Method of preparing a negative active material for rechargeable lithium battery
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United States of America Patent
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Feb 9, 2010
Grant Date -
Dec 11, 2008
app pub date -
Jul 30, 2008
filing date -
Aug 22, 2003
priority date (Note) -
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Abstract
Disclosed is a negative active material for a rechargeable lithium battery comprising a Si phase, a SiM phase and at least one of a X phase and a SiX phase, wherein each of phases has a crystal grain size of 100 nm and 500 nm. The element M is at least one selected from the group consisting of Ni, Co, B, Cr, Cu, Fe, Mn, Ti, and Y, the element X is at least one selected from the group consisting of Ag, Cu, and Au. However, where M is Cu, X is not Cu.
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