Flexible All-Solid-State Supercapacitors based on Liquid-Exfoliated Black-Phosphorus Nanoflakes

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Flexible electronics require advanced energy storage solutions.
• All-solid-state supercapacitors offer enhanced safety and form factor advantages.
• Black phosphorus (BP) is a promising material for electrochemical applications due to its unique properties.

Purpose of the Study:

• To fabricate flexible all-solid-state supercapacitors using black-phosphorus (BP) nanoflakes.
• To evaluate the electrochemical performance of BP-based supercapacitors.
• To demonstrate the potential of BP as a flexible electrode material.

Main Methods:

• Liquid exfoliation of black phosphorus to obtain nanoflakes.
• Fabrication of flexible all-solid-state supercapacitors with BP electrodes.
• Electrochemical characterization including capacitance, power density, energy density, and cycling stability measurements.

Main Results:

• Achieved high specific volumetric capacitance (13.75 F cm⁻³).
• Delivered high power density (8.83 W cm⁻³) and energy density (2.47 mW h cm⁻³).
• Demonstrated outstanding long cycle life (>30,000 cycles).

Conclusions:

• Liquid-exfoliated BP nanoflakes are excellent electrode materials for flexible supercapacitors.
• The developed devices exhibit superior electrochemical performance and durability.
• BP shows significant potential for next-generation flexible electrochemical energy-storage devices.