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US 2016/0365572 A1Published application
Composite for anode active material, anode including the composite, lithium secondary battery including the anode, and method of preparing the composite
AssigneesSamsung Electronics Co., Ltd., Samsung SDI Co., Ltd.
InventorsJinsoo Mun, Gyusung Kim, Heechul Jung, Junho Park
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Abstract
A composite anode active material includes: a silicon anode active material, a metal nitride; and a metal fluoride, wherein the metal nitride and the metal fluoride are each independently disposed on at least one surface of the silicon anode active material.
Claims27
A composite anode active material comprising:
- a silicon anode active material comprising silicon;
- a metal nitride;
- and
- a metal fluoride,
- wherein the metal nitride and the metal fluoride are each independently disposed on at least one surface of the silicon anode active material.
2 more elements
A method of preparing a composite anode active material, the method comprising:
- milling a metal silicide;
- heat-treating the milled metal silicide in a nitrogen atmosphere to form a heat-treated metal silicide comprising a metal nitride on a surface thereof;
- and
- contacting the heat-treated metal silicide with a metal fluoride to dispose the metal fluoride on a surface of the heat-treated metal silicide and to form a coating comprising the metal fluoride on the surface of the heat-treated metal silicide to prepare the composite anode active material.
1 more element
A method of preparing a composite anode active material, the method comprising:
- contacting a core comprising silicon and a metal nitride to form a coating of the metal nitride on a surface of the core to form a surface-treated core;
- and
- contacting the surface-treated core with a metal fluoride to dispose the metal fluoride on the surface-treated core to prepare the composite anode active material,
- wherein the metal nitride and the metal fluoride are each independently disposed on a surface of the core.
1 more element
Dependencies are inferred from the claim text.