Abstract
The development of polymer-based devices has attracted much attention due to their
miniaturization, flexibility, lightweight and sustainable power sources with high eciency 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 diraction, 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.
