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    • 29. 发明申请
    • Ni-based lithium transition metal oxide
    • Ni基锂过渡金属氧化物
    • US20060233696A1
    • 2006-10-19
    • US11104734
    • 2005-04-13
    • Jens PaulsenHong-Kyu ParkYong Kwon
    • Jens PaulsenHong-Kyu ParkYong Kwon
    • C01D1/02
    • C01G53/006C01G45/1228C01G51/50C01G53/42C01G53/50C01P2002/77C01P2002/88C01P2004/03C01P2006/40C01P2006/80H01M4/505H01M4/525H01M10/052Y02P20/129
    • The present invention provides a powderous lithium transition metal oxide with the composition as represented by the below Formula and prepared by solid state reaction in air from a mixed transition metal precursor and Li2CO3, with being practically free of Li2CO3 impurity: LixMyO2 wherein M=M′l-kAk, where M′=Nil-a-b(Ni1/2Mn1/2)aCob on condition of 0.65≦a+b≦0.85 and 0.1≦b≦0.4; A is a dopant; and 0≦k≦0.05; and x+y=2 on condition of 0.95≦x≦1.05. The Ni-based lithium transition metal oxide according to the present invention has a well-layered structure, and also improved safety, cycling stability and stability against aging and low gas evolution during storage, when used as an active material for cathode of lithium secondary batteries, because it has a high sintering stability and is substantially free of soluble bases. Moreover, the lithium transition metal oxide of the present invention can be prepared by a low-cost process using a mixed transition metal precursor and Li2CO3 as raw stocks and under relatively unrestricted conditions.
    • 本发明提供一种粉末状锂过渡金属氧化物,其组成如下式所示,并通过空气中的混合过渡金属前体和Li 2 CO 3 3固相反应制备, 实际上不含有Li 2 CO 3杂质:<?in-line-formula description =“In-line Formulas”end =“lead”→> α-in-line-formula description =“In-line Formulas”end =“tail”?>其中 M = M'其中M'= Ni实验室(Ni 1/2 Mn x + y = 2。 根据本发明的Ni基锂过渡金属氧化物具有良好的结构,并且还提高了安全性,循环稳定性和 由于其具有高的烧结稳定性并且基本上不含可溶性碱,所以当用作锂二次电池阴极的活性材料时,储存期间的稳定性和储存期间的低气体逸出。 此外,本发明的锂过渡金属氧化物可以通过使用混合过渡金属前体和Li 3 CO 3 3作为原料的低成本方法制备, 相对无限制的条件。