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原子分辨率电子显微镜揭示了不同寻常的不对称双边界在电子束敏感NASICON型固体电解质中的作用

Zhenqi Gu^1,2, Kai Wang^1,2,3, Yifei Rao²

¹Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.

|December 11, 2023

概括

研究人员透露了对离子固体电解质的原子级洞察力,例如Li$_{1.3}$Al$_{0.3}$Ti$_{1.7}$(PO$_{4}$) $_{3}$ (LATP). 他们发现了不对称的双边界,显著提高了离子运输,为优化导电性提供了一条新的途径.

科学领域:

材料科学材料科学材料科学
固态化学固态化学
电化学电化学电化学

背景情况:

对非周期性特征的原子级理解对于设计高效的固体电解质至关重要.
大多数固体电解质容易受到电子束损伤,这限制了原子分辨率研究.
以前的研究集中在基于Li$_{0.33}$$La$_{0.56}$TiO$_{3}$和Li$_{7}$La$_{3}$Zr$_{2}$O$_{12}$的材料上.

研究的目的:

为了实现 Li$_{1.3}$Al$_{0.3}$Ti$_{1.7}$(PO$_{4}$) $ (LATP) 固体电解质的原子级观测.
调查非周期性特征在LATP离子导电性中的作用.
探索用于增强固体电解质中的离子运输的新策略.

主要方法:

电子显微镜的样品准备损坏的最小化.
原子分辨率电子显微镜观察.
基于实验确定结构的理论计算.

主要成果:

在原子尺度上成功观察了LATP.
在LATP中确定了丰富的双边界,具有不寻常的不对称原子配置.
理论计算表明,不对称的双边界促进了离子传输.

结论:

在LATP中,不对称的双边界是提高离子导电性的关键因素.
这项研究提出了一种优化固体电解质性能的新方法.
开发的方法有助于对固体电解质的机械研究.

关键词:

这里是纳西康尼.电子束辐射损伤的损害非周期性特征的非周期性特征.扫描传输电子显微镜扫描传输电子显微镜固体电解质是一种固体电解质.

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