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Projects: Projects for Investigator
Reference Number EP/X026582/1
Title Flexoelectricity for green energy batteries
Status Started
Energy Categories Other Power and Storage Technologies(Energy storage) 100%;
Research Types Basic and strategic applied research 100%
Science and Technology Fields ENGINEERING AND TECHNOLOGY (Electrical and Electronic Engineering) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Dr D Dini
No email address given
Department of Mechanical Engineering
Imperial College London
Award Type Standard
Funding Source EPSRC
Start Date 21 August 2023
End Date 20 August 2025
Duration 24 months
Total Grant Value £204,031
Industrial Sectors
Region London
Programme UKRI MSCA
 
Investigators Principal Investigator Dr D Dini , Department of Mechanical Engineering, Imperial College London (100.000%)
Web Site
Objectives
Abstract The booming development of innovative technologies, such as portable electronics and sensors, is increasing the demand for renewable power supplies. To meet this demand triboelectric nanogenerators (TENGs) have been recently proposed. TENGs are green energy-harvesting devices that convert mechanical energy into electricity by coupling triboelectricity and electrostatic induction. They can charge batteries and provide energy to self-powered electronics and sensors used for a wide range of applications. This versatility makes TENGs key devices to replace fossil energy and drive the green transition.Their application, however, still faces limitations because once the electronic saturation point is reached the electric output starts to decrease. EXCITON aims at enhancing TENGs performances by exploiting electromechanical effects such as flexoelectricity. Flexoelectricity refers to the generation of electric polarization caused by strain gradients, which are large at the nanoscale and in flexible 2D and polymeric materials, widely used in TENGs fabrication.These effects are strongly enhanced in tribological contact, where high non-uniform stresses can be exploited to increase the electric output and TENGs performance. Indeed, it has been recently suggested that flexoelectricity drives triboelectrification.Providing a fundamental understanding of the interplay between flexo and triboelectricity, EXCITON aims to determine a sound method to permanently improve TENGs performances. I will evaluate the effect of non-uniform deformations on the tribocharging of 2D and polymeric materials by combining ab-initio DFPT and experimental tribometric and KPFM measurements of the electromechanical and triboelectric properties of these materials. The combined theoretical/experimental approach will allow to establish a new protocol for the studies in the field and will constitute a first step towards the application of the outcomes.
Publications (none)
Final Report (none)
Added to Database 20/09/23