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Open AccessArticle

Free-Standing PVDF/Reduced Graphene Oxide Film for All-Solid-State Flexible Supercapacitors towards Self-Powered Systems

1
Nanomaterials and System Lab, Major in Mechatronics Engineering, Faculty of Applied Energy System, Jeju National University, Jeju 63243, Korea
2
Department of Electronic Engineering, Faculty of Applied Energy System, Jeju National University, Jeju 63243, Korea
3
Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Korea
4
Department of Advanced Convergence Science and Technology, Jeju National University, Jeju 63243, Korea
*
Author to whom correspondence should be addressed.
These authors contributed equally in this work.
Micromachines 2020, 11(2), 198; https://doi.org/10.3390/mi11020198
Received: 14 January 2020 / Revised: 1 February 2020 / Accepted: 6 February 2020 / Published: 14 February 2020
(This article belongs to the Special Issue Selected Papers from the ICAE 2019)
The development of polymer-based devices has attracted much attention due to their miniaturization, flexibility, lightweight and sustainable power sources with high efficiency in the field of wearable/portable electronics, and energy system. In this work, we proposed a polyvinylidene fluoride (PVDF)-based composite matrix for both energy harvesting and energy storage applications. The physicochemical characterizations, such as X-ray diffraction, laser Raman, and field-emission scanning electron microscopy (FE-SEM) analyses, were performed for the electrospun PVDF/sodium niobate and PVDF/reduced graphene oxide composite film. The electrospun PVDF/sodium niobate nanofibrous mat has been utilized for the energy harvester which shows an open circuit voltage of 40 V (peak to peak) at an applied compressive force of 40 N. The PVDF/reduced graphene oxide composite film acts as the electrode for the symmetric supercapacitor (SSC) device fabrication and investigated for their supercapacitive properties. Finally, the self-charging system has been assembled using PVDF/sodium niobate (energy harvester), and PVDF/reduced graphene oxide SSC (energy storage) and the self-charging capability is investigated. The proposed self-charging system can create a pathway for the all-polymer based composite high-performance self-charging system. View Full-Text
Keywords: polyvinylidene fluoride; polymer nanocomposites; flexible supercapacitors; electrospinning; self-powered system polyvinylidene fluoride; polymer nanocomposites; flexible supercapacitors; electrospinning; self-powered system
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MDPI and ACS Style

Pazhamalai, P.; Mariappan, V.K.; Sahoo, S.; Kim, W.Y.; Mok, Y.S.; Kim, S.-J. Free-Standing PVDF/Reduced Graphene Oxide Film for All-Solid-State Flexible Supercapacitors towards Self-Powered Systems. Micromachines 2020, 11, 198.

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