Abstract
Porous carbon materials with regular morphological structure and high heteroatom content have great application potentials in the area of novel energy storage devices. Herein, a family of novel N-doped porous carbon nanofibers are prepared by using a facile CuCl2-mediated activation of a fiber-like N-rich cross-linked polymer, which is readily accessible based on a solvent-thermal reaction between 2,4,6-tris(4-aminophenyl)triazine and dimethyl succinyl succinate. With the assistance of the mild activating reagent (CuCl2), the as-prepared carbon nanofibers (C-X-CuCl2) retain the fibrous morphology of precursor and achieve abundant heteroatom species in the carbon skeleton. The C-X-CuCl2 samples obtain the highest specific surface area of 1964.9 m2 g–1 and the highest N/O doping contents of 10.10 and 15.06 at.%, respectively, all of which are favorable for improving electrochemical performance when applied in supercapacitors. The C-750-CuCl2 electrode delivers the best-performed overall capacitance of 281.5 F g–1 at 0.5 A g–1, and its symmetrical supercapacitors with aqueous electrolyte (6 M KOH) show 93.1% of capacity retention after 10000 charging/discharging operations at 5.0 A g–1. An outstanding energy density of 75.5 Wh kg–1 at a power density of 300 W kg–1 is realized as well for the C-750-CuCl2-based symmetrical supercapacitors when 1-ethyl-3-methylimidazolium tetrafluoroborate is used as the electrolyte. These results indicate that the C-750-CuCl2 carbon nanofiber is a promising material for high-performance supercapacitors.
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Jiang Peng: Methodology, Investigation, Writing-Original Draft, Data curation. Jing Huang: Writing-Original Draft, Visualization. Junqing Zeng: Software. Liping Zheng: Supervision, Validation. Huajie Chen: Supervision, Resources, Writing-review & editing. All authors read and approved the final manuscript.
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Peng, J., Huang, J., Zeng, J. et al. N-doped porous carbon nanofibers derived from N-rich cross-linked polymer for high-performance supercapacitors. Ionics 30, 979–990 (2024). https://doi.org/10.1007/s11581-023-05287-2
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DOI: https://doi.org/10.1007/s11581-023-05287-2