Structural change of LiNi1/2Mn1/2O2 during charge and discharge in nonaqueous lithium cells
Structural change of LiNi1/2Mn1/2O2 during charge and discharge in nonaqueous lithium cells
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DOI：
10.1016/j.jpcs.2007.10.087
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发表时间：
2008-05
影响因子：
4
通讯作者：
K. Ariyoshi;T. Ichikawa;T. Ohzuku
中科院分区：
文献类型：
--
作者：
K. Ariyoshi;T. Ichikawa;T. Ohzuku
The structural change of LiNi1/2Mn1/2O2(a=2.89Å, c=14.31Å in hexagonal setting) during charge and discharge was examined by means of ex-situ X-ray diffraction (XRD) measurements. The integrated intensity ratio of the (003) to (104) diffraction lines increased from ca. 0.9 at an initial state to ca. 1.5 when LiNi1/2Mn1/2O2was oxidized up to x=0.7 in Li1−xNi1/2Mn1/2O2corresponding to the charge capacity of 200mAhg−1based on the sample weight, while the change in lattice dimensions of a- and c- axis was similar to those of LiCoxNi1−xO2. The change in the intensity ratio of I(003)/I(104)was reversible between ca. 0.9 and 1.5 during charge and discharge. From these results, structural changes of layered lithium insertion material of LiNi1/2Mn1/2O2during charge and discharge were discussed.
