Manjakkal, L. , García Núñez, C. , Dang, W. and Dahiya, R. (2018) Flexible self-charging supercapacitor based on graphene-Ag-3D graphene foam electrodes. Nano Energy, 51, pp. 604-612. (doi: 10.1016/j.nanoen.2018.06.072)
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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.
Item Type: | Articles |
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Additional Information: | Also funded by the Scottish Funding Council through SFC-GCRF (SFC/AN/15/2016) project on Energy Autonomous Bio-Sensor Patch suited for Affordable Self-Health Monitoring. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Dahiya, Professor Ravinder and Garcia Nunez, Dr Carlos and Dang, Ms Wenting and Manjakkal, Dr Libu |
Authors: | Manjakkal, L., García Núñez, C., Dang, W., and Dahiya, R. |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering College of Science and Engineering > School of Engineering > Systems Power and Energy |
Journal Name: | Nano Energy |
Publisher: | Elsevier |
ISSN: | 2211-2855 |
ISSN (Online): | 2211-3282 |
Published Online: | 25 June 2018 |
Copyright Holders: | Copyright © 2018 The Authors |
First Published: | First published in Nano Energy 51:604-612 |
Publisher Policy: | Reproduced under a Creative Commons License |
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