Porous nanosheet-nanosphere@nanosheet FeNi-LDH@FeNiS core-shell heterostructures for asymmetric supercapacitors.

Transition bimetallic sulphides have emerged as important electrode materials for supercapacitors owing to their low toxicity, environmental friendliness, cost-effectiveness, multiple oxidation states, high natural abundance, flexible structure, and high theoretical specific capacitance. Herein, a porous nanosheet-nanosphere@nanosheet FeNi-LDH@FeNiS (FNLDH@FNS) core-shell heterostructure was directly prepared on nickel foam (NF) a two-step hydrothermal method. The prepared electrode material exhibits an outstanding electrochemical performance.