Properties of silicon/graphite/carbon anode for Li-ion battery

Abstract:

Silicon/graphite/carbon composite was prepared by high temperature pyrolysis and used as the anode of Li-ion battery.The structure and electrochemical properties were characterized by X-ray diffraction(XRD),cyclic voltammetry(CV) and constant current charge-discharge methods.Also,the effects of heating treatment and different binder on electrochemical cycleability were studied,and the results showed that both of the aqueous binder and heating treatment could improve the electrochemical properties and the cycle stability.The optimized anode delivered initial reversible capacity of 970.5 mAh/g and remained 822.1 mAh/g after 40 cycles,which demonstrated high cycle stability.