#7758. Novel Gram-Scale Synthesis of Carbon Nano-Onions from Heavy Oil for Supercapacitors

October 2026publication date
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Journal’s subject area:
Mechanical Engineering;
Mechanics of Materials;
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Abstract:
Carbon nano-onions (CNOs), recognized as multilayered fullerenes, display superior electrical conductivity (comparable with carbon black) and large surface area due to the highly defective sp2 carbon shells, making it a promising member of carbon nanomaterials for energy applications. However, the lack of efficient synthesis of CNOs in large-scale production (gram quantities) has impeded their range of commercial applications. Herein, for the first time, it is demonstrated that the gram-scale synthesis of CNOs is developed by simply annealing pitch-coated petroleum coke for supercapacitors.
Keywords:
bubble templates; carbon onion; petroleum coke; pitch

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