Abstract
Triboelectric nanogenerators (TENGs) have marked their applications in various fields, most importantly, in medical devices. The electrical output of the TENGs mainly concentrated on parameters such as electrode separation distance, applied mechanical pressure, surface charge density, and overlapping surface area. The surface area of the active layer in TENGs plays a crucial role. Given this, the present contribution is the first report on the utilization of lanthanum oxide (La2O3) as an active material with a large surface area (~ 72.33 m2/g) in TENGs. The nanocrystals of La2O3 have been successfully embedded into TENGs architecture through a high-quality screen-printed film with a Teflon-counter surface. The in-house test-rig of TENGs resulted in an output open-circuit voltage of 120 V and a short-circuit current of 23.7 μA. Further, the maximum power density is 7.125 W/m2 at an external load resistance of 30 MΩ. These results suggest that La2O3 is a suitable contender in various self-powered devices.
Highlights
The increased human dependency on portable electronic gadgets resulted in the high demand for the energy sources, such as batteries and other storage devices
The recent reports on active materials for Triboelectric nanogenerators (TENGs) have mainly focused to enhance the performance by morphology tuning, fabrication methods and selecting the best materials [2,3,4,5,6,7]
The synthesis of high surface area (~72.33 m2/g) La2O3 nanocrystals using the hydrothermal technique is presented with its direct utilization in the form of screen-printed film in TENGs
Summary
The increased human dependency on portable electronic gadgets resulted in the high demand for the energy sources, such as batteries and other storage devices. The demand for low powered and selfpowered devices making their mark worldwide. The triboelectric nanogenerators (TENGs) play a crucial role which harvests naturally occurring energy as a power source. The recent reports on active materials for TENGs have mainly focused to enhance the performance by morphology tuning, fabrication methods and selecting the best materials [2,3,4,5,6,7]. The recent reports focused mainly on tribo-active materials like zinc oxide (ZnO), polyvinylidene fluoride (PVDF), polyimide aerogel, etc. There were less or no reports on TENGs using La2O3 as active material. The study is focused mainly on TENGs based on La2O3
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