One-step synthesis and energy-storage application of Ni–Se–S/nickel foam nanoarrays with high areal specific capacitance

摘要: Multi-element compound nanomaterials with unique physicochemical properties have the promising prospect in field of supercapacitors. However, multi-anionic compounds are rarely investigated compared to multi-cationic compounds. Therefore, a serial Ni–Se–S nanorods rooted nickel foams successfully synthesized by one-step solvothermal method rather than ion exchange approach. Structural characterizations indicate that these ternary different chemical composition form ordered nanoarray structure. Electrochemical experimental results Ni3(Se0.3S0.7)2/nickel foam nanoarrays optimal properties, i.e.: high areal specific capacitance 13.50 F cm−2, better rate capability controlled compounds, and good cycle stability.These excellent result from array structure, heterozygous chalcogen atoms, significant synergistic effect, conductivity. More importantly, novel battery–capacitor hybrid supercapacitors assembled based on active carbon. This device has energy density 0.50 mWh 81.96% retention after 10,000 cycles, potential commercial value. All outstanding demonstrate very for advanced energy-storage devices.