Cation ordering in Li containing garnets: synthesis and structural characterisation of the tetragonal system, Li7La3Sn2O12

被引：84

作者：

Percival, J. ^{[2
]}

Kendrick, E. ^{[2
,3
]}

Smith, R. I. ^{[4
]}

Slater, P. R. ^{[1
]}

机构：

[1] Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England

[2] Univ Surrey, Guildford GU2 7XH, Surrey, England

[3] E1Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[4] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

来源：

DALTON TRANSACTIONS | 2009年 / 26期

基金：

英国工程与自然科学研究理事会;

关键词：

LITHIUM ION CONDUCTION; TRANSPORT-PROPERTIES; LI5LA3M2O12; M; LI5LA3NB2O12; OXIDES; PR; TA; SM; ND; LI(6)ALA(2)NB(2)O(12);

D O I：

10.1039/b907331k

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In this paper we report synthesis, conductivity and structural data for the novel tetragonal garnet-related system, Li7La3Sn2O12. Neutron diffraction data shows that the tetragonal distortion is related to ordering of Li in three sites within the structure to ensure no short Li-Li interactions. Consistent with the ordered nature of the Li ions, the conductivity is low, with a high activation energy. The results are relevant to related highly conducting cubic garnets, Li(5+x)Ln(3-x)A(x)M(2)O(12) (Ln = rare earth, A = alkaline earth; M = Nb, Ta, Sb), showing how a high Li content can be accommodated by Li ordering within the garnet structure, supporting previous suggestions by Cussen for the cubic garnets, who proposed the presence of local ordering/clustering of Li in tetrahedral and "octahedral" sites to limit unfavourable short Li-Li interactions.

引用

页码：5177 / 5181

页数：5

共 24 条

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