Artykuł w czasopiśmie
Brak miniatury
Licencja
Dostęp zamkniętyA wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs
| dc.abstract.en | In this paper, we report a simple and effective method to functionalize industrial-grade multi-walled carbon nanotubes (MWCNTs) with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), via oxidation of MWCNTS and followed by carbodiimide coupling of amino-TEMPO. The effective coupling is confirmed and studied by EPR, HRTEM, BET, XPS, FTIR, TGA and XRD techniques. Electrochemical studies reveal the capacitive enhancement of MWCNTs-TEMPO, where MWCNTs-TEMPO shows capacitance value (66 F g−1 at 0.25 A g−1) that is 5-times higher than that of industrial grade MWCNTs (13.5 F g−1 at 0.25 A g−1). This can be due to the reversible redox reaction of nitroxide radicals on TEMPO that contributes to pseudocapacitance. A symmetrical supercapacitor is assembled with MWCNTs-TEMPO as electrode material and optimized with wide operating voltage (2 V) to produce high energy density of 26.6 Wh kg−1 with high stability (90% capacitance retention over 4000 cycles). The findings propose a facile approach to modify industrial grade MWCNTs as the electrode materials in supercapacitors. |
| dc.affiliation | Uniwersytet Warszawski |
| dc.contributor.author | Megiel, Elżbieta |
| dc.contributor.author | Gomaa, A.M. Ali |
| dc.contributor.author | Kwok, Feng Chong |
| dc.contributor.author | Algarni, H. |
| dc.contributor.author | Romański, Jan |
| dc.date.accessioned | 2024-01-24T18:14:34Z |
| dc.date.available | 2024-01-24T18:14:34Z |
| dc.date.issued | 2018 |
| dc.description.finance | Nie dotyczy |
| dc.description.volume | 271 |
| dc.identifier.doi | 10.1016/J.MOLLIQ.2018.08.123 |
| dc.identifier.issn | 0167-7322 |
| dc.identifier.uri | https://repozytorium.uw.edu.pl//handle/item/101941 |
| dc.language | eng |
| dc.pbn.affiliation | chemical sciences |
| dc.relation.ispartof | Journal of Molecular Liquids |
| dc.relation.pages | 31-39 |
| dc.rights | ClosedAccess |
| dc.sciencecloud | nosend |
| dc.subject.en | MWCNTs |
| dc.subject.en | Functionalization |
| dc.subject.en | Nitroxides |
| dc.subject.en | TEMPO |
| dc.subject.en | Supercapacitance |
| dc.title | A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs |
| dc.type | JournalArticle |
| dspace.entity.type | Publication |