快速导离子的铁石具有矿的拓结构和类似矿的基结构
Kavish Kaup1, Kevin Bishop1, Abdeljalil Assoud1
1Department of Chemistry, Department of Chemical Engineering, and the Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
Journal of the American Chemical Society
|April 30, 2021
概括
我们发现了一种新的硫酸化物Li6B7S13I, 它的立方相显示超声波导电性, 对于先进的电池技术至关重要.
科学领域:
- 材料科学
- 固态化学
- 电化学
背景情况:
- 开发快速导离子的固体电解质对于下一代电池至关重要.
- -硫化合物提供了新的电解质材料的潜力.
研究的目的:
- 报告一个新的硫酸,Li6B7S13I.
- 为了研究它的晶体结构和离子导电特性.
- 了解结构和离子流动性之间的关系.
主要方法:
- 单晶X射线衍射
- 中子粉衍射
- 开始分子动力学 (AIMD) 模拟
主要成果:
- 发现Li6B7S13I结晶在前所未有的立方体和四边形的硫酸盐结构中.
- 立方相具有矿拓和基结构,导致超离子导电 (理论导电率为5.2mS cm-1).
- AIMD和衍射研究阐明了3D离子导电路和离子扰乱在立方相中的作用.
结论:
- 6B7S13I代表了一类新的快速离子导体.
- 立方相的结构对于其高离子导电性至关重要.
- 在四边形阶段的离子排序阻碍了导电,强调了基层结构和晶格对称性的重要性.
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