Ultra-long cycle life of sodium-ion batteries in VS4-G nanocomposite structure

Herein, we report that the vanadium sulfide (VS4) nanosheets were stacked on reduced graphene oxide (RGO) nanocomposite (marked as VS4-G) synthesized by facile hydrothermal method. The as-prepared VS4-G nanocomposite demonstrated a stable capacity of about 463 mAh g (1) at 100 mA g (1) up to 100 cycles and ultra-long cycling life (700 cycles) for sodium-ion batteries (SIBs). A good performance because that this stacked composite nanosheets structure is very favorable for the infiltration and dispersion of electrolyte. (C) 2017 Elsevier B.V. All rights reserved.