Nanoscalar Silicon Particles In Negative Electrode Materials For Use In Lithium-Ion Batteries
First Claim
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1. :
- An electrode material for lithium ion batteries, characterized in 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 μ
m to 100 μ
m and 5-25% by weight of a binder, the proportions of the components summing to not more than 100% by weight.
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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 and 5-25% 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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13 Claims
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1. :
- An electrode material for lithium ion batteries, characterized in 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 μ
m to 100 μ
m and5-25% by weight of a binder, the proportions of the components summing to not more than 100% by weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- An electrode material for lithium ion batteries, characterized in that the electrode material comprises
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