New Sn-based composites as anode materials for Li-ion batteries

被引：33

作者：

Aboulaich, A. ^{[1
]}

Mouyane, M. ^{[1
]}

Robert, F. ^{[1
]}

Lippens, P. -E. ^{[1
]}

Olivier-Fourcade, J. ^{[1
]}

Willmann, P. ^{[2
]}

Jumas, J. C. ^{[1
]}

机构：

[1] Univ Montpellier 2, CNRS UMR 5072, Lab Agregats Mol & Mat Inorgan, F-34095 Montpellier 5, France

[2] Ctr Natl Etud Spatiales, F-31401 Toulouse, France

来源：

JOURNAL OF POWER SOURCES | 2007年 / 174卷 / 02期

关键词：

Sn-based composites; lithium-ion batteries; Conversion Electron Mossbauer Spectroscopy; anode materials; tin based glass;

D O I：

10.1016/j.jpowsour.2007.06.173

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new strategy was developed to synthesize tin-composite materials. The Sn:BPO4 and Sn:CaSiO3 composites were obtained by solid state reaction, but the BPO4 and CaSiO3 matrices were synthesized by solid state reaction and sol-gel method, respectively. These materials are characterized by X-ray diffraction, Sn-119 Mossbauer spectroscopy and electrochemical tests. The results show that these new materials are efficient during electrochemical cycling (500 mAh g(-1)), because of a good dispersion of Sn particles into the matrix. From the second cycle, charge and discharge reversibility is linked to both reversible LixSn alloy forming and the modification of the tin particle surface showed by Conversion Electron Mossbauer spectroscopy (CEMS) which allows us to characterize the sample surface. The irreversible capacity observed for the first charge/discharge cycle is due to tin oxide reduction and passivation of the anode surface by electrolyte solution decomposition (SEI layer). (C) 2007 Published by Elsevier B.V.

引用

页码：1224 / 1228

页数：5

共 13 条

[1] In situ 119Sn Mossbauer spectroscopy study of Sn-based electrode materials [J].