Patent ID: 9178213
Filing Date: 2015-11-03
Classification: H01M,Y02E,Y10T

Abstract:
1. A negative active material comprising silicon-based primary particles that are composed of crystalline silicon having a Raman shift in a range of 500 to 510 cm −1 measured by Raman spectroscopy and that has an average particle size of about 100 to about 500 nm, wherein the silicon-based primary particles are Si, Si—Z alloy (where Z is at least one selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Sc, Y, La, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Tc, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, B (boron), Ge, P (phosphorus), As, Sb, Bi, S, Se, Te, and Po), or a combination thereof.