Amorphous and nanocrystalline Mg{sub 2}Si thin film electrodes
Journal Article
·
· Journal of Power Sources
OSTI ID:815356
- LBNL Library
Mg{sub 2}Si 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.
- Research Organization:
- Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE Director, Office of Science. Basic Energy Sciences (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 815356
- Report Number(s):
- LBNL--52142
- Journal Information:
- Journal of Power Sources, Journal Name: Journal of Power Sources Vol. 119-212C; ISSN JPSODZ; ISSN 0378-7753
- Country of Publication:
- United States
- Language:
- English
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