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Journal of Electrochemical Science and Engineering, Vol. 12 No. 4, 2022.

Original scientific paper

https://doi.org/10.5599/jese.1411

Chemical vapor deposited graphene-based quasi-solid-state ultrathin and flexible sodium-ion supercapacitor

Mohammed Saquib Khan ; Materials Research Centre, Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur, 302017, India
Preeti Shakya ; Materials Research Centre, Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur, 302017, India
Nikita Bhardwaj ; Department of Physics, Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur, 302017, India
Deependra Jhankal ; Department of Physics, Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur, 302017, India
Atul Kumar Sharma ; Materials Research Centre, Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur, 302017, India
Malay Kumar Banerjee ; Research Chair, SGVU, Jaipur,302017, India.
Kanupriya Sachdev ; Materials Research Centre, Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur 302017, India and Department of Physics, Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur 30201, India

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Abstract

Flexible electronic devices find wide application in wearable electronics and foldable gadgets. This article reports chemical vapor deposited (CVD) few-layers graphene for a solid-state flexible supercapacitor device. Raman spectroscopy analysis reveals up to five layers in the graphene samples. Polyvinyl alcohol-Na2SO4 hydrogel membrane is used as a gel polymer electrolyte (GPE). 50 nm thick silver (Ag) deposited on polyethylene tere­phthalate (PET) through E-beam deposition served as the flexible current collector for the device. Galvanostatic charge-discharge (GCD) executed on the fabricated device to ana­lyze its electrochemical performance yielded a specific areal capacitance of 15.3 mF cm-2 at 0.05 mA cm-2 current density. The obtained power density of the fabricated device is 0.53 µWh cm-2 at a power density of 25 µW cm-2.

Keywords

Gel polymer electrolyte; E-beam deposition; flexible electronics; light-weight supercapacitor; chemical vapor deposition; few-layer graphene

Hrčak ID:

283706

URI

https://hrcak.srce.hr/283706

Publication date:

18.9.2022.

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