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首页> 外文会议>8th Asian Conference on Solid State Ionics: Trends in the New Millennium; Dec 15-19, 2002; Langkawi, Malaysia >STUDIES ON FAST ION TRANSPORT IN SILVER SULPHIDE HALOGENIDES
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STUDIES ON FAST ION TRANSPORT IN SILVER SULPHIDE HALOGENIDES

机译：卤化银中快速离子迁移的研究

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摘要

The need for solid state ionics with fast ion transport at or near room temperature has tempted researchers to look for such materials and study their relevant properties for battery and other applications. One group of such candidates discovered early is the Silver Sulphide halogenides with their simple structure endowed with a disordered manifestation of Silver ions. The convenient phase transition exhibited by them at nearby room temperature has attracted them as good solid-state ionic materials. We were tempted to study the nature of ion diffusion in them using a reaction coordinate approach with the phonons excited in these materials. In the present paper we discuss the results of our investigation on AgSBr and AgSI on the nature of ion transport and the role such transport plays in deciding them as fast ion materials. Unlike a simulation study, in the present work we estimate the dynamics of all the relevant ions in deciding the jump frequency of Silver ion in such a lattice in the frame work of phonon field and hence obtain the diffusion profile of the jumping Ag+ ion. The results of the calculation are compared with the existing experimental results and also with other earlier calculations.
机译：对在室温或接近室温下具有快速离子传输能力的固态离子的需求吸引了研究人员寻找这种材料并研究其在电池和其他应用中的相关性能。较早发现的一组这类候选物是硫化银卤化物，其简单结构赋予无序的银离子表现。它们在室温附近表现出的便利的相变吸引了它们作为良好的固态离子材料。我们很想使用反应坐标方法对这些材料中激发的声子进行研究，研究其中离子扩散的性质。在本文中，我们讨论了我们关于AgSBr和AgSI的离子迁移性质的研究结果以及这种迁移在决定它们作为快速离子材料中所起的作用。与模拟研究不同，在本工作中，我们在确定声子场框架中此类晶格中银离子的跳跃频率时，估计了所有相关离子的动力学，从而获得了跳跃的Ag +离子的扩散曲线。计算结果与现有实验结果以及其他早期计算结果进行了比较。

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