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Interfacial engineering of reduced graphene oxide for high-performance supercapacitor materials

Hao, H; Wang, J; Lv, Q; Jiao, Y; Li, J; Li, W; Akpinar, I; ... He, G; + view all (2020) Interfacial engineering of reduced graphene oxide for high-performance supercapacitor materials. Journal of Electroanalytical Chemistry , 878 , Article 114679. 10.1016/j.jelechem.2020.114679. Green open access

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Abstract

To solve the problems related to the re-stacking of reduced graphene oxides (rGO) and further improve their surface chemical behaviors to satisfy supercapacitor demands. The rGO decorated with graphene quantum dots has been successfully prepared via a facile low-power ultrasonic method. It is demonstrated the graphene quantum dots/reduced graphene oxide electrode has a high specific capacitance of 312 F g−1, which is nearly three times higher than that of the reduced graphene oxide (132 F g−1). The enhanced super-capacitive performances of graphene quantum dots/reduced graphene oxide have been attributed to the introduction of graphene quantum dots, which effectively prevent the aggregation and restacking of reduced graphene oxide sheets, promoting its surface exposed to the electrolyte for sufficient mass transfer. Meanwhile, these features provide more pathways for the transportation of electrons between the interlayer of reduced graphene oxide sheets. Afterward, a detailed energy storage mechanism was analyzed.

Type: Article
Title: Interfacial engineering of reduced graphene oxide for high-performance supercapacitor materials
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jelechem.2020.114679
Publisher version: https://doi.org/10.1016/j.jelechem.2020.114679
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Graphene quantum dots, Reduced graphene oxide, Synergistic effect, Asymmetric supercapacitors
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10113385
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