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Sputtered thin film deposited laser induced graphene based novel micro-supercapacitor device for energy storage application
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Sputtered thin film deposited laser induced graphene based novel micro-supercapacitor device for energy storage application
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Journal Article
Sputtered thin film deposited laser induced graphene based novel micro-supercapacitor device for energy storage application
2024
Overview
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.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
