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Issue 44, 2011
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Polymorphism in Li2(Fe,Mn)SiO4: A combined diffraction and NMR study

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Abstract

Li2MSiO4 compounds have been attracting significant attention as lithium intercalation compounds for the next generation of rechargeable lithium batteries. Their structures consist of slightly distorted close packed oxygen slabs between which cations occupy half the tetrahedral sites, leading to a range of polymorphs. In this paper we describe the rich polymorphism observed across the Li2FezMn(1−z)SiO4 solid solution, characterized by detailed powder neutron and X-ray diffraction studies, combined with solid state NMR. This polymorphism reflects that seen in the end-members, with a gradual transition from Fe-like behaviour for iron-rich compositions, to Mn-like behaviour with increasing manganese content.

Graphical abstract: Polymorphism in Li2(Fe,Mn)SiO4: A combined diffraction and NMR study

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Supplementary files

Article information


Submitted
20 Jun 2011
Accepted
02 Sep 2011
First published
23 Sep 2011

J. Mater. Chem., 2011,21, 17823-17831
Article type
Paper

Polymorphism in Li2(Fe,Mn)SiO4: A combined diffraction and NMR study

C. Sirisopanaporn, R. Dominko, C. Masquelier, A. R. Armstrong, G. Mali and P. G. Bruce, J. Mater. Chem., 2011, 21, 17823
DOI: 10.1039/C1JM12845K

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