Original electrochemical mechanisms of CaSnO3 and CaSnSiO5 as anode materials for Li-ion batteries

被引：34
|
作者：
Mouyane, M. [1 ]
Womes, M. [1 ]
Jumas, J. C. [1 ]
Olivier-Fourcade, J. [1 ]
Lippens, P. E. [1 ]
机构：
[1] Univ Montpellier 2, Equipe Agregats Interfaces & Mat Energie, Inst Charles Gerhardt, CNRS,UMR 5253, F-34095 Montpellier 5, France
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2011年 / 184卷 / 11期
关键词：
CaSnO3; CaSnSiO5; Li-ion batteries; Anode; Sn-119 Mossbauer spectroscopy; NEGATIVE ELECTRODE MATERIAL; SN-119; MOSSBAUER; LITHIUM; TIN; OXIDE; SYSTEM; SNO; SPECTROSCOPY; COMPOSITES; GLASSES;
D O I：
10.1016/j.jssc.2011.08.038
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Calcium stannate (CaSnO3) and malayaite (CaSnSiO5) 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 CaSnO3 and CaSnSiO5 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 Sn-119 Mossbauer spectroscopy. The results reveal similar electrochemical mechanisms for CaSnO3 and CaSnSiO5 but they completely differ from those related to SnO2. (C) 2011 Elsevier Inc. All rights reserved.
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收藏
页码：2877 / 2886
页数：10
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