dc.contributor.author | Kuzhandaivel, Hemalatha | |
dc.contributor.author | Manickam, Sornalatha | |
dc.contributor.author | Balasingam, Suresh Kannan | |
dc.contributor.author | Franklin, Manik Clinton | |
dc.contributor.author | Kim, Hee-Je | |
dc.contributor.author | Nallathambi, Karthick Sivalingam | |
dc.date.accessioned | 2022-04-26T08:11:11Z | |
dc.date.available | 2022-04-26T08:11:11Z | |
dc.date.created | 2021-05-16T19:19:01Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | New Journal of Chemistry. 2021, 45 (8), 4101-4110. | en_US |
dc.identifier.issn | 1144-0546 | |
dc.identifier.uri | https://hdl.handle.net/11250/2992717 | |
dc.description.abstract | Sulfur and nitrogen-doped graphene quantum dots/polyaniline (S,N-GQDP) nanocomposites are prepared by a two-step synthesis method. The heteroatoms (sulfur and nitrogen) doped graphene quantum dots (S,N-GQDs) are first prepared by a hydrothermal method and then mixed with aniline at three different concentrations, followed by polymerization to form S,N-GQDP1, S,N-GQDP2 and S,N-GQDP3 nanocomposites. Various physicochemical characterization techniques are used to confirm the formation of S,N-GQDs and their interaction with polyaniline (PANI) in S,N-GQDP nanocomposites. Fourier transform infrared (FTIR) and Raman spectral analyses confirm the delocalization of electrons in the polymer backbone of S,N-GQDP through electrostatic interaction and the π–π interaction between S,N-GQDs and pristine PANI. The pristine PANI and the three-different nanocomposites are used as electroactive materials to assess the energy storage properties. The S,N-GQDP2 composite has pine cone shape-like particles with a high surface area (154 m2 g−1). The doping of heteroatoms improves the electrical conductivity and increases the reactive sites that act as trap sites for enhanced ion storage. The S,N-GQDP2 nanocomposite shows a highest specific capacitance of 645 F g−1 at a current density of 0.5 A g−1 in the three-electrode configuration. The S,N-GQDP2 composite-based symmetric cell shows an energy density of 17.25 Wh kg−1 (corresponding device capacitance of 124.2 F g−1 at a current density of 1 A g−1) at a power density of 500 W kg−1. A high volumetric energy density of 18.11 Wh L−1 is obtained at a volumetric power density of 525 W L−1. In addition, the S,N-GQDP2 nanocomposite-based symmetric device shows good cycling stability for 1000 cycles with a capacitance retention of 90%. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | American Chemical Society | en_US |
dc.relation.uri | https://pubs.rsc.org/en/content/articlelanding/2021/NJ/D1NJ00038A#!divAbstract | |
dc.title | Sulfur and nitrogen-doped graphene quantum dots/PANI nanocomposites for supercapacitors | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | This version of the article will not be available due to copyright restrictions by ACS | en_US |
dc.source.pagenumber | 4101-4110 | en_US |
dc.source.volume | 45 | en_US |
dc.source.journal | New Journal of Chemistry | en_US |
dc.source.issue | 8 | en_US |
dc.identifier.doi | 10.1039/d1nj00038a | |
dc.identifier.cristin | 1910291 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |