NEGATIVE-ELECTRODE MATERIAL POWDER FOR LITHIUM-ION SECONDARY BATTERY AND METHOD FOR PRODUCING SAME
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United States of America Patent
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Issued Date -
Mar 21, 2013
app pub date -
Apr 27, 2011
filing date -
May 25, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided is a negative-electrode material powder for lithium-ion secondary battery including a silicon-rich layer on the surface of a lower silicon oxide powder, and a negative-electrode material powder for said battery comprising a silicon oxide powder, characterized by satisfying c/d<1, where c is the molar ratio of oxygen to silicon on the surface of the silicon oxide powder and d is that for the entire part thereof. It preferably satisfies one of c<1 and 0.8
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