Composite anode active material, method of preparing the same, and anode and lithium secondary battery including the composite anode active material
First Claim
Patent Images
1. A composite anode active material comprising:
- a metal silicide core;
a silicon shell which surrounds an entirety of the metal silicide core; and
a metal nitride and a carbon material which are directly disposed on an outer surface of the silicon shell,wherein the metal silicide is TiSix (where, 0<
x≤
2).
3 Assignments
0 Petitions
Accused Products
Abstract
A composite anode active material includes a metal silicide core, a silicon shell, and a metal nitride and a carbon material that are dispersed in at least one surface of the silicon shell.
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Citations
15 Claims
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1. A composite anode active material comprising:
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a metal silicide core; a silicon shell which surrounds an entirety of the metal silicide core; and a metal nitride and a carbon material which are directly disposed on an outer surface of the silicon shell, wherein the metal silicide is TiSix (where, 0<
x≤
2). - View Dependent Claims (2, 3, 4, 5)
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6. A method of preparing a composite anode active material, the method comprising:
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milling a metal silicide; and heat-treating the milled metal silicide in a nitrogen atmosphere; and
combining the heat-treated resultant and a carbon material to obtain a combination and then milling the combination; and
whereinthe composite anode active material comprises;
a metal silicide core;a silicon shell which surrounds an entirety of the metal silicide core; and a metal nitride and a carbon material which are directly disposed on an outer surface of the silicon shell, wherein the metal silicide is TiSix (where, 0<
x<
or equal
2). - View Dependent Claims (7, 8)
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9. An anode comprising a composite anode active material, wherein the composite anode active material comprises:
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a metal silicide core; a silicon shell which surrounds an entirety of the metal silicide core; and a metal nitride and a carbon material which are directly disposed on an outer surface of the silicon shell, wherein the metal silicide is TiSix (where, 0<
x≤
2). - View Dependent Claims (10, 11, 12, 13, 14)
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15. A lithium secondary battery comprising an anode comprising a composite anode active material, wherein the composite anode active material comprises:
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a metal silicide core; a silicon shell which surrounds an entirety of the metal silicide core; and a metal nitride and a carbon material which are directly disposed on an outer surface of the silicon shell, wherein the metal silicide is TiSix (where, 0<
x≤
2).
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Specification