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首页> 外文期刊>Physica, B. Condensed Matter >Anion diffusion within highly conducting layered fluorides
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Anion diffusion within highly conducting layered fluorides

机译：阴离子在高导电层状氟化物中的扩散

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Neutron diffraction has played an important role in the study of solids which,possess high values of ionic conductivity, ranging from, 'model' superionic compounds such as AgI and beta-PbF2 to more technologically relevant materials for use within lightweight Li+ batteries and oxide fuel cells. An understanding of the structural properties of these systems is essential to identify those factors which promote high ionic conductivity and underpin the quest for new materials. In recent years, attention has focussed on the role of cations characterized by lone-pair electrons (such as Bi3+, Pb2+, Sn2+ and Tl+) within highly conducting oxides and halides, with differing views concerning their importance in promoting extensive anion disorder. In this context, the results of powder neutron diffraction studies of two layered compounds within the MSnF4 (M = Pb, Sr and Ba) and MSn2F5 (M = K, Rb, Cs and TI) families are presented, to illustrate the structural role of Sn2+ ions within these anion conductors. (c) 2006 Elsevier B.V. All rights reserved.
机译：中子衍射在固体研究中发挥了重要作用，该固体具有很高的离子电导率，范围从“模型”超离子化合物（例如AgI和β-PbF2）到在轻质Li +电池和氧化物燃料中使用的更具技术相关性的材料细胞。对这些系统的结构特性的了解对于确定那些促进高离子电导率并支持对新材料的追求的因素至关重要。近年来，注意力集中在高导电氧化物和卤化物中以孤对电子（例如Bi3 +，Pb2 +，Sn2 +和Tl +）为特征的阳离子的作用上，关于它们在促进广泛的阴离子疾病中的重要性的观点不一。在此背景下，提出了对MSnF4（M = Pb，Sr和Ba）和MSn2F5（M = K，Rb，Cs和TI）族中的两层化合物进行粉末中子衍射研究的结果，以说明分子结构的作用。这些阴离子导体中的Sn2 +离子。 （c）2006 Elsevier B.V.保留所有权利。

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