Reversible Insertion of Sodium in Tin

被引：289

作者：

Ellis, L. D. ^{[1
]}

Hatchard, T. D. ^{[1
]}

Obrovac, M. N. ^{[1
]}

机构：

[1] Dalhousie Univ, Dept Chem, Halifax, NS B3H 3J5, Canada

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2012年 / 159卷 / 11期

基金：

加拿大自然科学与工程研究理事会;

关键词：

LITHIUM; ELECTRODES;

D O I：

10.1149/2.037211jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemistry and the structural changes that occur during sodium insertion and removal from tin are studied by in-situ X-ray diffraction at 30 degrees C. The Sn vs. Na voltage curve has four distinct plateaus, corresponding to four two-phase regions during sodiation, and indicating that four Na-Sn binary alloys are formed. The alloy formed at full sodiation was found to be Na15Si4, as expected from the Na-Sn binary system at equilibrium. The three intermediate Na-Sn phases that form during sodiation have X-ray diffraction patterns that do not correspond to any known equilibrium phase of Na-Sn. More work is needed to characterize these new binary Na-Sn phases. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.037211jes] All rights reserved.

引用

页码：A1801 / A1805

页数：5

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