Amon Alfred, Sener M Emre, Rosu-Finsen Alexander, Hannon Alex C, Slater Ben, Salzmann Christoph G
Department of Chemistry, University College London, 20 Gordon Street, WC1H 0AJ London, U.K.
ISIS Facility, Rutherford Appleton Laboratory, Chilton, OX11 0QX Didcot, U.K.
Inorg Chem. 2021 May 3;60(9):6319-6326. doi: 10.1021/acs.inorgchem.1c00049. Epub 2021 Apr 14.
Modern functional glasses have been prepared from a wide range of precursors, combining the benefits of their isotropic disordered structures with the innate functional behavior of their atomic or molecular building blocks. The enhanced ionic conductivity of glasses compared to their crystalline counterparts has attracted considerable interest for their use in solid-state batteries. In this study, we have prepared the mixed molecular glass GaI and investigated the correlations between the local structure, thermal properties, and ionic conductivity. The novel glass displays a glass transition at 60 °C, and its molecular make-up consists of GaI tetrahedra, GaI heteroethane ions, and Ga cations. Neutron diffraction was employed to characterize the local structure and coordination geometries within the glass. Raman spectroscopy revealed a strongly localized nonmolecular mode in glassy GaI, coinciding with the observation of two relaxation mechanisms below in the AC admittance spectra.
现代功能玻璃由多种前驱体制备而成，将各向同性无序结构的优势与原子或分子构建单元的固有功能特性相结合。与晶体相比，玻璃具有增强的离子导电性，这使其在固态电池中的应用备受关注。在本研究中，我们制备了混合分子玻璃GaI，并研究了其局部结构、热性能和离子导电性之间的相关性。这种新型玻璃在60℃时出现玻璃化转变，其分子组成包括GaI四面体、GaI杂乙烷离子和Ga阳离子。利用中子衍射来表征玻璃中的局部结构和配位几何形状。拉曼光谱显示在玻璃态GaI中存在强烈局域化的非分子模式，这与交流导纳谱中低于[此处缺失具体温度值]时观察到的两种弛豫机制相一致。
