期刊
ELECTROCHIMICA ACTA
卷 209, 期 -, 页码 574-581出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.05.113
关键词
ionic conductivity; lithium zirconate; neutron powder diffraction; migration map
资金
- FASO of Russia [01201463334]
- program of UB of the RAS [15-8-2-2]
- Russian Science Foundation [14-12-00896] Funding Source: Russian Science Foundation
We present a study of the crystal structure, ionic conductivity and Li migration map in a wide temperature range for the Li2ZrO3 and Li1.8ZrO3-delta samples synthesized by the solid state reaction and soft chemistry methods, respectively. Both samples were found to be Li-deficient at room temperature with the partially vacant Li[1] sites. Thermally activated redistribution of Li+ ions between two lithium sites has been revealed by high temperature neutron diffraction. The redistribution of lithium results in rise of the ionic conductivity and drop of the activation energy observed on the AC conductivity data at the temperatures above 740 K for Li2ZrO3 and 710 K for Li1.8ZrO3-delta. It has been found that more deficient Li1.8ZrO3-delta sample prepared by the soft chemistry method exhibits enhanced ionic conductivity. Three-dimensional lithium migration map composed of the stripe-like migration pathways has been constructed. Most of the elementary channels composing lithium migration map were found to be probabilistic ones, which indicates bottle-necked ionic transport in both compounds. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据