Multidimensional Heterostructure Sn-Based (SnO2/MoS2)@C Composites as Superior Anode Material for Lithium-Ion Batteries

Sn-based composites are promising anode materials for Li-ion batteries (LIBs) due to its high theoretical specific capacity. However, the large volume expansion during lithiation, poor conductivity and poor stability limit their practical applications as anodes of LIBs. Herein, (SnO2/MoS2)@C composites with 0D/1D/2D multidimensional microstructures are successfully prepared via successive two-step hydrothermal reactions with a subsequent multi-coating modification and pyrolysis. Due to the structural integrity, interconnected conductive paths, and synergistic effect between the MoS2 nanosheets and SnO2 nanoparticles, the (SnO2/MoS2)@C composite shows excellent electrochemical performance as anode for LIBs. The composite is able to deliver high reversible capacities of 953.4, 797.9, 758.3, 711.9, and 658.6 mAh g(-1) at current densities of 0.1, 0.2, 0.5, 1, and 2 A g(-1), respectively. Furthermore, it also demonstrates good cyclic performance at 0.2 A g(-1).