Self-Assembled Few-Layered MoS(2) on SnO(2) Anode for Enhancing Lithium-Ion Storage

SnO(2) nanoparticles (NPs) have been used as reversible high-capacity anode materials in lithium-ion batteries, with reversible capacities reaching 740 mAh·g(−1). However, large SnO(2) NPs do not perform well in charge–discharge cycling. In this work, we report the incorporation of MoS(2) nanosheet (NS) layers with SnO(2) NPs. SnO(2) NPs of ~5 nm in diameter synthesized by a facile hydrothermal precipitation method. Meanwhile, MoS(2) NSs of a few hundreds of nanometers to a few micrometers in lateral size were produced by top-down chemical exfoliation. The self-assembly of the MoS(2) NS layer on the gas–liquid interface was first demonstrated to achieve up to 80% coverage of the SnO(2) NP anode surface. The electrochemical properties of the pure SnO(2) NPs and MoS(2)-covered SnO(2) NP anodes were investigated. The results showed that the SnO(2) electrode with a single-layer MoS(2) NS film exhibited better electrochemical performance than the pure SnO(2) anode in lithium storage applications.