Ordering determination of Li2CoSiO4 polymorphs by first-principles calculations

Ordering determination of Li2CoSiO4 polymorphs by first-principles calculations
复制标题

通过第一性原理计算确定 Li2CoSiO4 多晶型的有序性

DOI:
10.1016/j.cplett.2013.06.066
复制
发表时间:
2013-08-06
影响因子:
2.8
通讯作者:
Li, Jun
Li, Jun
中科院分区:
化学4区
文献类型:
--
作者:
Zhang, Caixia;Chen, Zhenlian;Li, Jun

文献摘要

被引文献

相似文献

采用第一性原理计算和模拟XRD研究了Li 2CoSiO 4的Pmn 2(1),Pbn 2(1)和P2(1)/n对称性.我们发现,复杂的多晶型结构,其特征在于过渡金属有序,这提出了一个指纹在XRD光谱。确定了β(II)-Pmn 2(1)多晶型物的Li/Co混合顺序,其提供了实现高度稳定的嵌入循环的结构模板。我们说明了Li 2CoSiO 4多晶型物的材料性质取决于阳离子排序,我们提供的见解,在高压和高温下的材料制备。这可能有助于利用固溶体策略实现新的硅酸盐材料。(C)2013爱思唯尔有限公司版权所有。
First-principles computations coupled with simulated Xrd are used to investigate Li2CoSiO4 polymorphism with symmetries Pmn2(1), Pbn2(1) and P2(1)/n. We find that complex polymorphic structures can be characterized by transition metal ordering, which presents a fingerprint in the Xrd spectra. Li/Co mixing order is determined for beta(II)-Pmn2(1) polymorph, which provides a structural template to achieve highly stable intercalation cycling. We illustrate that the material properties of Li2CoSiO4 polymorphs depend on cationic orderings, and we offer insights on materials preparation under high pressure and heat. This may help realize new silicate materials using the strategy of solid solutions. (C) 2013 Elsevier B.V. All rights reserved.