In situ X-ray diffraction study of the lithium excess layered oxide compound Li[Li0.2Ni0.2Mn0.6]O2 during electrochemical cycling
In situ X-ray diffraction study of the lithium excess layered oxide compound Li[Li0.2Ni0.2Mn0.6]O2 during electrochemical cycling
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DOI：
10.1016/j.ssi.2011.11.018
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发表时间：
2012-01-18
影响因子：
3.2
通讯作者：
Jones, Jacob L.
中科院分区：
文献类型：
--
作者：
Fell, Christopher R.;Chi, Miaofang;Jones, Jacob L.
利用实验室x射线衍射仪采集了Li[NixLi1/3-2x/3Mn2/3-x/3]O-2族层状锂过量化合物Li[Li0.2Ni0.2Mn0.6]O-2 （x=1/5）第一次电化学充放电循环时的原位x射线衍射图。峰位置、晶格参数和微应变的动态变化有助于解释这类材料中锂的脱嵌机制。在第一个循环过程中，晶格参数的位移具有很强的各向异性。原位电化学测量显示，在第一个电化学循环中，应变发生了动态变化，这可以用已知的锂和过渡金属（TM）迁移机制来解释。Elsevier B.V.出版
In situ X-ray diffraction patterns were collected using a laboratory X-ray diffractometer during the first electrochemical charge/discharge cycle of the layered lithium excess compound Li[Li0.2Ni0.2Mn0.6]O-2 in the family of Li[NixLi1/3-2x/3Mn2/3-x/3]O-2 (x=1/5). Dynamic changes in peak positions, lattice parameters, and microstrain help to explain the lithium de-intercalation mechanism in this class of materials. Strong anisotropy is observed in the shifts of the lattice parameters during the first cycle. The in situ electrochemical measurement shows dynamically changing strain during the first electrochemical cycle that is explained by known lithium and transition metal (TM) migration mechanisms. Published by Elsevier B.V.