Cellulose aerogel-based copper oxide/carbon composite for supercapacitor electrode

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Carbon composites are promising electrode materials for supercapacitors.
• Improving the energy density of supercapacitors remains a critical challenge.
• High specific surface area materials are essential for enhanced electrochemical performance.

Purpose of the Study:

• To synthesize novel copper oxide/carbon composites for supercapacitor applications.
• To enhance the energy density and capacitance retention of electrode materials.
• To investigate the performance of these composites in asymmetric supercapacitors.

Main Methods:

• Preparation of copper oxide/carbon composites using cellulose aerogel loaded with copper salts (copper sulfate).
• Characterization of the composite material's specific surface area and electrochemical properties.
• Assembly and testing of an asymmetric supercapacitor using the composite as the positive electrode.

Main Results:

• The copper oxide/carbon composite electrode achieved a specific capacitance of 1001 F g^-1 at 2 A g^-1.
• A high energy density of 139.0 W h kg^-1 was recorded.
• Excellent capacitance retention of 98.06% after 500 cycles was demonstrated.

Conclusions:

• The developed copper oxide/carbon composite is a highly effective electrode material for supercapacitors.
• The material offers a viable solution for increasing supercapacitor energy density and stability.
• The asymmetric supercapacitor demonstrated good performance with a specific capacitance of 125 F g^-1 at 0.1 A g^-1.