Interfaced FeS/g-C₃N₄ hybrid material for charge transport in supercapacitors

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Transition metal sulfides are promising for supercapacitors due to redox chemistry and high capacitance.
• Combining sulfides with carbon materials enhances electrochemical properties.
• FeS/g-C3N4 nanocomposite fabrication is explored for improved energy storage.

Purpose of the Study:

• To synthesize and characterize a FeS/g-C3N4 nanocomposite for supercapacitor applications.
• To investigate the synergistic effects of FeS and g-C3N4 on electrochemical performance.
• To evaluate the specific capacitance, stability, and energy/power densities of the FeS/g-C3N4 electrode.

Main Methods:

• Fabrication of FeS nanoparticles anchored on a g-C3N4 framework.
• Electrochemical characterization including cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy.
• Long-term cycling stability tests over 5000 cycles.

Main Results:

• The FeS/g-C3N4 electrode achieved a high specific capacitance of 802.5 F g-1 at 1 A g-1.
• The electrode exhibited excellent cycling stability with 72.34% capacitance retention after 5000 cycles.
• Exceptional energy density (17.83 Wh kg-1) and power density (1.0 kW kg-1) were recorded.

Conclusions:

• The FeS/g-C3N4 nanocomposite shows enhanced charge transfer and structural stability.
• The synergistic effect between FeS and g-C3N4 boosts redox activity and reduces internal resistance.
• FeS/g-C3N4 is a viable material for high-performance, long-term supercapacitor electrodes.