Abstract Relaxation analysis has been carried out on lithium graphite intercalation compound (Li-GIC) focusing on the variation of stage structure and graphene interlayer distances. X-ray diffraction coupled with the one-dimensional Rietveld analysis revealed that, after the termination of electrochemical lithium insertion, excessively formed stage I partly transforms into stage II during the relaxation process. In addition, the periodic stacking of defective lithium layers forming stage II orders the lithium occupation at the relaxation, which is more apparently observed for faster charged sample. Even after the lithium extraction, gradual stage changes from I to II accompanied by the ordering of lithium occupation in stage II have been observed at the relaxation process. Lithium ion is rather uniformly intercalated or deintercalated in the graphene interlayers, while Li-GIC turned into ordered stage structure to achieve the stable state at the relaxation time.

中文翻译：

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嵌锂石墨的弛豫阶段分析

摘要 对锂石墨插层化合物（Li-GIC）进行了弛豫分析，重点关注阶段结构和石墨烯层间距离的变化。X 射线衍射结合一维 Rietveld 分析表明，在电化学锂嵌入终止后，过度形成的阶段 I 在弛豫过程中部分转变为阶段 II。此外，形成阶段 II 的有缺陷锂层的周期性堆叠使松弛时的锂占据有序，这对于更快充电的样品更明显。即使在锂提取之后，在弛豫过程中也观察到从 I 到 II 的逐渐阶段变化，伴随着阶段 II 中锂占据的顺序。