Electrospun Polymer-Derived Carbyne Supercapacitor for Alternating Current Line Filtering

Area of Science:

• Materials Science
• Electrical Engineering
• Electrochemistry

Background:

• Classical filtering devices in electronics have limitations in performance and size.
• Current electrode fabrication for high-frequency symmetric supercapacitors (HFSSCs) is complex and hinders commercialization.
• AC filtering is crucial for rectifying current ripples and attenuating noise in electronic devices.

Purpose of the Study:

• To design and report a high-performance, stand-alone carbyne film electrode for AC filtering.
• To evaluate the carbyne film's performance as a high-frequency symmetric supercapacitor (HFSSC) for AC line filtering.
• To demonstrate the practical application of the carbyne device in AC to DC power adaptors.

Main Methods:

• Fabrication of a novel carbyne film electrode using sp/sp²-hybridized carbon.
• Characterization of the carbyne film's electrochemical performance as an HFSSC.
• Testing the device's AC filtering capabilities across a wide frequency range.
• Implementation and evaluation of the carbyne device in a real-time AC to DC adaptor.

Main Results:

• The carbyne film exhibits ideal capacitive behavior at an ultrahigh scan rate (10,000 V s^-1) with excellent linearity, outperforming existing AC line filter capacitors.
• The carbyne HFSSC demonstrates a high energy density of 703.25 µF V² cm^-2 at 120 Hz, surpassing commercial electrolytic filters and other reported supercapacitors.
• The carbyne device successfully showed excellent filtering performance in a practical AC to DC adaptor at high frequencies.

Conclusions:

• The developed carbyne film represents a significant advancement in AC filtering technology.
• This material offers a high-performance, potentially commercializable alternative to conventional filtering devices.
• The carbyne film's superior performance at high frequencies opens new avenues for miniaturized and efficient electronic components.