Molybdenum Sulfide Selenide Nanosheets Synergized with Nitrogen‐Rich Carbon Frameworks toward High Performance and Stable Sodium Storage

Abstract Transition metal dichalcogenides attract much attention in fabricating advanced electrodes for sodium‐ion batteries. Herein, to improve electrochemical activity and structural stability and thus enhance sodium storage performances, molybdenum sulfide selenide (MoSSe) nanosheets synergized with nitrogen‐rich carbon nanoframeworks (NCNF@MoSSe) are constructed through a combination of hydrothermal technique and template method with (NH 4 ) 2 MoS 4 and Se powders as the reactants and N‐rich polypyrrole nanotubes as the template. On the one hand, nitrogen‐rich carbon nanoframeworks with high conductance and thermal stability can serve as an effective carrier for an ideal charge migration. On the other hand, compared to MoS 2 or MoSe 2 , MoSSe is a more desirable active material with smaller specific gravity and proper interlayer distance. The structural analyses demonstrate the strong core–shell combination and the good structural stability of the NCNF@MoSSe hybrids. As results, the NCNF@MoSSe hybrids can work as anode material with enhanced sodium storage properties and deliver a high specific capacity (502 mAh g −1 at 0.1 A g −1 ) as well as a good cyclic stability (323.3 mAh g −1 at 2.0 A g −1 after 700 cycles).