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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.13264 |
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| _version_ | 1866909704903458816 |
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| author | Ghosh, Subrata Pagani, Giacomo Macrelli, Andrea Calloni, Alberto Bussetti, Gianlorenzo Lucotti, Andrea Tommasini, Matteo Suriano, Raffaella Agozzino, Marco Divitini, Giorgio Ivanov, Yurii P. Piazza, Veronica Russo, Valeria Jastrzkebska, Agnieszka M. Casiraghi, Cinzia Bassi, Andrea Li Casari, Carlo S. |
| author_facet | Ghosh, Subrata Pagani, Giacomo Macrelli, Andrea Calloni, Alberto Bussetti, Gianlorenzo Lucotti, Andrea Tommasini, Matteo Suriano, Raffaella Agozzino, Marco Divitini, Giorgio Ivanov, Yurii P. Piazza, Veronica Russo, Valeria Jastrzkebska, Agnieszka M. Casiraghi, Cinzia Bassi, Andrea Li Casari, Carlo S. |
| contents | Pulsed laser-deposited amorphous carbon nanofoams are potential candidate for electrochemical energy storage applications due to ultra-light weight, large volumetric void fractions, and co-existence of sp, sp2 and sp3 carbon hybridization. It is known that charge storage in carbon nanostructures containing disordered sp2-domains is determined by their wettability, surface area, and porosity. However, their charge-storage performance is limited to the areal capacitance of the order of a few mF/cm2. We enhanced the supercapacitor performance of nitrogen-doped amorphous carbon nanofoam by engineering its wettability and sp2-C/sp3-C ratio by vacuum annealing. The specific capacitance was enhanced by about fifty times and the device voltage increased from 0.8 to 1.1 V compared to as-grown carbon nanofoam. In addition, we examined for the first time the initial increase in specific capacitance of the aqueous symmetric supercapacitor with respect to the scan rate, employing in-situ measurements coupling Raman spectroscopy and electrochemistry. We attribute this effect, observed but generally not explained in previous works in the literature, to the electrochemical activation induced by structural changes during the charge storage performance. This optimization of pulsed laser deposited carbon nanofoam may open an avenue for fabricating lightweight and porous nanostructures for advanced macro-to-micro-supercapacitor devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_13264 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Wettability and sp2/sp3 ratio effects on supercapacitor performance of N-doped hydrogenated amorphous Carbon Nanofoam Ghosh, Subrata Pagani, Giacomo Macrelli, Andrea Calloni, Alberto Bussetti, Gianlorenzo Lucotti, Andrea Tommasini, Matteo Suriano, Raffaella Agozzino, Marco Divitini, Giorgio Ivanov, Yurii P. Piazza, Veronica Russo, Valeria Jastrzkebska, Agnieszka M. Casiraghi, Cinzia Bassi, Andrea Li Casari, Carlo S. Materials Science Applied Physics Pulsed laser-deposited amorphous carbon nanofoams are potential candidate for electrochemical energy storage applications due to ultra-light weight, large volumetric void fractions, and co-existence of sp, sp2 and sp3 carbon hybridization. It is known that charge storage in carbon nanostructures containing disordered sp2-domains is determined by their wettability, surface area, and porosity. However, their charge-storage performance is limited to the areal capacitance of the order of a few mF/cm2. We enhanced the supercapacitor performance of nitrogen-doped amorphous carbon nanofoam by engineering its wettability and sp2-C/sp3-C ratio by vacuum annealing. The specific capacitance was enhanced by about fifty times and the device voltage increased from 0.8 to 1.1 V compared to as-grown carbon nanofoam. In addition, we examined for the first time the initial increase in specific capacitance of the aqueous symmetric supercapacitor with respect to the scan rate, employing in-situ measurements coupling Raman spectroscopy and electrochemistry. We attribute this effect, observed but generally not explained in previous works in the literature, to the electrochemical activation induced by structural changes during the charge storage performance. This optimization of pulsed laser deposited carbon nanofoam may open an avenue for fabricating lightweight and porous nanostructures for advanced macro-to-micro-supercapacitor devices. |
| title | Wettability and sp2/sp3 ratio effects on supercapacitor performance of N-doped hydrogenated amorphous Carbon Nanofoam |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2503.13264 |