Material With Core-Shell Structure
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United States of America Patent
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Issued Date -
Dec 24, 2009
app pub date -
Jun 20, 2008
filing date -
Jun 20, 2008
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Abandoned
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Abstract
Disclosed is a material having a composite particle. The composite particle includes an outer shell containing an element such as carbon, nitrogen, oxygen or sulfur and an inner core made from a lithium alloying material such as tin, silicon, aluminum and/or germanium. If the outer shell is made from carbon, the outer shell of the composite particle has an average thickness of less than 20 nanometers and the composite particle has an outer mean diameter of less than 100 nanometers. In some instances, the inner core is made from tin, a tin binary alloy, a tin tertiary alloy or a tin quaternary alloy.
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