SnO2/super P nanocomposites as anode materials for Na-ion batteries with enhanced electrochemical performance

Super P was firstly used to enhance the electrochemical performance of SnO2 as anode in Na-ion battery. This composite was prepared by a simple hydrothermal method, exhibiting uniformly dispersed SnO2 nanoparticles on the super P carbon spheres. The SnO2/C nanocomposite could deliver a discharge capacity of 293 mAh g(-1) after 100 cycles at a current density of 50 mA g(-1). Even at 1000 mA g(-1), a capacity of 150 mAh g(-1) was still maintained. Further study found that SnO2/super P nanocomposite provided a high Na ion diffusion coefficient and good structural stability during the cycling test. Combining the advantages of low cost and environmental benignity suggest the SnO2/super P composites in this work have great potential as a promising anode for high performance Na-ion battery. (C) 2015 Elsevier B.V. All rights reserved.