Low-density functionalized amorphous carbon nanofoam as binder-free Supercapacitor electrode
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909600479969280 |
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| author | Ghosh, Subrata Righi, Massimiliano Macrelli, Andrea Goto, Francesco Agozzino, Marco Bussetti, Gianlorenzo Russo, Valeria Bassi, Andrea Li Casari, Carlo S. |
| author_facet | Ghosh, Subrata Righi, Massimiliano Macrelli, Andrea Goto, Francesco Agozzino, Marco Bussetti, Gianlorenzo Russo, Valeria Bassi, Andrea Li Casari, Carlo S. |
| contents | Nanoporous carbon materials containing small domains of sp2-carbon with highly disordered structures are promising for supercapacitor applications. Herein, we synthesize amorphous carbon nanofoam with 98% volumetric void fraction and low mass density of around 30 mg/cm3 by pulsed laser deposition at room temperature. With the unavoidable oxygen functional groups on the nanoporous surface, carbon nanofoam and nitrogen-functionalized carbon nanofoams are directly grown on the desired substrate under different background gases (Ar, N2, N2-H2), and employed as supercapacitor electrodes. Among the background gases used in synthesis, the use of nitrogen yields nanofoam with higher thickness and more N-content with higher graphitic-N. From the test of amorphous carbon nanofoam supercapacitor device, nitrogenated amorphous carbon electrode shows a higher areal capacitance of 4.1 mF/cm2 at 20 mV/s in aqueous electrolyte, a better capacitance retention at higher current, and excellent cycle stability (98%) over 10000 charge-discharge cycles are achieved compared to not-functionalized counterpart prepared under Ar background gas (2.7 mF/cm2 and cycle stability of 88%). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_23060 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Low-density functionalized amorphous carbon nanofoam as binder-free Supercapacitor electrode Ghosh, Subrata Righi, Massimiliano Macrelli, Andrea Goto, Francesco Agozzino, Marco Bussetti, Gianlorenzo Russo, Valeria Bassi, Andrea Li Casari, Carlo S. Applied Physics Materials Science Nanoporous carbon materials containing small domains of sp2-carbon with highly disordered structures are promising for supercapacitor applications. Herein, we synthesize amorphous carbon nanofoam with 98% volumetric void fraction and low mass density of around 30 mg/cm3 by pulsed laser deposition at room temperature. With the unavoidable oxygen functional groups on the nanoporous surface, carbon nanofoam and nitrogen-functionalized carbon nanofoams are directly grown on the desired substrate under different background gases (Ar, N2, N2-H2), and employed as supercapacitor electrodes. Among the background gases used in synthesis, the use of nitrogen yields nanofoam with higher thickness and more N-content with higher graphitic-N. From the test of amorphous carbon nanofoam supercapacitor device, nitrogenated amorphous carbon electrode shows a higher areal capacitance of 4.1 mF/cm2 at 20 mV/s in aqueous electrolyte, a better capacitance retention at higher current, and excellent cycle stability (98%) over 10000 charge-discharge cycles are achieved compared to not-functionalized counterpart prepared under Ar background gas (2.7 mF/cm2 and cycle stability of 88%). |
| title | Low-density functionalized amorphous carbon nanofoam as binder-free Supercapacitor electrode |
| topic | Applied Physics Materials Science |
| url | https://arxiv.org/abs/2410.23060 |