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Title: Crystal structure, phase relations and electrochemical properties of monoclinic Li{sub 2}MnSiO{sub 4}

Abstract

Phase relations in the MnO-SiO{sub 2}-Li{sub 4}SiO{sub 4} subsystem have been investigated by X-ray diffraction after solid-state reactions in hydrogen at 950-1150 deg. C. Both cation-deficient and cation-excess solid solutions Li{sub 2+2} {sub x} Mn{sub 1-} {sub x} SiO{sub 4} (-0.2{<=}x{<=}0.2) based on Li{sub 2}MnSiO{sub 4} have been found. According to Rietveld analysis, Li{sub 2}MnSiO{sub 4} (monoclinic, P2{sub 1}/n, a=6.3368(1), b=10.9146(2), c=5.0730(1) A, {beta}=90.987(1){sup o}) is isostructural with {gamma} {sub II}-Li{sub 2}ZnSiO{sub 4} and low-temperature Li{sub 2}MgSiO{sub 4}. All components are in tetrahedral environment, (MnSiO{sub 4}){sup 2-} framework is built of four-, six- and eight-member rings of tetrahedra. Testing Li{sub 2}MnSiO{sub 4} in an electrochemical cell showed that only 4% Li could be extracted between 3.5 and 5 V against Li metal. These results are discussed in comparison with those for recently reported orthorhombic layered Li{sub 2}MnSiO{sub 4} and other tetrahedral Li{sub 2} MXO{sub 4} phases. - Graphical abstract: Arrangement of Mn (large white balls) and Si (small grey balls) atoms in Li{sub 2}MnSiO{sub 4} structure. Bold lines connect atoms linked via common oxygen (not shown)

Authors:
 [1];  [2];  [1];  [1];  [1]
  1. Chemistry Faculty, Rostov State University, 7 ul. Zorge, Rostov-na-Donu 344090 (Russian Federation)
  2. Chemistry Faculty, Rostov State University, 7 ul. Zorge, Rostov-na-Donu 344090 (Russian Federation), E-mail: apetrenko@rsu.ru
Publication Date:
OSTI Identifier:
21015745
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal Issue: 3; Other Information: DOI: 10.1016/j.jssc.2007.01.001; PII: S0022-4596(07)00015-1; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ELECTROCHEMICAL CELLS; ELECTROCHEMISTRY; LITHIUM SILICATES; MANGANESE OXIDES; MONOCLINIC LATTICES; ORTHORHOMBIC LATTICES; SILICON OXIDES; SOLID SOLUTIONS; TEMPERATURE RANGE 1000-4000 K; X-RAY DIFFRACTION

Citation Formats

Politaev, V.V., Petrenko, A.A., Nalbandyan, V.B., Medvedev, B.S., and Shvetsova, E.S. Crystal structure, phase relations and electrochemical properties of monoclinic Li{sub 2}MnSiO{sub 4}. United States: N. p., 2007. Web. doi:10.1016/j.jssc.2007.01.001.
Politaev, V.V., Petrenko, A.A., Nalbandyan, V.B., Medvedev, B.S., & Shvetsova, E.S. Crystal structure, phase relations and electrochemical properties of monoclinic Li{sub 2}MnSiO{sub 4}. United States. doi:10.1016/j.jssc.2007.01.001.
Politaev, V.V., Petrenko, A.A., Nalbandyan, V.B., Medvedev, B.S., and Shvetsova, E.S. Thu . "Crystal structure, phase relations and electrochemical properties of monoclinic Li{sub 2}MnSiO{sub 4}". United States. doi:10.1016/j.jssc.2007.01.001.
@article{osti_21015745,
title = {Crystal structure, phase relations and electrochemical properties of monoclinic Li{sub 2}MnSiO{sub 4}},
author = {Politaev, V.V. and Petrenko, A.A. and Nalbandyan, V.B. and Medvedev, B.S. and Shvetsova, E.S.},
abstractNote = {Phase relations in the MnO-SiO{sub 2}-Li{sub 4}SiO{sub 4} subsystem have been investigated by X-ray diffraction after solid-state reactions in hydrogen at 950-1150 deg. C. Both cation-deficient and cation-excess solid solutions Li{sub 2+2} {sub x} Mn{sub 1-} {sub x} SiO{sub 4} (-0.2{<=}x{<=}0.2) based on Li{sub 2}MnSiO{sub 4} have been found. According to Rietveld analysis, Li{sub 2}MnSiO{sub 4} (monoclinic, P2{sub 1}/n, a=6.3368(1), b=10.9146(2), c=5.0730(1) A, {beta}=90.987(1){sup o}) is isostructural with {gamma} {sub II}-Li{sub 2}ZnSiO{sub 4} and low-temperature Li{sub 2}MgSiO{sub 4}. All components are in tetrahedral environment, (MnSiO{sub 4}){sup 2-} framework is built of four-, six- and eight-member rings of tetrahedra. Testing Li{sub 2}MnSiO{sub 4} in an electrochemical cell showed that only 4% Li could be extracted between 3.5 and 5 V against Li metal. These results are discussed in comparison with those for recently reported orthorhombic layered Li{sub 2}MnSiO{sub 4} and other tetrahedral Li{sub 2} MXO{sub 4} phases. - Graphical abstract: Arrangement of Mn (large white balls) and Si (small grey balls) atoms in Li{sub 2}MnSiO{sub 4} structure. Bold lines connect atoms linked via common oxygen (not shown)},
doi = {10.1016/j.jssc.2007.01.001},
journal = {Journal of Solid State Chemistry},
number = 3,
volume = 180,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}