Jump to main content
Jump to site search

Issue 34, 2018
Previous Article Next Article

High-performance piezoelectric-energy-harvester and self-powered mechanosensing using lead-free potassium–sodium niobate flexible piezoelectric composites

Author affiliations

Abstract

Lead-free piezoelectric materials have recently drawn extensive attention because of their high piezoelectric properties and for being harmless to the human body. We explored a high-output flexible lead-free piezoelectric nanogenerator (PENG) based on new inorganic piezoelectric 0.91K0.48Na0.52NbO3–0.04Bi0.5Na0.5ZrO3–0.05AgSbO3–0.2% Fe2O3 (KNN–BNZ–AS–Fe) particles for the first time and which had an ultrahigh piezoelectric coefficient (d33) of ∼500 pC N−1. The PENG was fabricated from KNN–BNZ–AS–Fe particles and a PDMS matrix, and exhibited a linear relation between the output voltage and input pressure within a certain pressure range. An optimal output with a large recordable open-circuit voltage (VOC) of 52 V and a short-circuit (ISC) current of 4.8 μA was obtained under a vertical force of 25 N at 2 Hz. The PENG was demonstrated to be able to successfully drive commercial light emitting diodes (LEDs) without any storage unit, which suggests that the biocompatible KNN–BNZ–AS–Fe-based PENG has realistic application prospects as a power source. Furthermore, the PENG could also potentially be utilized as a mechanical sensing counter and in collision alarm equipment. This work provides a new direction for lead-free piezoelectric materials in the field of self-powered mechanosensation for potential applications in areas such as artificial intelligence, soft robotics, and biomedical devices.

Graphical abstract: High-performance piezoelectric-energy-harvester and self-powered mechanosensing using lead-free potassium–sodium niobate flexible piezoelectric composites

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Jun 2018, accepted on 27 Jul 2018 and first published on 31 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA05887C
Citation: J. Mater. Chem. A, 2018,6, 16439-16449
  •   Request permissions

    High-performance piezoelectric-energy-harvester and self-powered mechanosensing using lead-free potassium–sodium niobate flexible piezoelectric composites

    M. Wu, T. Zheng, H. Zheng, J. Li, W. Wang, M. Zhu, F. Li, G. Yue, Y. Gu and J. Wu, J. Mater. Chem. A, 2018, 6, 16439
    DOI: 10.1039/C8TA05887C

Search articles by author

Spotlight

Advertisements