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

Autor: Sain S; Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence (SNIoE), Deemed to be University, Delhi-NCR, Greater Noida, 201314, India., Chowdhury S; Department of Physics and Astrophysics, University of Delhi, Delhi, 110007, India., Maity S; Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence (SNIoE), Deemed to be University, Delhi-NCR, Greater Noida, 201314, India., Maity G; Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence (SNIoE), Deemed to be University, Delhi-NCR, Greater Noida, 201314, India., Roy SS; Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence (SNIoE), Deemed to be University, Delhi-NCR, Greater Noida, 201314, India. susanta.roy@snu.edu.in.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Jul 15; Vol. 14 (1), pp. 16289. Date of Electronic Publication: 2024 Jul 15.
DOI: 10.1038/s41598-024-62192-y
Abstrakt: 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.
(© 2024. The Author(s).)
Databáze: MEDLINE
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