ORCID Profile
0000-0003-3297-9578
Current Organisation
National University of Sciences and Technology
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Publisher: Wiley
Date: 02-07-2019
Publisher: MDPI AG
Date: 25-12-2022
DOI: 10.3390/NANO13010099
Abstract: Designing multifunctional nanomaterials for high performing electrochemical energy conversion and storage devices has been very challenging. A number of strategies have been reported to introduce multifunctionality in electrode/catalyst materials including alloying, doping, nanostructuring, compositing, etc. Here, we report the fabrication of a reduced graphene oxide (rGO)-based ternary composite NiO/MnO2/rGO (NMGO) having a range of active sites for enhanced electrochemical activity. The resultant sandwich structure consisted of a mesoporous backbone with NiO and MnO2 nanoparticles encapsulated between successive rGO layers, having different active sites in the form of Ni-, Mn-, and C-based species. The modified structure exhibited high conductivity owing to the presence of rGO, excellent charge storage capacity of 402 F·g−1 at a current density of 1 A·g−1, and stability with a capacitance retention of ~93% after 14,000 cycles. Moreover, the NMGO//MWCNT asymmetric device, assembled with NMGO and multi-wall carbon nanotubes (MWCNTs) as positive and negative electrodes, respectively, exhibited good energy density (28 Wh·kg−1), excellent power density (750 W·kg−1), and capacitance retention (88%) after 6000 cycles. To evaluate the multifunctionality of the modified nanostructure, the NMGO was also tested for its oxygen evolution reaction (OER) activity. The NMGO delivered a current density of 10 mA·cm−2 at the potential of 1.59 V versus RHE. These results clearly demonstrate high activity of the modified electrode with strong future potential.
Publisher: Elsevier BV
Date: 02-2021
Publisher: Elsevier BV
Date: 2022
Publisher: Frontiers Media SA
Date: 15-06-2020
Publisher: Oxford University Press (OUP)
Date: 29-03-2019
DOI: 10.1093/NAR/GKZ195
Publisher: Frontiers Media SA
Date: 03-06-2020
Publisher: Wiley
Date: 13-11-2018
Abstract: The large-scale application of sodium otassium-ion batteries is severely limited by the low and slow charge storage dynamics of electrode materials. The crystalline carbons exhibit poor insertion capability of large Na
Publisher: Wiley
Date: 12-06-2019
Publisher: Springer Science and Business Media LLC
Date: 12-2017
Publisher: Elsevier BV
Date: 02-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8NA00343B
Abstract: Silver nanoparticles (NPs) were synthesized using an efficient bioreducing agent from Fagonia cretica extract having the advantage of eco-friendliness over chemical and physical methods.
No related grants have been discovered for Zeeshan Ali.