Facile synthesis of hierarchical Ni₇S₆ and Co(ii)-doped Ni₇S₆ flower structures for high-performance supercapacitors

Abstract

The as-prepared flower-like Ni7S6 structure with abundant surface active sites demonstrated good supercapacitor performance in an alkaline solution.

MOF-Derived Nickel–Cobalt Sulfide Nanoflakes Wrapped Carbon Nanotubes for Hybrid Supercapacitors

“…3−7 Among them, due to the effective synergistic effect between nickel and cobalt, nickel−cobalt-based binary metal sulfide has abundant active sites and high redox activity, which makes it have considerable potential in the application of supercapacitors. 8−12 To further enhance the overall performance, bimetallic sulfides with various morphologies were synthesized as electrode materials, such as rambutan-like, 13 nanosheets, 14,15 nanoflowers, 16,17 urchin-like, 18,19 etc. In recent years, metal− organic framework (MOF) materials have been regarded as the optimal precursor materials for bimetallic sulfides due to their controllable structure and abundant porosity.…”

“…A supercapacitor is a new type of energy storage device, which has the advantages of high energy density, high power density, and fast charging and discharging. In order to better satisfy the actual demand, researchers have been aiming at developing superior electrode materials to improve the electrochemical performance of supercapacitors. , Due to the low electronegativity and high electrochemical activity, transition metal compounds have excellent electron transfer efficiency and rapid redox reaction during charge and discharge, which has led to their considerable attention in energy storage. − Among them, due to the effective synergistic effect between nickel and cobalt, nickel–cobalt-based binary metal sulfide has abundant active sites and high redox activity, which makes it have considerable potential in the application of supercapacitors. − To further enhance the overall performance, bimetallic sulfides with various morphologies were synthesized as electrode materials, such as rambutan-like, nanosheets, , nanoflowers, , urchin-like, , etc. In recent years, metal–organic framework (MOF) materials have been regarded as the optimal precursor materials for bimetallic sulfides due to their controllable structure and abundant porosity. − …”