Compositions – Electrically conductive or emissive compositions – Metal compound containing
Reexamination Certificate
2008-09-16
2008-09-16
Kopec, Mark (Department: 1796)
Compositions
Electrically conductive or emissive compositions
Metal compound containing
C429S218100, C429S232000
Reexamination Certificate
active
11797114
ABSTRACT:
There are provided an electrode material for a lithium secondary battery which comprises alloy particles comprising silicon as a major component and having an average particle diameter of 0.02 μm to 5 μm, wherein the size of a crystallite of the alloy is not less than 2 nm but no more than 500 nm and an intermetallic compound containing at least tin is dispersed in a silicon phase and an electrode material for a lithium secondary battery which comprises alloy particles comprising silicon as a major component and having an average particle diameter of 0.02 μm to 5 μm, wherein the size of a crystallite of the alloy is not less than 2 nm but no more than 500 nm and an at least one intermetallic compound containing at least one element selected from the group consisting of aluminum, zinc, indium, antimony, bismuth and lead is dispersed in a silicon phase. Thereby, an electrode material for a lithium secondary battery, an electrode structure comprising the electrode material and a secondary battery comprising the electrode structure are provided in which a drop in capacity due to repeated charging/discharging is small, and the charge/discharge cycle life is improved.
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Asao Masaya
Kawakami Soichiro
Ogura Takao
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