Patent ID: 9748562
Date: 2017-08-29
CPC Classifications: H01M,Y02E

Claim:
1. A negative active material comprising: graphite; silicon nanowires; and silicon nanoparticles, wherein the negative active material comprises about 0.001 weight percent to about 37.5 weight percent of the silicon nanoparticles, based on a total weight of the negative active material, wherein a silicon nanowire of the silicon nanowires and a silicon nanoparticle of the silicon nanoparticles are each disposed on an outer surface of a particle of the graphite to form a composite with the graphite, wherein a silicon nanoparticle of the silicon nanoparticles is disposed between a particle of the graphite and a silicon nanowire of the silicon nanowires, wherein the negative active material comprises about 0.1 weight percent to about 50 weight percent of the silicon nanowires, based on a total weight of the negative active material, and wherein an amount of the silicon nanoparticles is about 1 part by weight to about 75 parts by weight, based on 100 parts by weight of the silicon nanowires.