SnS2 nanoflakes decorated multiwalled carbon nanotubes as high performance anode materials for lithium-ion batteries

SnS2 nanoflakes decorated multiwalled carbon nanotubes (MWCNTs) hybrid structures are directly synthesized via a simple solution-phase approach. The as-prepared SnS2/MWCNTs structures are investigated as anode materials for Li-ion batteries as compared with SnS2 nanoflakes. It has been found that the composite structure exhibit excellent lithium storage performance with a large reversible capacity, superior cycling performance, and good rate capability as compared to pure SnS2 nanoflakes. The first discharge and charge capacities have been found to be 1416 and 518 mA h g(-1) for SnS2/MWCNTs composite electrodes at a current density of 100 mA g(-1) between 5 mV and 1.15 V versus Li/Li+. A stable reversible capacity of similar to 510 mA h g(-1) is obtained for 50 cycles. The improved electrochemical performance may be attributed to the flake-morphology feature of SnS2 and the addition of MWCNTs that can hinder the agglomeration of the active materials and improve the conductivity of the composite electrode simultaneously. (C) 2013 Elsevier Ltd. All rights reserved.