Sputtered thin film deposited laser induced graphene based novel micro-supercapacitor device for energy storage application

Pioneering flexible micro-supercapacitors, designed for exceptional energy and power density, transcend conventional storage limitations. Interdigitated electrodes (IDEs) based on laser-induced graphene (LIG), augmented with metal-oxide modifiers, harness synergies with layered graphene to achieve s...

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Bibliographic Details
Published in:Scientific reports 2024-07, Vol.14 (1), p.16289-12, Article 16289
Main Authors: Sain, Sourav, Chowdhury, Suman, Maity, Sayantan, Maity, Gurupada, Roy, Susanta Sinha
Format: Article
Language:English
Subjects:
639/301/299/161
639/4077/4079/4105
Capacitance
Composite materials
Ductility
Electrodes
Energy storage
Flexible electrodes
Flow rates
Graphene
Hafnium oxide (HfO2)
Humanities and Social Sciences
Laser Induced Graphene (LIG)
Lasers
Metal oxides
Metals
Micro supercapacitor devices (MSC)
multidisciplinary
Oxidation
Polyvinyl alcohol
Science
Science (multidisciplinary)
Sputtering
Thin films
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Summary:Pioneering flexible micro-supercapacitors, designed for exceptional energy and power density, transcend conventional storage limitations. Interdigitated electrodes (IDEs) based on laser-induced graphene (LIG), augmented with metal-oxide modifiers, harness synergies with layered graphene to achieve superior capacitance. This study presents a novel one-step process for sputtered plasma deposition of HfO 2 , resulting in enhanced supercapacitance performance. Introducing LIG-HfO 2 micro-supercapacitor (MSC) devices with varied oxygen flow rates further boosts supercapacitance performance by introducing oxygen functional groups. FESEM investigations demonstrate uniform coating of HfO 2 on LIG fibers through sputtering. Specific capacitance measurements reveal 6.4 mF/cm 2 at 5 mV/s and 4.5 mF/cm 2 at a current density of 0.04 mA/cm 2 . The LIG-HfO 2 devices exhibit outstanding supercapacitor performance, boasting at least a fourfold increase over pristine LIG. Moreover, stability testing indicates a high retention rate of 97% over 5000 cycles, ensuring practical real-time applications.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-62192-y