Si/Cu-Zn(ox)/C composite as anode material for Li-ion batteries

The silicon based composite Si/Cu-Zn(ox)/C was prepared by ball milling from Si microparticles, Cu-Zn nanopowder heated at air and carbon black. is formed submicrometer particles, Cu-rich CuxZn, CuO, ZnO C nanoparticles. two oxides are electrochemically active during the first discharge, improving nanostructuration of providing Cu nanoparticles that enhance electronic conductivity with CuxZn C. helps to buffer volume variations due Li-Si alloying reactions cycling. further nanostructured cycles as shown XRD electrochemical measurements. material tested anode for Li-ion batteries, a reversible capacity 800 mAh.g−1 100 current 300 mA.g−1 good rate capability. mainly stable after few while solid electrolyte interphase stabilized about ten impedance spectroscopy.