Ordering determination of Li2CoSiO4 polymorphs by first-principles calculations
Ordering determination of Li2CoSiO4 polymorphs by first-principles calculations
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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
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发表时间:
2013-08-06
影响因子:
2.8
通讯作者:
Li, Jun
中科院分区:
文献类型:
--
作者:
Zhang, Caixia;Chen, Zhenlian;Li, Jun
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.