An improved method for piezoelectric characterization of polymers for energy harvesting applications

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Gusarova, E.^3 ; Gusarov, B.^1,2 ; Zakharov, D.^1,2 ; Bousquet, M.^3 ; Viala, B.^3 ; Cugat, O.^1,2 ; Delamare, J.^1,2 ; Gimeno, L.^1,2

G2Elab, University Grenoble Alpes, Grenoble, F38000, France^1

CNRS, University Grenoble Alpes, Grenoble, F38000, France^2

CEA, LETI, MINATEC Campus, Grenoble, F38000, France^3

关键词: Discharge measurements;    Electrostatic voltmeter;    Four point bending;    Mechanical switch;    Open circuit conditions;    Piezoelectric measurements;    Piezoelectric voltage;    Polyvinylidene fluorides;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012061/pdf
DOI  :  10.1088/1742-6596/476/1/012061

来源: IOP

【 摘 要 】

This work presents an improved method for measuring the direct piezoelectric voltage and energy of flexible polymers. Well-controlled stress is applied with a four-point bending system and voltage is measured in real open-circuit conditions. The presented method separates the piezoelectric part from the measurement part by introducing a mechanical switch, allowing instantaneous post-deformation discharge measurements. Oscilloscope and contact-less electrostatic voltmeter are compared. Direct piezoelectric measurements under open-circuit conditions have been performed on commercial PVDF (polyvinylidene fluoride) and its copolymers. Significant differences to data sheet values (close-circuit conditions) are reported and commented.