Rational design of FeCo-Se@NiMn-LDH/NF heterostructure electrode materials for enhanced supercapacitor performance.

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Layered double hydroxides (LDHs) show potential for high-performance electrodes in aqueous energy storage.
• Current limitations include low specific capacitance and poor rate capability, hindering practical applications.

Purpose of the Study:

• To design and fabricate a novel FeCo-Se@NiMn-LDH heterostructure for enhanced supercapacitor performance.
• To overcome the limitations of traditional LDH materials.

Main Methods:

• Fabrication of a hierarchical FeCo-Se@NiMn-LDH heterostructure on nickel foam using electrodeposition and hydrothermal treatment.
• Characterization of the heterostructure's morphology, composition, and electrochemical properties.

Main Results:

• The heterostructure exhibits an interconnected porous architecture, facilitating ion diffusion and electron transport.
• The FeCo-Se@NiMn-LDH/NF electrode achieved an ultrahigh specific capacitance of 1867.6 F g^-1.
• The resulting supercapacitor demonstrated a remarkable energy density of 58.42 Wh kg^-1 at 800 W kg^-1.

Conclusions:

• The developed heterostructure effectively enhances charge storage kinetics and electrode stability.
• This approach offers a feasible strategy for engineering high-performance electrodes for advanced supercapacitors.
• The study paves the way for next-generation aqueous energy storage systems.