Chemical and structural instabilities of lithium ion battery cathodes
作者： A. Manthiram , J. Choi
DOI: 10.1016/J.JPOWSOUR.2006.04.028
关键词:
摘要: The chemical and structural stabilities of various layered Li1−xNi1−y−zMnyCozO2 cathodes are compared by characterizing the samples obtained chemically extracting lithium from parent with NO2BF4 in an acetonitrile medium. nickel- manganese-rich compositions such as Li1−xNi1/3Mn1/3Co1/3O2 Li1−xNi0.5Mn0.5O2 exhibit better stability than LiCoO2 cathode. While delithiated Li1−xCoO2 tends to form a P3 type phase for (1 − x) < 0.5, maintains original O3 entire 0 ≤ 1 forms O1 0.23. variations phases formed explained on basis differences extraction rate caused degree cation disorder electrostatic repulsions. Additionally, observed capability bears clear relationship rate.
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