@article{eb9d0073a70e4f5a88e87000af61353f,
title = "Flexible self-charging supercapacitor based on graphene-Ag-3D graphene foam electrodes",
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.",
keywords = "supercapacitor, graphene foam, self-powered systems, wearable systems, pH sensors, energy storage",
author = "Libu Manjakkal and {Garc{\'i}a N{\'u}{\~n}ez}, Carlos and Wenting Dang and Ravinder Dahiya",
year = "2018",
month = jun,
day = "25",
doi = "10.1016/j.nanoen.2018.06.072",
language = "English",
volume = "51",
pages = "604--612",
journal = "Nano Energy",
issn = "2211-2855",
publisher = "Elsevier B.V.",
}