Construction of MoS/C Hierarchical Tubular Heterostructures for High-Performance Sodium Ion Batteries.

Molybdenum disulfide (MoS) has been considered to be a promising anode material for sodium ion batteries (SIBs), because of its high capacity and graphene-like layered structure. However, irreversible conversion reaction during the sodiation/desodiation process is a major problem that must be overcome before its practical applications. In this work, MoS/amorphous carbon (C) microtubes (MTs) composed of heterostructured MoS/C nanosheets have been developed via a simple template method. The existence of MoS/C heterointerface plays a key role in achieving high and stable performance by stabilizing the reaction products Mo and sulfide phases, providing fast electronic and Na ions diffusion mobility, and alleviating the volume change. MoS/C MTs exhibit a high reversible specific capacity of 563.5 mA h g at 0.2 A g, good rate performance (520.5, 489.4, 452.9, 425.1, and 401.3 mA h g at 0.5, 1.0, 2.0, 5.0, and 10.0 A g, respectively), and excellent cycling stability (484.9 mA h g at 2.0 A g after 1500 cycles).