Amorphous and nanocrystalline Mg2Si thin-film electrodes

被引：45

作者：

Song, SW

Striebel, KA ^{[1
]}

Song, XY

Cairns, EJ

机构：

[1] Ernest Orlando Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA

来源：

JOURNAL OF POWER SOURCES | 2003年 / 119卷

关键词：

nanocrystalline; thin-film electrodes; pulsed laser deposition;

D O I：

10.1016/S0378-7753(03)00135-6

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：

Mg2Si films, prepared by pulsed laser deposition (PLD), were amorphous, as prepared, and nanocrystalline following annealing. Their micro-structure and electrochemical characteristics were studied by high-resolution transmission electron microscopy (HRTEM) and electrochemical cycling against lithium. HRTEM analysis revealed that some excess Si was present in the films. The more amorphous thinner film exhibited excellent cyclability. However, when the film becomes crystalline, the irreversible capacity loss was more significant during the initial cycling and after similar to50 cycles. Interpretations of the superior stability of the amorphous films are examined. Published by Elsevier Science B.V.

引用

页码：110 / 112

页数：3

共 7 条

[1] The insertion mechanism of lithium into Mg2Si anode material for Li-ion batteries [J].