Composite anode active material, anode and lithium battery comprising the material, and method of preparing the same

摘要

A composite anode active material, an anode and a lithium battery each including the composite anode active material, and a method of preparing the composite anode active material. The composite anode active material includes a composite core, and a coating layer covering at least a region of the composite core, wherein the composite core includes a carbonaceous substrate and a metal/semi-metal nanostructure on the carbonaceous substrate, the coating layer is more predominant on the nanostructure than on the carbonaceous substrate, and the coating layer includes a metal oxide.

主权项

1. A composite anode active material comprising:
a composite core, wherein said composite core comprises a carbonaceous substrate and a nanostructure having a cross-sectional diameter of from about 1 nm to about 500 nm on the carbonaceous substrate, wherein the nanostructure is nanowires, nanotubes, nanobelts, nanorods, a nanoporous body, or nanotemplates; and a coating layer formed on the composite core, wherein said coating layer comprises a metal oxide, wherein the coating layer on the nanostructure is thicker than that on the carbonaceous substrate.