Dr Libu Manjakkal L.Manjakkal@napier.ac.uk
Lecturer
Flexible self-charging supercapacitor based on graphene-Ag-3D graphene foam electrodes
Manjakkal, Libu; N��ez, Carlos Garc�a; Dang, Wenting; Dahiya, Ravinder
Authors
Carlos Garc�a N��ez
Wenting Dang
Ravinder Dahiya
Abstract
A flexible three-dimensional porous graphene foam-based supercapacitor (GFSC) is presented here for energy storage applications. With a novel layered structure of highly conductive electrodes (graphene-Ag conductive epoxy–graphene foam), forming an electrochemical double layer, the GFSC exhibits excellent electrochemical and supercapacitive performance. At a current density of 0.67 mA cm−2, the GFSCs show excellent performance with areal capacitance (38 mF cm−2) about three times higher than the values reported for flexible carbon-based SCs. The observed energy and power densities (3.4 µW h cm−2 and 0.27 mW cm−2 respectively) are better than the values reported for carbon-based SCs. Analyzed under static and dynamic bending conditions, the GFSCs are stable with up to 68% capacitance retention after 25000 charge–discharge cycles. The light-weight, cost-effective fabrication and no self-heating make the GFSCs a promising alternative to conventional source of energy in the broad power density ranging from few nW cm−2 to mW cm−2. In this regard, GFSC was integrated with a flexible photovoltaic cell resulting in a flexible self-charging power pack. This pack was successfully utilized to power continuously a wearable CuO nanorod based chemi-resistive pH sensor.
Citation
Manjakkal, L., Núñez, C. G., Dang, W., & Dahiya, R. (2018). Flexible self-charging supercapacitor based on graphene-Ag-3D graphene foam electrodes. Nano Energy, 51, 604-612. https://doi.org/10.1016/j.nanoen.2018.06.072
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 20, 2018 |
Online Publication Date | Jun 25, 2018 |
Publication Date | 2018-09 |
Deposit Date | Jul 19, 2022 |
Publicly Available Date | Jul 20, 2022 |
Journal | Nano Energy |
Print ISSN | 2211-2855 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 51 |
Pages | 604-612 |
DOI | https://doi.org/10.1016/j.nanoen.2018.06.072 |
Keywords | Supercapacitor, Graphene foam, Self-powered systems, Wearable systems, pH sensor, Energy storage |
Public URL | http://researchrepository.napier.ac.uk/Output/2890696 |
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Flexible Self-charging Supercapacitor Based On Graphene-Ag-3D Graphene Foam Electrodes
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
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