Pyrrolic nitrogen-doped carbon sandwiched monolayer MoS₂ vertically anchored on graphene oxide for high-performance sodium-ion battery anodes

In this work, a novel pyrrolic nitrogen-doped carbon sandwiched monolayer MoS₂ hybrid was prepared. This sandwiched hybrid vertically anchors on graphene oxide as anode materials for sodium-ion batteries. Such electrode was fabricated by facile ionic liquid-assisted reflux and annealing methods. Owing to rational structure and enhancement from pyrrolic nitrogen dopant, this unique MoS₂/C-graphene hybrid exhibits reversible specific capacity of 486 mAh g⁻¹ after 1000 cycles with a low average fading capacity of 0.15 mAh g⁻¹ (fading cyclic rate of ca. 0.03% per cycle). A capacity of 330 mAh g⁻¹ is remained at the current densities of 10.0 A g⁻¹. The proposed strategy provides a convenient way to create new pyrrolic nitrogen-doped hybrids for energy field and other related applications.