Hierarchical MnS2-MoS2 nanotubes with efficient electrochemical performance for energy storage

Abstract

Novel hierarchical nanosheet-based MnS2-MoS2 nanotubes are facile fabricated through a one-step hydrothermal method using the MnO2 nanorods as growth template. The (NH4)2MoS4 provides not only sulfur source to react with MnO2 but also the MoS2 precursor. The interconnected MoS2 nanosheets grow upright on the nanosheet-built MnS2 nanotube, leading to the hybrid MnS2-MoS2 hierarchical nanotubes. Moreover, this architecture affords numerous pores with large surface area, high conductivity and excellent structure stability, enabling the superior electrochemical energy storage performance. Even at high current density of 20 A g−1, the hierarchical MnS2-MoS2 nanotubes exhibit specific capacitance of 167.9 F g−1. After 6000 charge-discharge cycles at 16 A g−1, the capacitance can be as high as 87.7% of the initial capacitance, validating the superior cycling durability.