Abstract
Piezoelectric silicon carbide(SiC)has been quite attractive due to its superior chemical and physical properties as well as wide potential applications.However,the inherent brittleness and unsatisfactory piezoelectric response of piezoelectric semiconductors remain the major obstacles to their diversified ap-plications.Here,flexible multifunctional PVDF/6H-SiC composite fiber films are fabricated and utilized to assemble both piezoelectric nanogenerators(PENGs)and stress/temperature/light sensors.The open cir-cuit voltage(Voc)and the density of short circuit current(Isc)of the PENG based on the PVDF/5 wt％6H-SiC composite fiber films reach 28.94 V and 0.24 pA cm-2,showing a significant improvement of 240％and 300％compared with that based on the pure PVDF films.The effect of 6H-SiC nanoparticles(NPs)on inducing interfacial polarization and stress concentration in composite fiber films is proved by first-principles calculation and finite element analysis.The stress/temperature/light sensors based on the composite fiber film also show high sensitivity to the corresponding stimuli.This study shows that the PVDF/6H-SiC composite fiber film is a promising candidate for assembling high-performance energy har-vesters and diverse sensors.
基金项目
国家杰出青年科学基金(52025041)
国家自然科学基金(51902020)
国家自然科学基金(51974021)
国家自然科学基金(52250091)
中央高校基本科研业务费专项(FRF-TP-20-02C2)
State Key Laboratory of Featured Metal Materials and Lifecycle Safety for Composite Structures,Guangxi University(2021GXYSOF12)
Interdisciplinary Research Project for Young Teachers of USTB(Fundamental Research Funds for the Central Universities)(FRF-IDRY-21-028)
NETL
NSTL
万方数据