Design of innovative nitrogen-doped carbon quantum dots integrated with magnetic nanocomposite barium ferrite for enhanced supercapacitors electrode performance

Al-Maswari, Basheer M. and Elsharkawy, Eman Ramadan and Almotairy, Awatif Rashed Z. and Alkanad, Khaled and Zarrouk, Abdelkader and Al-Yusufy, Fatima A. S. and Venkatesha, B. M. (2026) Design of innovative nitrogen-doped carbon quantum dots integrated with magnetic nanocomposite barium ferrite for enhanced supercapacitors electrode performance. Inorganic Chemistry Communications, 183. p. 115790. ISSN 1879-0259

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Abstract

Nitrogen-doped carbon quantum dots (NCQDs) have garnered considerable interest in energy storage applications owing to their remarkable electrical characteristics and surface adaptability. In this regard, barium ferrite (BFO) nanocomposites with NCQDs have been incorporated due to their remarkable electrochemical performance in supercapacitors. Where NCQDs with an average particle size of about 3Â nm were prepared using a simple hydrothermal approach and then combined with barium ferrite (BFO) to create a novel magnetic nanocomposite (BFO@NCQDs). The NCQDs functioned as structure-directing agents, facilitating exact regulation of the size, crystallinity, and shape of the BFO nanoparticles. The structural and morphological characteristics of the synthesized nanocomposite were thoroughly characterized using PXRD, Raman spectroscopy, FTIR, FE-SEM, and HRTEM. Magnetic studies revealed a saturation magnetisation (Ms) of 50.59Â emu/g and a notably increased specific surface area (SABET) of 821.65Â m2/g. Electrochemical assessments in a 5Â M KOH electrolyte using a three-electrode configuration demonstrated exceptional performance, attaining a specific capacitance (Cs) of 1513.94Â F/g at a scan rate of 5Â mV/s, by ascertained using cyclic voltammetry. Galvanostatic charge/discharge analysis confirmed a high specific capacitance of 1984.98Â F/g at a current density of 2 A/g. The electrode exhibited remarkable energy and power densities, achieving 42.805Â Wh/kg and 7565.43Â W/kg, respectively, while sustaining a power density of 2090.39Â W/kg at peak energy output. The electrode material exhibited exceptional cycling stability, maintaining 91.1Â of its capacitance after 10,000Â cycles at 12 A/g. The findings underscore BFO@NCQDs as an economical, highly conductive, and resilient electrode material, positioning it as a viable option for next-generation supercapacitors and portable electronic applications.

Item Type:	Article
Uncontrolled Keywords:	N-doped carbon QDs, Novel electrode, Barium ferrite, Magnetic nanocomposite, Energy storage, Supercapacitors
Subjects:	C Chemical Science > Chemistry
Divisions:	Yuvaraj college > Chemistry
Depositing User:	C Swapna Library Assistant
Date Deposited:	29 Dec 2025 05:13
Last Modified:	29 Dec 2025 05:13
URI:	http://eprints.uni-mysore.ac.in/id/eprint/18222

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