Flexible Membranes of MoS ₂/C Nanofibers by Electrospinning as Binder-Free Anodes for High-Performance Sodium-Ion Batteries

Abstract

A flexible membrane consisting of MoS ₂/carbon nanofibers has been fabricated by a simple electrospinning method. MoS ₂ nanosheets are uniformly encapsulated in the inter-connected carbon nanofibers with diameters of ~150 nm. When evaluated as a binder-free electrode for sodium-ion batteries, the as-obtained electrode demonstrates high performances, including high reversible capacity of 381.7 mA h g ⁻¹ at 100 mA g ⁻¹ and superior rate capability (283.3, 246.5 and 186.3 mA h g ⁻¹ at 0.5, 1 and 2 A g ⁻¹, respectively). Most importantly, the binder-free electrode made of MoS ₂ and carbon nanofibers can still deliver a charge capacity of 283.9 mA h g ⁻¹ after 600 cycles at a current density of 100 m A g ⁻¹, indicating a very promising anode for long-life SIBs.