Atomistic study of lithium ion dynamics in Li12Si7

Shi, Jianjian, Wang, Zhiguo and Fu, Yong Qing (2015) Atomistic study of lithium ion dynamics in Li12Si7. Electrochimica Acta, 186. pp. 71-75. ISSN 0013-4686

LiIonDynamicsinLi12Si7_20150531-Fu.pdf - Accepted Version

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Lithium ion dynamics in crystalline lithium silicide Li12Si7 were studied using density functional theory. Vacancy formation and diffusion of lithium ions showed a strong dependence on crystallographic sites of the lithium ions. The thirteen crystallographic lithium ions in the Li12Si7 can be divided into three types based on their mobilities, and their typical diffusion energy barriers are 0.18, 0.36 and 0.52 eV, respectively. These crystallographic lithium ions take part in the fast diffusion process and are distributed within one dimensional column. The result agrees well with experimental report of the quasi-one dimensional fast diffusion channel in the Li12Si7.

Item Type: Article
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Ay Okpokam
Date Deposited: 26 Nov 2015 12:50
Last Modified: 01 Aug 2021 01:03

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