Multicomponent Co₂O₃@CoMo₂S₄ Core-Shell Structures as a Binder-Free Electrode for Cycling Stability Supercapacitors

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Transitional bimetallic sulfides are promising for energy storage due to redox activity and cost-effectiveness.
• Challenges include low energy density and poor rate performance, limiting their practical application.

Purpose of the Study:

• To develop an advanced core-shell structure for supercapacitors using transitional bimetallic sulfides.
• To enhance the electrochemical performance and energy density of supercapacitors.

Main Methods:

• Synthesized a Co2O3@CoMo2S4 core-shell structure as a conductive framework.
• Fabricated and tested supercapacitors utilizing the novel core-shell material.

Main Results:

• The Co2O3@CoMo2S4 core-shell structure achieved a high specific capacitance of 4951.8 F g-1 at 1 A g-1.
• Demonstrated excellent cyclic stability with 90.85% retention after 5500 cycles.
• The resulting supercapacitor exhibited an energy density of 41.66 Wh kg-1 and a power density of 0.35 kW kg-1.

Conclusions:

• The Co2O3@CoMo2S4 core-shell structure significantly improves supercapacitor performance compared to traditional bimetallic sulfides.
• This research provides a viable pathway for developing high-performance supercapacitors using advanced core-shell materials.