Anode active material for lithium secondary battery and method of preparing the same
AssigneesSK On Co., Ltd., Unist (Ulsan National Institute of Science and Technology)
InventorsGwi Ok Park, Joon Sup Kim, Eun Jun Park, Jee Hee Lee, Jae Phil Cho
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Abstract
Provided are an anode active material for a lithium secondary battery and a method of preparing the same, wherein the anode active material for a lithium secondary battery includes a silicon-carbon composite including a porous carbon material and a silicon coating layer positioned on the porous carbon material; a metal compound layer positioned on the silicon-carbon composite and including a metal compound that is metal oxide, metal nitride, or a mixture thereof; and a carbon coating layer surrounding the silicon-carbon composite and the metal compound layer positioned on the silicon-carbon composite.
Claims14
An anode active material for a lithium secondary battery, comprising:
- a silicon-carbon composite including a porous carbon material and a silicon coating layer positioned on the porous carbon material;
- a metal compound layer positioned on the silicon-carbon composite and including a metal compound that is metal oxide, metal nitride, or a mixture thereof, and
- a carbon coating layer surrounding the metal compound layer positioned on the silicon-carbon composite,
- wherein the metal compound in the metal compound layer is in a form of nanoparticles having a size of 5 to 15 nm,
- wherein the anode active material comprises 20 to 70 parts by weight of the porous carbon material, 15 to 50 parts by weight of the silicon coating layer, 5 to 30 parts by weight of the metal compound, and 3 to 20 parts by weight of the carbon coating layer based on 100 parts by weight of the anode active material, and
- wherein the carbon coating layer is the outermost layer of the anode active material.
Dependencies are inferred from the claim text.