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.
引用
收藏
页码：2877 / 2886
页数：10
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