Improved piezoelectricity of polylactide using vitamin B2 for poling-free mechanical and acoustic nanogenerators

Bingya LI, Xiaoran HU*, Qian ZHANG, Xiaoli PENG, Yong XIANG

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

15 Citations (Scopus)

Abstract

In this study, we designed and fabricated a poling-free piezoelectric nanogenerator using bio-based polymer and filler, a poly(l-lactic acid) (PLLA)/vitamin B2 (VB2) composite film. The addition of VB2 to PLLA led to improved crystallinity and enhanced the molecular orientation of PLLA, resulting in a significantly enhanced output performance of the PLLA/VB2 nanogenerator. The proposed nanogenerator provides a maximum power density of 75.68 mW cm−3, which is approximately 28.7 times higher than that of pure PLLA nanogenerator. Moreover, the PLLA/VB2 nanogenerator exhibits good electrical responses under both mechanical and acoustic stimulations. The collected mechanical energy from the motion of human joints can power up several LEDs. The PLLA/VB2 nanogenerator can sensitively detect sound frequency from 1 to 27 kHz. Thus, it has great application potential in ambient mechanical and acoustic energy harvesting, wearable devices, and human–machine controlling systems.

Original languageEnglish
Pages (from-to)902-912
Number of pages11
JournalJournal of Materials Science
Volume56
Issue number1
Early online date14 Sept 2020
DOIs
Publication statusPublished - Jan 2021
Externally publishedYes

Bibliographical note

This work was supported by “the Fundamental Research Funds for the Central Universities” No. ZYGX2019Z009.

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