MoO2-MoS2 composite coated with polyaniline as an anode material for high-performance lithium ion batteries.

The heterostructured arrangement of metal sulfide/oxide is of paramount importance in dictating the electrochemical characteristics of anode materials for lithium-ion batteries (LIBs). In this investigation, a synthesized composite material, integrating molybdenum disulfide (MoS₂) and molybdenum dioxide (MoO₂) intercalated within polyaniline (PANI) under hydrothermal conditions, was employed. Within the granulated MoO₂-MoS₂@PANI composite, PANI acts as an efficacious matrix, effectively mitigating the re-agglomeration and pulverization of MoS₂-MoO₂ during prolonged cycling processes. Concomitantly, the cooperative effects among the MoS₂, MoO₂, and PANI constituents manifest in copious active sites and shortened ion transport pathways. As an anode material for LIBs, the MoO₂-MoS₂@PANI sample exhibits exemplary cycling performance, delivering a remarkable capacity of 860 mAh g⁻¹ even after enduring 500 cycles at a rate of 0.1 A g⁻¹. Furthermore, when scrutinized in a sodium-ion battery (LIB) at a rate of 2 A g⁻¹, it demonstrates exceptional cycling performance, retaining a capacity of 490 mAh g⁻¹ even after 1000 cycles. [ABSTRACT FROM AUTHOR]