Amorphous and nanocrystalline Mg2Si thin-film electrodes

Date Published
06/2003
Publication Type
Journal Article
Authors
DOI
10.1016/S0378-7753(03)00135-6
Abstract

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 ∼50 cycles. Interpretations of the superior stability of the amorphous films are examined.

Journal
Journal of Power Sources
Volume
119-121
Year of Publication
2003
Pagination
110-112
ISSN Number
03787753
Short Title
Journal of Power Sources
Keywords
Organizations
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