Flexoelectricity in Flexoionic Polymer Electrolyte Membranes: Effect of Thiosiloxane Modification on Poly(ethylene glycol) Diacrylate and Ionic Liquid Electrolyte Composites

• DOI: 10.1021/acsami.0c02328
• Publication Date: 2020-03-26T20:39:30Z
• Authors: Camilo Rendon Pie...; Peijing Yue; Jinwei Cao; Heather Lee; Chathuranga Prage...; Chenrun Feng; Antal Jákli; Thein Kyu
• Keywords: Flexoelectricity

The present article entails the generation of flexoelectricity during cantilever bending a solid polymer electrolyte membrane (PEM), composed poly(ethylene glycol) diacrylate (PEGDA) precursor and ionic liquid (hexylmethylimidazolium hexafluorophosphate). effects thiosiloxane modification PEGDA on glass transition, conductivity, flexoelectric performance have been explored as function PEM composition. transition temperature (Tg) declines with increasing amount in co-network, while conductivity improves. PEM/compliant carbonaceous electrodes assemblies were assembled to determine coefficients by monitoring electrical voltage/current outputs for various compositions under intermittent square-wave dynamic oscillatory sine-wave deformation modes. Of particular interest is that room coefficient exhibits strong frequency dependence vicinity 0.01-10 Hz, suggesting ion polarization transport through ion-dipole complexed networks can still be affected mobile side chain branches even elastic regime covalently bonded network. in-depth understanding effect anticipated impact development mechanoelectrical energy conversion devices harvesting applications from natural dynamical environment.