Nanoscalar silicon particles in negative electrode materials for use in lithium-ion batteries
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United States of America Patent
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Feb 28, 2012
Grant Date -
Dec 6, 2007
app pub date -
Mar 17, 2005
filing date -
Apr 1, 2004
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Abstract
The invention relates to an electrode material for a lithium ion battery which is distinguished by the fact that the electrode material comprises
- 5-85% by weight of nanoscale silicon particles which have a BET surface area of from 5 to 700 m2/g and a mean primary particle diameter of from 5 to 200 nm,0-10% by weight of conductive carbon black,5-80% by weight of graphite having a mean particle diameter of from 1 μm to 100 μm and5-25% by weight of a binder,the proportions of the components summing to not more than 100% by weight, and to the use of the electrode material according to the invention for the production of lithium ion batteries, and to a lithium ion battery having a negative electrode which comprises the electrode material according to the invention.
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