In:
Nanotechnology, IOP Publishing, Vol. 32, No. 14 ( 2021-04-02), p. 145401-
Abstract:
Coaxial type piezoelectric energy generator (C-PEG) nanofiber was fabricated by a self-designed continuous electrospinning deposition system. Piezoelectric PVDF-TrFE nanofiber as an electroactive material was electrospun at a discharge voltage of 9–12 kV onto a simultaneously rotating and transverse moving Cu metal wire at an angular velocity of ω g = 60–120 RPM. The piezoelectric coefficient d 33 of the PVDF-TrFE nanofiber was approximately −20 pm V −1 . The generated output voltage ( V G ) increased according to the relationship exp(- α P ) ( α = 0.41– 0.57) as the pressure ( P ) increased from 30 to 500 kpa. The V G values for ten and twenty pieces of C-PEG were V G = 3.9 V and 9.5 V at P = 100 kpa, respectively, relatively high output voltages compared to previously reported values. The high V G for the C-PEG stems from the fact that it can generate a fairly high V G due to the increased number of voltage collection points compared to a conventional two-dimensional (2-dim) capacitor type of piezoelectric film or fiber device. C-PEG yarn was also fabricated via the dip-coating of a PDMS polymer solution, followed by winding with Ag-coated nylon fiber as an outer electrode. The current and power density of ten pieces of C-PEG yarn were correspondingly 22 nA cm −2 and 8.6 μ W cm −3 at V G = 1.97 V, higher than previously reported values of 5.54 and 6 μ W cm −3 . The C-PEG yarn, which can generate high voltage compared to the conventional film/nanofiber mat type, is expected to be very useful as a wearable energy generator system.
Type of Medium:
Online Resource
ISSN:
0957-4484
,
1361-6528
DOI:
10.1088/1361-6528/abd57e
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2021
detail.hit.zdb_id:
1362365-5
SSG:
11
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