Harnessing enhanced stability and high-rate capability in lithium-ion batteries using synergistic SnS2/MoS2 2D nanostructures with optimized conversion/alloying reactions

Recently, there has been a significant interest in the application of SnS2/MoS2 2D nanostructure composites in lithium-ion batteries (LIBs) due to their advantageous conversion, intercalation, and alloying reactions, leading to high capacity during charge and discharge cycles. In this study, we successfully synthesized SnS2/MoS2 composites with a 2D-nanoplate morphology using a single-step hydrothermal method. Specifically, the optimized SnS2/MoS2-3:1 composite was tested as anodes in coin cell LIBs, demonstrating an impressive capacity of 710 mAh/g at a current density of 500 mA/g, along with outstanding stability (800 cycles) and remarkable rate capability compared to other composites. The excellent electrochemical performance of the SnS2/MoS2-3:1 composite can be attributed to the moderately coupled SnS2 and MoS2 2D-nanosheets, which provide short lithium-ion transportation lengths, low charge transfer resistance, and dominant capacitive behavior.