Flexible self-charging supercapacitor based on graphene-Ag-3D graphene foam electrodes

By Libu Manjakkal, C. Núñez, W. Dang, Ravinder S. Dahiya. Nano Energy, 2018

198 citations recorded by the source corpus.

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.

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/23b8d8edcbb8e2ead0d9e0e61f6757c7d6b86de1

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In Biomedical Engineering

In Electronic, Optical and Magnetic Materials

Ravinder S. Dahiya

In Polymers and Plastics

Citations in the corpus

Flexible Electronics: Status, Challenges and Opportunities (2020, background): “, 2019), metallic foams (Gao et al., 2018; Manjakkal et al., 2018; Taniya Purkait, 2018) and aerogels (Bora et al.”
Metal oxides based electrochemical pH sensors: Current progress and future perspectives (2020, methodology): “results [230], (b) 3D schema of FSPP (flexible PV cell, GFSC and pH sensor with permission [3].”