3D skeleton nanostructured Ni3S2/Ni foam@RGO composite anode for high-performance dual-ion battery

摘要

The growing global demands of safe,low-cost and high working voltage energy storage devices trigger strong interests in novel battery concepts beyond state-of-art lithium-ion battery.Herein,a dualion battery based on nanostructured Ni3S2/Ni foam@RGO(NSNR)composite anode is developed,utilizing graphite as cathode material and LiPF6-VC-based solvent as electrolyte.The battery operates at high working voltage of 4.2–4.5 V,with superior discharge capacity of-90 m A h g^-1 at 100 mA g^-1,outstanding rate performance,and long-term cycling stability over 500 cycles with discharge capacity retention of-85.6%.Moreover,the composite simultaneously acts as the anode material and the current collector,and the corrosion phenomenon can be greatly reduced compared to metallic Al anode.Thus,this work represents a significant step forward for practical safe,low-cost and high working voltage dual-ion batteries,showing attractive potential for future energy storage application.