Year: 2025
Type: article
Abstract: Hollow carbon spheres are among the most promising materials for supercapacitor electrodes. Here, N, S, and F-doped hollow carbon spheres have been synthesized, and their electric double layer supercapacitor (EDLC) performances have been investigated in a KOH electrolyte. It is found that the device with electrodes having N, S, and F ternary atom-doped material delivers superior performance and rate capability compared to N-doped and N, S co-doped materials. The ternary atom-doped device delivered a specific energy of 11.15 Wh kg −1 at a power density of 208 W kg −1 . The EDL symmetric capacitor delivered 6.83 Wh kg −1 even at a higher specific power of 10 kW kg −1 (5 A g −1 ). The EDL symmetric capacitor exhibited excellent capacitance retention of 89% and a coulombic efficiency of 100% after 22,000 cycles at 1 A g −1 . Thus, the ternary atom-doped material emerges as a better candidate for versatile and high-performance devices in a wide range of high-energy, high-power applications.
Source: Scientific Reports
Institution: Amrita Vishwa Vidyapeetham
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
Awards: G1736600914, G8432358218
OpenAlex ID: W4413891888