Charge Transfer Salt and Graphene Heterostructure-Based Micro-Supercapacitors with Alternating Current Line-Filtering...

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• Miniaturization of electronics demands smaller, efficient components.
• Current aluminum electrolytic capacitors (AECs) are bulky and limit device flexibility.
• AC line filters are crucial for managing AC ripples in electronic devices.

Purpose of the Study:

• To develop a compact, high-performance micro-supercapacitor for AC line filtering.
• To explore graphene and charge transfer salts for advanced capacitor applications.
• To overcome the limitations of traditional capacitors in wearable electronics.

Main Methods:

• A facile laser-assisted fabrication approach was employed.
• In-plane micro-supercapacitors were constructed using graphene and charge transfer salt heterostructures.
• Electrochemical performance was evaluated using gel electrolyte (H2SO4/PVA).

Main Results:

• The micro-supercapacitors achieved a phase angle of 73.2° at 120 Hz.
• A high specific capacitance of 151 µF cm⁻² was recorded.
• Excellent stability (>98% capacitance retention after 10,000 cycles) and a fast scan rate (1000 V s⁻¹) were demonstrated.

Conclusions:

• The developed micro-supercapacitors exhibit electrochemical performance comparable to AECs.
• These devices represent a next-generation solution for AC line filtering in miniaturized electronics.
• The laser-assisted fabrication offers a scalable method for producing flexible, high-performance energy storage devices.