| Abstract [eng] |
Increasing demand of sustainable energy and emergence of TENGS as promising renewable energy source motivated us to further investigate PEO-based TENGS and how we can achieve maximum power output using different TENG configuration or incorporating active fillers into PEO based. We first used PEO- based dielectric film as active triboelectric layer and combination of six different electrode configurations(Al/PEO_Cu, PDMS/PEO_Al, PDMS/PEO_Cu, Cu/PEO_Al, Cu/PEO_Cu, Al/PEO_Al) were used and after investigation it was observed that PEO-based TENGS with PDMS/PEO configuration exhibited best results with VOC of 90 V, ISC of 0.2µA, Load Current of ~33nA and power density of 10-8 W/m². after discovering that performance of TENG highly depends on polarity contrast between the surfaces we further investigated charge interaction mechanism using three different types of nano fillers (CNTs ,BaTiO3 , silicone carbide (SiC) and added these fillers in PEO based TENGs and investigated and compared their results and observed that PEO/SiC shows best behavior among all the tested fillers with Voc of ~76 V, Isc of +0.4,-1.3µA, surface charge density of +1.615nC/cm2, Irms of 0.067 µA. After that, we optimized SiC concentration in PEO matrix and determined the amount of SiC particle concentration that would give optimal energy harvesting performance, Seven different concentrations containing SiC content of 0.025, 0.075, 0.1, 0.3, 0.5, 1, and 5 vol% were prepared and tested and best results were obtained for 0.1 vol% SiC with surface charge density of +2.59/−2.33 nC/cm² and highest power density of 9.325 × 10⁻7 W/cm² at optimum PEO resistance of 10.62 MΩ. Results improve with increase in concentration ,but when the concentration exceeds a certain limit charge transfer and charge trapping efficiency starts to decrease which decreases performance of TENGs at higher concentration. Well dispersed nanoparticles at the concentration of 0.1 vol% SiC, lead to the maximum dielectric enhancement and charge trapping efficiency resulting in best output performance. |
