MXene-decorated SnS2/Sn3S4 hybrid as anode material for high-rate lithium-ion batteries

Abstract

The combination of transitional metal dichalcogenides with MXene is an effective strategy to explore high-performance anode materials for lithium-ion batteries (LIBs). In this work, SnS2/Sn3S4 hybrid decorated on Ti3C2 MXene (S-TC) was prepared through a facile solvothermal and calcination process. The multi-layered Ti3C2 matrix improves the electron transport capability, inhibits the aggregation and accommodates the volume change of SnS2/Sn3S4 hybrid, while the SnS2/Sn3S4 hybrid confined in the multilayer stacks serves as a spacer to decrease the tendency of layer restacking and improves the limited capacities of Ti3C2. Besides, the nano-sized SnS2/Sn3S4 hybrid with high specific surface area also enhances the contact between electrolyte and electrode. When used as anode for LIBs, S-TC demonstrates a good cycling stability (462.3 mAh g−1 at 100 mA g−1 after 100 cycles) and superior rate performance (216.5 mAh g−1 at 5000 mA g−1). The strategy in this work should provide a new insight into fabricating novel MXene-based anode material for high-rate LIBs.