Nitrogen-containing microporous carbon nanospheres with improved capacitive properties
We report the largely improved electrochemical capacitance of polypyrrole-derived microporous carbon nanospheres (MCNs, 80–100 nm in diameter) containing nitrogen functional groups. We have investigated the electrochemical properties of precursor polypyrrole nanospheres (PNs, with a high N/C ratio a...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Published: |
Royal Society of Chemistry
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/41499 |
| _version_ | 1848756163070394368 |
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| author | Su, F. Poh, C. Chen, J. Xu, G. Wang, D. Li, Qin Lin, J. Lou, X. |
| author_facet | Su, F. Poh, C. Chen, J. Xu, G. Wang, D. Li, Qin Lin, J. Lou, X. |
| author_sort | Su, F. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We report the largely improved electrochemical capacitance of polypyrrole-derived microporous carbon nanospheres (MCNs, 80–100 nm in diameter) containing nitrogen functional groups. We have investigated the electrochemical properties of precursor polypyrrole nanospheres (PNs, with a high N/C ratio and low surface area) and as-derived carbon nanospheres (CNs, with a moderate N/C ratio and low surface area) prepared by carbonizing PNs at different temperatures, and MCNs (with a low N/C ratio and high surface area) obtained by chemical activation of CNs. The samples are thoroughly characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric analysis (TGA), nitrogen sorption, elemental analysis, and X-ray photoelectron spectroscopy (XPS). It is found that MCNs with a high surface area and N-doping species exhibit much better capacitive performance compared to the PNs and CNs, and commercial carbon blacks (XC-72 and BP2000) as well. The MCN sample gives a reversible specific capacitance of [similar]240 F g−1 for 3000 cycles in aqueous media as a result of combined advantages of high electrochemical activity of doped heteroatoms (N and O) and accessible well-developed porosity, demonstrating the promising use in high-energy-density supercapacitors. |
| first_indexed | 2025-11-14T09:07:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-41499 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:07:49Z |
| publishDate | 2012 |
| publisher | Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-414992017-09-13T14:15:04Z Nitrogen-containing microporous carbon nanospheres with improved capacitive properties Su, F. Poh, C. Chen, J. Xu, G. Wang, D. Li, Qin Lin, J. Lou, X. We report the largely improved electrochemical capacitance of polypyrrole-derived microporous carbon nanospheres (MCNs, 80–100 nm in diameter) containing nitrogen functional groups. We have investigated the electrochemical properties of precursor polypyrrole nanospheres (PNs, with a high N/C ratio and low surface area) and as-derived carbon nanospheres (CNs, with a moderate N/C ratio and low surface area) prepared by carbonizing PNs at different temperatures, and MCNs (with a low N/C ratio and high surface area) obtained by chemical activation of CNs. The samples are thoroughly characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric analysis (TGA), nitrogen sorption, elemental analysis, and X-ray photoelectron spectroscopy (XPS). It is found that MCNs with a high surface area and N-doping species exhibit much better capacitive performance compared to the PNs and CNs, and commercial carbon blacks (XC-72 and BP2000) as well. The MCN sample gives a reversible specific capacitance of [similar]240 F g−1 for 3000 cycles in aqueous media as a result of combined advantages of high electrochemical activity of doped heteroatoms (N and O) and accessible well-developed porosity, demonstrating the promising use in high-energy-density supercapacitors. 2012 Journal Article http://hdl.handle.net/20.500.11937/41499 10.1039/c0ee00277a Royal Society of Chemistry restricted |
| spellingShingle | Su, F. Poh, C. Chen, J. Xu, G. Wang, D. Li, Qin Lin, J. Lou, X. Nitrogen-containing microporous carbon nanospheres with improved capacitive properties |
| title | Nitrogen-containing microporous carbon nanospheres with improved capacitive properties |
| title_full | Nitrogen-containing microporous carbon nanospheres with improved capacitive properties |
| title_fullStr | Nitrogen-containing microporous carbon nanospheres with improved capacitive properties |
| title_full_unstemmed | Nitrogen-containing microporous carbon nanospheres with improved capacitive properties |
| title_short | Nitrogen-containing microporous carbon nanospheres with improved capacitive properties |
| title_sort | nitrogen-containing microporous carbon nanospheres with improved capacitive properties |
| url | http://hdl.handle.net/20.500.11937/41499 |