Positive electrode active materials for secondary batteries and methods of preparing same
    1.
    发明授权
    Positive electrode active materials for secondary batteries and methods of preparing same 有权
    二次电池用正极活性物质及其制备方法

    公开(公告)号:US06878490B2

    公开(公告)日:2005-04-12

    申请号:US10040047

    申请日:2001-10-29

    摘要: The present invention is a positive electrode active material that can be used in secondary lithium and lithium-ion batteries to provide the power capability, i.e., the ability to deliver or retake energy in short periods of time, desired for large power applications such as power tools, electric bikes and hybrid electric vehicles. The positive electrode active material of the invention includes at least one electron conducting compound of the formula LiM1x−y{A}yOz and at least one electron insulating and lithium ion conducting lithium metal oxide, wherein M1 is a transition metal, {A} is represented by the formula ΣwiBi wherein Bi is an element other than M1 used to replace the transition metal M1 and wi is the fractional amount of element Bi in the total dopant combination such that Σwi=1; Bi is a cation in LiM1x−y{A}yOz; 0.95≦x≦2.10; 0≦y≦x/2; and 1.90≦z≦4.20. Preferably, the lithium metal oxide is LiAlO2 or Li2M2O3 wherein M2 is at least one tetravalent metal selected from the group consisting of Ti, Zr, Sn, Mn, Mo, Si, Ge, Hf, Ru and Te. The present invention also includes methods of making this positive electrode active material.

    摘要翻译: 本发明是一种正极活性物质,可用于二次锂离子电池和锂离子电池,以提供电力能力,即在短时间内传递或重新获取能量的能力,对于诸如电力的大功率应用而言是理想的 工具,电动自行车和混合动力电动汽车。 本发明的正极活性物质包括至少一种式LiM 1 y {A} y O z的电子导电化合物和至少一种电子绝缘和锂离子导电的锂金属氧化物,其中M 1是过渡金属 ,{A}由公式SigmawiBi表示,其中Bi是用于替代过渡金属M 1的除了M 1之外的元素,w i是总掺杂剂组合中元素Bi的分数,使得Sigmawi = 1 ; Bi是LiM 1 x-y {A} yOz中的阳离子; 0.95 <= x <= 2.10; 0 <= y <= x / 2; 和1.90 <= z <= 4.20。 优选地,锂金属氧化物是LiAlO 2或Li 2 M 2 O 3,其中M 2是选自Ti,Zr,Sn,Mn,Mo,Si,Ge,Hf,Ru和Te中的至少一种四价金属 。 本发明还包括制造该正极活性物质的方法。