Original electrochemical mechanisms of CaSnO{sub 3} and CaSnSiO{sub 5} as anode materials for Li-ion batteries

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.08.038· OSTI ID:21580052

Mouyane, M; Womes, M; Jumas, J C; Olivier-Fourcade, J ^[1]

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1. Institut Charles Gerhardt, UMR 5253 CNRS, Equipe Agregats, Interfaces et Materiaux pour l'Energie, Universite Montpellier II, CC 1502, 34095 Montpellier Cedex 5 (France)

Calcium stannate (CaSnO{sub 3}) and malayaite (CaSnSiO{sub 5}) were synthesized by means of a high temperature solid-state reaction. Their crystal structures and morphologies were characterized by X-ray diffraction (XRD) and Scanning Electron Microscopy; their electrochemical properties were analyzed by galvanostatic tests. The amorphization of the initial electrode materials was followed by XRD. The first discharge of the oxides CaSnO{sub 3} and CaSnSiO{sub 5} shows a plateau at low potential, which is due to the progressive formation of Li-Ca-Sn and/or Li-Sn alloys as shown by {sup 119}Sn Moessbauer spectroscopy. The results reveal similar electrochemical mechanisms for CaSnO{sub 3} and CaSnSiO{sub 5} but they completely differ from those related to SnO{sub 2}. - Graphical abstract: {sup 119}Sn Moessbauer spectra at the end of the first discharge of CaSnO{sub 3} (dashed line) and CaSnSiO{sub 5} (solid line) anodes for Li-ion batteries. Inset shows that relative amounts of Sn(0) based alloys formed during the first discharge are similar for CaSnO{sub 3} and CaSnSiO{sub 5} pristine materials. Highlights: > CaSnSiO{sub 5} and CaSnO{sub 3} as anode materials for Li-ion batteries. > X-ray diffraction and Moessbauer spectroscopy, to explain the electrochemical mechanisms. > Similar mechanisms for the two compounds but different from those of SnO{sub 2} due to Ca.

• OSTI ID: 21580052
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 11; Other Information: DOI: 10.1016/j.jssc.2011.08.038; PII: S0022-4596(11)00478-6; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

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37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALLOYS
AMORPHOUS STATE
ANODES
CALCIUM
CRYSTAL STRUCTURE
ELECTROCHEMISTRY
LITHIUM IONS
MATERIALS
MOESSBAUER EFFECT
MORPHOLOGY
SCANNING ELECTRON MICROSCOPY
SOLIDS
TEMPERATURE RANGE 0400-1000 K
TIN 119
TIN OXIDES
X-RAY DIFFRACTION
ALKALINE EARTH METALS
CHALCOGENIDES
CHARGED PARTICLES
CHEMISTRY
COHERENT SCATTERING
DAYS LIVING RADIOISOTOPES
DIFFRACTION
ELECTRODES
ELECTRON MICROSCOPY
ELEMENTS
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
METALS
MICROSCOPY
NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIOISOTOPES
SCATTERING
STABLE ISOTOPES
TEMPERATURE RANGE
TIN COMPOUNDS
TIN ISOTOPES