Microwave Synthesis of SnO2/Fe2O3 Nanocomposites for Lithium-Ion Batteries

Abstract

SnO2/Fe2O3nanocomposites were successfully synthesized by microwave heating. SEM-EDX and XRD analyses and Raman spectroscopy revealed that nanosized SnO2was deposited on rod-shaped α-Fe2O3crystals. The SnO2/Fe2O3nanocomposites worked as a rechargeable electrode material. The initial insertion capacity of the SnO2/Fe2O3nanocomposites achieved 1522 mAh/g that is larger than the theoretical capacity, and the rechargeable capacity at 10 cycles was 862 mAh/g. The initial charge-discharge reaction of the SnO2/Fe2O3nanocomposites was caused by the redox reactions of SnO2and Fe2O3and alloying-dealloying reaction of Sn with Li.