SnO2@reduced graphene oxide composite for high performance lithium-ion battery

SnO2@reduced graphene oxide nanocomposite (SGNC) was fabricated via a colloid electrostatic self-assembly process between the graphene oxide (GO) nanosheets and Sn(OH)(4) colloid nanoparticles (NPs), following a heat-treatment at 550 degrees C for 2 h under N-2. Transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM) showed the tiny multi-crystalline SnO2 NPs (<= 5 nm) dispersed onto reduced graphene oxide (rGO) sheets uniformly. The electrochemical properties of SGNC were investigated for a potential anode material in lithium-ion battery (LIB). SGNC showed a high specific capacity of 1710.8 mA h g(-1) in the initial discharge at current density of 100 mA g(-1). In comparison with the quick capacity fading upon extended cycling in pure SnO2 anode material, the capacity of 553.7 mA h g(-1) was still retained at current density of 500 mA g(-1) after 100 cycles. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.