Hierarchically Porous Wearable Composites for High-Performance Stretchable Supercapacitors.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Growing demand for flexible, durable energy storage in wearable electronics.
• Challenges in maintaining electrochemical stability during mechanical deformation (stretching).

Purpose of the Study:

• To develop novel stretchable supercapacitors with enhanced electrochemical performance and mechanical stability.
• To explore the use of carbon nanotube (CNT) and styrene-butadiene-styrene (SBS) composites for flexible energy storage.

Main Methods:

• Fabrication of CNT/SBS composite scaffolds on pre-stretched carbon fabrics using the breath figure method.
• Hydrothermal growth of Nickel Cobalt Layered Double Hydroxide (NiCo-LDH) on the composite scaffolds.
• Characterization of the hierarchically porous structure and electrochemical properties.

Main Results:

• Supercapacitors exhibit 94% capacitance retention under 80% tensile strain.
• Achieved a specific capacitance of 4948 mF cm⁻² at 2 mA cm⁻² with minimal degradation over 20,000 cycles.
• Demonstrated high energy density (801.6 µWh cm⁻²) and power density (3.5 mW cm⁻²).

Conclusions:

• The developed stretchable supercapacitors offer excellent electrochemical performance and mechanical robustness.
• The hierarchical porous structure and NiCo-LDH integration are key to enhanced properties.
• These devices show significant potential for next-generation smart wearables and electronics.