High Capacity of SnO2 Nanoparticles Decorated Graphene as an Anode for Lithium-Ion Batteries

We develop a novel approach to prepare tin oxide (SnO2)/graphene composite as an anode material for lithium ion batteries mainly through an oxidation-reduction reaction between graphene oxide (GO) and SnCl2 center dot 2H(2)O, as well as the promotion and neutralization effect of urea. The SnO2/graphene composite exhibits outstanding Li-battery performance with large reversible capacity and high rate capacity. The first discharge and charge capacities are 2751.4 mAh . g(-1) and 1254.6 mAh . g(-1) at the density of 100 mA . g(-1). After 30 cycles, the reversible discharge capacity still remains at 985.5 mAh . g(-1). The prepared products can be a promising alternative anode material used for high-storage lithium ion batteries. (C) 2013 The Electrochemical Society. [DOI: 10.1149/2.001306ssl] All rights reserved.