Negative active material and lithium battery including the negative active material

摘要

A negative active material and a lithium battery including the negative active material. The negative active material includes a carbonaceous substrate with a plurality of recessed portions at its surface; and a silicon-based nanowire placed in each of the recessed portions. The negative active material provides the silicon-based nanowires with separate places to control volumetric expansion of the silicon-based nanowires, and thus, a lithium battery including the negative active material has improved efficiency and lifetime.

主权项

1. A negative active material, comprising:
a carbonaceous substrate with a plurality of recessed portions at its surface; and a silicon-based nanowire placed in each of the recessed portions, a length of each of the silicon-based nanowires being smaller than a depth of a corresponding recessed portion.