Negative electrode material for nonaqueous electrochemical cells
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United States of America Patent
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Oct 26, 2004
Grant Date -
Apr 3, 2003
app pub date -
Oct 11, 2002
filing date -
Jul 15, 1999
priority date (Note) -
Expired
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Abstract
A negative electrode material is provided for a rechargeable lithium-ion electrochemical cell comprising an intimate mixture of finely-divided elemental nickel and tin particles characterized in that the total oxygen content of said material is less than about 6 percent by weight of the mixture. Preferably, the negative electrode material comprises from about 5 to 90 percent by weight nickel particles and from about 10 to 95 percent by weight tin particles, the nickel and tin particles being composed of discrete, non-spherical, smooth particles of a size ranging from about 1 to 10 micrometers and having a density which is greater than about 5 grams per milliter and a specific surface area of less than about 1 square meter per gram.
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