Direct Assembly of 3D-BCN Microspheres as a Microsupercapacitor Electrode for Wearable Energy Storage

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Developing advanced electrode materials is crucial for high-performance energy storage devices.
• Boron carbon nitride (BCN) materials offer unique properties for electrochemical applications.
• Microsupercapacitors require scalable fabrication methods and robust performance.

Purpose of the Study:

• To demonstrate a scalable and cost-effective method for fabricating 3D boron carbon nitride (BCN) microspheres.
• To fabricate and characterize an all-printed solid-state flexible microsupercapacitor (MSC) using 3D-BCN-4 as the electrode material.
• To evaluate the electrochemical performance and mechanical flexibility of the fabricated MSCs.

Main Methods:

• Hydrothermal and annealing methods were employed for the synthesis of 3D-BCN microspheres.
• Screen printing was utilized for the fabrication of solid-state flexible microsupercapacitors.
• Electrochemical performance was assessed through capacitance measurements, cycling stability tests, and energy/power density calculations.

Main Results:

• The synthesized 3D-BCN-4 microspheres exhibited a high specific surface area (1390.12 m²/g) and hierarchical pore structure.
• The fabricated MSCs achieved a high areal capacitance of 41.6 mF/cm².
• The devices demonstrated remarkable mechanical flexibility with 93.3% capacitance retention after 1000 cycles and a maximum energy density of 0.00832 mW h/cm².

Conclusions:

• A facile and effective method for synthesizing 3D-BCN microspheres with excellent electrochemical properties was established.
• The developed 3D-BCN-based MSCs show promising potential for wearable energy storage applications.
• The combination of high performance and mechanical flexibility makes these materials attractive for next-generation flexible electronics.