Mechanical Energy Harvesting Behaviour Of Soft Polymeric Materials

Piezoelectric principle is one of the popular choices when it comes to mechanical energy recovery and conversion of energy into electrical energy which can be either stored or used straightaway. In general, ceramic-based piezoelectric materials like Lead Zirconate Titanate (PZT) had been the popular choice for piezoelectric devices even though they are brittle in nature and found to be toxic in long uses. At the same time, organic-based Polyvinylidene Fluoride (PVDF) and similar polymeric materials have been used in different applications with an offer of flexibility, lightweight and biocompatibility. One major factor dragging down the usage of organic materials in piezoelectric applications is their poor piezoelectric responses. In this work, authors are reporting the enhanced piezoelectric properties of nanofibers of PVDF in composite with copper nanoparticles and Multiwalled Carbon Nanotubes (MWCNTs). Fourier Transformation Infrared (FTIR) analysis has been carried out for nanofibers and was able to prove the higher beta phase conversion of PVDF in composite nanofibers when compared with pristine nanofibers. Composite nanofibers were later fabricated into a piezoelectric device with two electrodes and have shown a peak voltage of 6.78 V upon a drop test. As a proof of concept, the mentioned piezoelectric device was integrated into a shoe-based prototype where it has shown 18–20[Formula: see text]V energy harvesting upon walking at leisurely pace.

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Design of Polymeric Materials for Triboelectric Nanogenerators (TENGs)

Physics and High Technology ◽

10.3938/phit.30.003 ◽

2021 ◽

Vol 30 (1/2) ◽

pp. 12-19

Author(s):

Woongbi CHO ◽

Jeong Jae WIE

Keyword(s):

Energy Harvesting ◽

Mechanical Energy ◽

Polymeric Materials ◽

Electrical Energy ◽

Dielectric Constants ◽

Polymer Materials ◽

Harvesting Systems ◽

Triboelectric Nanogenerators ◽

Materials Used ◽

The Relationship

Triboelectric nanogenerators (TENGs) are eco-friendly energy-harvesting systems that produce electrical energy from disordered mechanical energy. To enhance the triboelectric performances of TENGs, many researchers have conducted in-depth studies of the polymer materials utilized in TENGs, so numerous studies have been reported on the relationship between their material properties and their energy-harvesting capabilities. Triboelectric performance depends on the electrical properties of the materials used, such as their electron affinities and dielectric constants. Representative examples of positive and negative tribomaterials include PA6, PEO, PVDF, and fluorinated sulfur copolymers, respectively. This article introduces the relationship among the compositions, structures, triboelectric performances of the polymer materials, and composites used in TENGs and summarizes the representative polymer materials applied in the latest TENGs.

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Low-Cost, High-Performance Piezoelectric Nanocomposite for Mechanical Energy Harvesting

IEEE Sensors Journal ◽

10.1109/jsen.2021.3100869 ◽

2021 ◽

pp. 1-1

Author(s):

Nadeem Tariq Beigh ◽

Dhiman Mallick

Keyword(s):

Energy Harvesting ◽

High Performance ◽

Low Cost ◽

Mechanical Energy

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Retraction: A bio-based piezoelectric nanogenerator for mechanical energy harvesting using nanohybrid of poly(vinylidene fluoride)

Nanoscale Advances ◽

10.1039/d0na90066d ◽

2021 ◽

Author(s):

Anna Rulka

Keyword(s):

Energy Harvesting ◽

Vinylidene Fluoride ◽

Mechanical Energy ◽

Poly Vinylidene Fluoride

Retraction for ‘A bio-based piezoelectric nanogenerator for mechanical energy harvesting using nanohybrid of poly(vinylidene fluoride)’ by Pralay Maiti et al., Nanoscale Adv., 2019, 1, 3200–3211, DOI: 10.1039/C9NA00214F.

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