PVDF/6H-SiC composite fiber films with enhanced piezoelectric performance by interfacial engineering for diversified applications  

作　　者：Linlin Zhou Tao Yang Chunyu Guo Kang Wang Enhui Wang Laipan Zhu Hailong Wang Sheng Cao Kuo-Chih Chou Xinmei Hou 

机构地区：[1]Institute for Carbon Neutrality,University of Science and Technology Beijing,Beijing 100083,China [2]Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 101400,China [3]School of Materials Science Engineering,Zhengzhou University,Zhengzhou 450001,China [4]State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi University,Nanning 530004,China

出　　处：《Journal of Materials Science & Technology》2024年第3期238-245,共8页材料科学技术（英文版）

基　　金：supported by the National Science Fund for Distinguished Young Scholars(No.52025041);the National Natural Science Foundation of China(Nos.51902020,51974021,and 52250091);the Fundamental Research Funds for the Central Universities of NO.FRF-TP-20-02C2;This project is supported by the S tate Key Laboratory of Featured Metal Materials and Lifecycle Safety for Composite Structures,Guangxi University(Grant No.2021GXYSOF12);the Interdisciplinary Research Project for Young Teachers of USTB(Fundamental Research Funds for the Central Universities)(No.FRF-IDRY-21-028).

摘　　要：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 applications.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(V_(oc))and the density of short circuit current(I_(sc))of the PENG based on the PVDF/5 wt%6H-SiC composite fiber films reach 28.94 V and 0.24μA 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 harvesters and diverse sensors.

关 键 词：6H-SIC PVDF Multifunctional composite fiber film Energy harvester Stress/temperature/light sensor 

分 类 号：TB3[一般工业技术—材料科学与工程]