Unveiling Botanical Piezo-Tribo Energy Harvesting for Autonomous Measurement Systems

The aim of this study is to generate energy by capturing the movements of plants and trees through a bio-mimetic approach, whether in open spaces due to atmospheric forces or within enclosed environments, even from subtle motions and vibrations. The proposed mechanism involves using a triboelectric converter comprising a dielectric layer sandwiched between two cylindrical bars that slide against each other, strategically positioned to harness the broader movements of branches or plant stems. Additionally, several layers of polymeric piezoelectric material replicate the motions of leaves. This innovative system aims to extract energy that can power electronic devices and sensors. It is worth noting that the conceived device involves harnessing energy from small vibrations generated by rubbing leaves (in the frequency range 5-25 Hz) together and larger displacements, like those of a tree trunk, typically at lower frequencies than previously considered «5 Hz). The potential applications of this energy harvesting technology are diverse, spanning various sectors, e.g. sustained harvesters for autonomous measurement systems in agriculture. Additionally, this technology can be discreetly integrated into historically significant gardens and spaces. The study's findings highlight the effectiveness of this approach for these specific purposes.