Synthesis and Electrochemical Properties of SnO2/C Nanocomposites

Abstract

The SnO2/C nanocomposites were prepared through a facile approach combining sol-gel synthesis with thermal reduction. The XRD, TG, (HR-) TEM, and electrochemical performance tests were used to study the relevance between the physical character and electrochemical properties of the electrode material. As the anode material, the results show that the SnO2/C nanocomposites delivered excellent lithium storage properties (539 mAh g–1 of 100th), compared with the bare SnO2 nanoparticles. It is demonstrated that the preparation of SnO2/C nanocomposites structured can effectively alleviate the particle pulverization caused by volume expansion, effectively shorten the diffusion distance of lithium ions, prevents the aggregation of SnO2 with the carbon layer, and improve the cycle stability of the electrode. Meanwhile, the incorporation of the SnO2 particles suppressed the stack of carbon layer.