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Electrochemical Comparison Between SnO(2) and Li(2)SnO(3) Synthesized at High and Low Temperatures

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Author(s)

F. Belliard, J. T. S. Irvine

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Abstract

Li(2)SnO(3) has been synthesized at 1000 degrees C from Li(2)CO(3) and SnO(2) (high temperature form - HT) and it has also been prepared from ball-milled SnO(2) and Li(2)CO(3) at 650 degrees C (low temperature form - LT). The Li(2)SnO(3) materials have been tested as a negative electrode for possible use in a Li-ion cell and their electrochemical behaviour has been compared with that of SnO(2). In theory, LizSnO(3) and SnO(2) should be able to cycle the same number of lithium atoms per tin atom but on the initial discharge SnO(2) has inserted more lithium than Li(2)SnO(3). During the initial discharge of SnO(2) and Li(2)SnO(3), a side electrochemical reaction seems to be occurring. The resultant compound apparently inserts lithium reversibly for potentials around 1 V; however, cycling from 0.02-2 V significantly degrades performance compared to 0.02-1 V. Li(2)SnO(3) (HT) allows the insertion of more lithium than Li(2)SnO(3) (LT) and SnO(2) in the first charge.

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Details

Original languageEnglish
Pages (from-to)16-21
Number of pages6
JournalIonics
Volume7
Issue number1-2
Publication statusPublished - Jan 2001

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