Work

Significantly Enhanced Piezoelectricity of Poly(Vinylidene Fluoride) via Orienting Nanobound State Ions

Year: 2024

Type: article

Abstract: Poly(vinylidene fluoride) (PVDF) demonstrates great potential for applications in flexible sensing and energy harvesting but the piezoelectric coefficient is less than 30 pm V −1 even with the full beta phase. Herein, an all‐organic composite of PVDF with ionic liquid (IL) is manufactured through stretching, constrained annealing, and polarization. The DFT and XPS indicate strong ionic dipole interactions between PVDF and IL, favoring the orientation and crystallization of PVDF. Surprisingly, the nanobound states ions achieve orientation in different physical fields, providing ionic dipole enhances the piezoelectricity of the composite films, confirmed by variable temperature dielectric properties, FTIR and XRD. An inverse piezoelectric coefficient of 51.8 pm V −1 , obtained from PVDF containing 0.75 wt.% IL, improved by 116% compared to commercial PVDF (≈24 pm V −1 ). This work presents a novel composite strategy for the fabrication of high piezoelectric flexible polymers.

Source: Advanced Materials Technologies

DOI: 10.1002/admt.202401447

Authors: Zhiwei Ye, Juan Yi, Yibo Zhang, Chuanxi Xiong

Institutions: Wuhan University of Technology, State Key Laboratory of Silicate Materials for Architecture

Language: English

Topic: Dielectric materials and actuators

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: Innovative Research Group Project of the National Natural Science Foundation of China, National Natural Science Foundation of China

Awards: G3753667628, G5169464092