Mechanism of Lithium Insertion into Magnesium Silicide

Publication Type
Journal Article
Authors
DOI
10.1149/1.1649753
Abstract

The reaction mechanism for electrochemical lithium insertion into magnesium silicide was studies by in situ and ex situ X-ray diffraction (XRD). Lithium intercalation during the initial stages of insertion was indicated by a slight shift toward lower angles in the diffraction patterns. Upon further insertion, Li2MgSi was formed. This was indicated by the appearance of magnesium peaks, the disappearance of Mg2Si peaks, and the appearance of Li2MgSi peaks in the diffraction patterns. Magnesium XRD peaks that accumulated during cycling indicated that the formation of Mg2Si during lithium removal was not entirely reversible. Li2MgSi was synthesized by mechanical alloying. XRD patterns and nuclear magnetic resonance spectra of the mechanically alloyed and electrochemically produced phases are compared.

Journal
Journal of The Electrochemical Society
Volume
151
Year of Publication
2004
Issue
4
Pagination
A493-A496
ISSN Number
00134651
Short Title
J. Electrochem. Soc.
Keywords
Organizations
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