)号:US20120012781A1
公开(公告)日:2012-01-19
申请号:US13050739
申请日:2011-03-17
申请人: Sung Kyun CHANG , Hong-Kyu PARK , Ho Suk SHIN , Seung Tae HONG , Youngsun CHOI
发明人: Sung Kyun CHANG , Hong-Kyu PARK , Ho Suk SHIN , Seung Tae HONG , Youngsun CHOI
CPC分类号: H01M4/505 , H01M4/525 , H01M10/052
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。
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公开(公告)号:US20110079752A1
公开(公告)日:2011-04-07
申请号:US12792374
申请日:2010-06-02
申请人: Sinyoung PARK , Sung kyun CHANG , Hong-Kyu PARK , Seung Tae HONG , Youngsun CHOI
发明人: Sinyoung PARK , Sung kyun CHANG , Hong-Kyu PARK , Seung Tae HONG , Youngsun CHOI
IPC分类号: H01M4/90
CPC分类号: H01M4/0471 , C01G53/44 , C01G53/50 , C01P2002/20 , C01P2002/22 , C01P2002/52 , C01P2002/88 , C01P2004/03 , C01P2004/45 , C01P2004/61 , C01P2006/40 , H01M4/131 , H01M4/1391 , H01M4/505 , H01M4/525 , H01M10/052 , Y02E60/122 , Y02P70/54
摘要: Provided is an electrode active material comprising a nickel-based lithium transition metal oxide (LiMO2) wherein the nickel-based lithium transition metal oxide contains nickel (Ni) and at least one transition metal selected from the group consisting of manganese (Mn) and cobalt (Co), wherein the content of nickel is 50% or higher, based on the total weight of transition metals, and has a layered crystal structure and an average primary diameter of 3 μm or higher, wherein the amount of Ni2+ taking the lithium site in the layered crystal structure is 5.0 atom % or less.
摘要翻译: 本发明提供一种电极活性物质,其包含镍系锂过渡金属氧化物(LiMO2),其中镍系锂过渡金属氧化物含有镍(Ni)和选自锰(Mn)和钴中的至少一种过渡金属 (Co),其中镍的含量基于过渡金属的总重量为50%以上,并且具有层状晶体结构和3μm以上的平均一次直径,其中Ni 2+的量取锂位置 在层状晶体结构中为5.0原子%以下。
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