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US 2009/0155687 A1Published application
Composite anode active material, method of preparing the same, anode containing the composite anode active material, and lithium battery containing the composite anode active material
AssigneeSamsung SDI Co., Ltd.
InventorsDong-min IM, Seok-gwang Doo, Han-su Kim, Jin-hwan Park
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Abstract
A composite anode active material including: a metal capable of alloy formation with lithium; an intermetallic compound; and a solid solution, in which the solid solution is an alloy of the metal capable of alloy formation with lithium and the intermetallic compound, and the solid solution and the intermetallic compound have a same crystal structure.
Claims20
A composite anode active material, comprising:
- a metal capable of alloy formation with lithium;
- an intermetallic compound;
- and
- a solid solution which is an alloy of the metal capable of alloy formation with lithium and the intermetallic compound, the solid solution having a same crystal structure as the intermetallic compound.
1 more element
A method of preparing a composite anode active material, the method comprising:
- mechanically milling under an inert atmosphere active material components comprising a metal capable of alloy formation with lithium, an intermetallic compound, and a carbonaceous material;
- and
- heat-treating the mechanically milled active material components under an inert atmosphere at a temperature of 300 to 700° C. to form a solid solution in the composite anode active material, the solid solution being a crystalline structure of the metal capable of alloy formation with lithium and the intermetallic compound, and the crystalline structure being a same crystalline structure as the intermetallic compound.
Dependencies are inferred from the claim text.