Invention Grant
US08999581B2 Negative active material for lithium secondary battery, method for preparing the same, negative electrode comprising the same, and lithium secondary battery comprising same 有权
锂二次电池用负极活性物质,其制造方法,含有该负极的负极和包含该负极的锂二次电池

Negative active material for lithium secondary battery, method for preparing the same, negative electrode comprising the same, and lithium secondary battery comprising same
Abstract:
The present invention relates to a negative active material for a rechargeable lithium battery, a method of manufacturing the negative active material, and a rechargeable lithium battery including the negative active material. The negative active material includes a sphere-shaped first graphite particle that a first particle precursor, a flake-shaped graphite piece, is linked to each other; and at least one second particle dispersed between the flake-shaped graphite pieces inside the sphere-shaped first graphite particle and selected from the group consisting of at least one element particle selected from the group consisting of Si, Sn, Al, Ge, Pb, and combinations thereof; at least one element compound particle selected from the group consisting of Si, Sn, Al, Ge, Pb, and combinations thereof; a composite particle including at least one element selected from the group consisting of Si, Sn, Al, Ge, Pb, and combinations thereof; a carbon composite particle including at least one element selected from the group consisting of Si, Sn, Al, Ge, Pb, and combinations thereof; and a combination particle thereof.
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