Description
Date/Time: 04-03-2018 - Tuesday - 05:00 PM - 07:00 PM
Chen Chen1 Olabode Oladel1 Fei Yan1 Yongan Tang1

1, North Carolina Central University, Durham, North Carolina, United States

A layered SnS2 /reduced graphene oxide (SnS2/RGO) composite is prepared by a facile, one-step microwave-assisted method, and evaluated as an anode material for sodium-ion batteries (SIBs). The influence of the ratio of Sn4+ to RGO on the composition, micro-structure and morphology of products, doping effect of other atoms (e.g., cobalt), as well as its electrochemical performance as an anode material of Na-ion batteries was systematically investigated. The as-prepared SnS2/RGO composite exhibits an excellent reversible capacity of 703 mAh g-1 after 50 cycles under a current density of 50 mA g-1, whereas SnS2 particles show a capacity below 150 mAh g-1 after the 2nd cycle. The kinetics of the sodiation/desodiation for SnS2/RGO was also studied. The accelerated Na+ kinetics is believed to be beneficial to the electrochemical performance, especially the rate performance of the anode materials. When the current density is increased to 2A g-1, the SnS2/RGO still keeps a high capacity of 300 mAh g-1. This work demonstrates an efficient method to grow SnS2 nanocrystals directly on graphene substrate, which can be used to prepare various kinds of layered metal dichalcogenides/RGO composites as high-performance anode materials for SIBs.

Meeting Program
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5:00 PM–7:00 PM Apr 3, 2018

PCC North, 300 Level, Exhibit Hall C-E