NEGATIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING THE SAME, NEGATIVE ELECTRODE COMPRISING THE SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

摘要

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 first graphite particle including graphite pieces; and at least one second particle selected from the group consisting of an element particle, an element compound particle, a composite particle, and a carbon composite particle, and a combination particle thereof, wherein the element particle, the element compound particle, the composite particle, and the carbon composite particle are selected from the group consisting of Si, Sn, Al, Ge, Pb, and combinations thereof; wherein each of the graphite pieces has a thickness ranging from 0.01 μm to 0.1 μm and the graphite pieces are linked to one another forming a curved side; and wherein the at least one second particle is dispersed between the graphite pieces.

主权项

1. A negative active material for a rechargeable lithium battery comprising:
a first graphite particle including graphite pieces; and at least one second particle selected from the group consisting of an element particle, an element compound particle, a composite particle, and a carbon composite particle, and a combination particle thereof, wherein the element particle is selected from the group consisting of Si, Sn, Al, Ge, Pb, and combinations thereof; the element compound particle is selected from the group consisting of Si, Sn, Al, Ge, Pb, and combinations thereof; the composite particle including at least one element selected from the group consisting of Si, Sn, Al, Ge, Pb, and combinations thereof; and the carbon composite particle including at least one element selected from the group consisting of Si, Sn, Al, Ge, Pb, and combinations thereof; wherein each of the graphite pieces has a thickness ranging from 0.01 μm to 0.1 μm and the graphite pieces are linked to one another forming a curved side; and wherein the at least one second particle is dispersed between the graphite pieces.