Negative electrode material for nonaqueous electrolyte secondary batteries and manufacturing method thereof
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United States of America Patent
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Nov 26, 2013
Grant Date -
Dec 6, 2012
app pub date -
Jun 25, 2012
filing date -
Dec 25, 2009
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Abstract
The present invention provides a negative electrode material for a nonaqueous electrolyte secondary battery which can improve the cycle properties of a lithium ion secondary battery and a method for manufacturing the negative electrode material. The negative electrode material comprises at least two types of powdery alloy materials A and B in which powdery alloy material A contains Co, Sn, and Fe and does not contain Ti and powdery alloy material B contains Fe, Ti, and Sn, and the proportion of the mass of powdery alloy material B to the sum of the mass of powdery alloy material A and the mass of powdery alloy material B is at least 10 mass % and at most 30 mass %.
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