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

Abstract

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 518mAhg−1 for SnS2/MWCNTs composite electrodes at a current density of 100mAg−1 between 5mV and 1.15V versus Li/Li+. A stable reversible capacity of ∼510mAhg−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.