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Fabrication of triboelectric nanogenerators based on electrospun polyimide nanofibers membraneopen access

Authors
Kim, YeongjunWu, XinweiOh, Je Hoon
Issue Date
Feb-2020
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.10, no.1, pp 1 - 10
Pages
10
Indexed
SCIE
SCOPUS
Journal Title
SCIENTIFIC REPORTS
Volume
10
Number
1
Start Page
1
End Page
10
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/1271
DOI
10.1038/s41598-020-59546-7
ISSN
2045-2322
Abstract
Surface modification of polyimides (PIs) using electrospinning would significantly improve the performance of TENGs because of the larger surface area of the electrospun friction layer. However, PIs generally have high solvent resistance, so it is complicated to convert them into nanofibers using electrospinning process. This study aims to fabricate PI nanofibers via simple, one-step electrospinning and utilize them as a friction layer of TENGs for better performance. PI nanofibers were directly electrospun from PI ink made of polyimide powder without any additional process. The effect of PI concentration on spinnability was investigated. Uniform and continuous nanofibrous structures were successfully produced at concentrations of 15 wt% and 20 wt%. Electrospun PI nanofibers were then utilized as a friction layer for TENGs. A TENG with 20 wt% produced an open circuit voltage of 753 V and a short circuit current of 10.79 mu A and showed a power density of 2.61 W m(-2) at a 100 M Omega load resistance. During tapping experiment of 10,000 cycles, the TENG could stably harvest electrical energy. The harvested energy from the proposed TENG is sufficient to illuminate more than 55 LEDs and drive small electronic devices, and the TENGs exhibit excellent performance as a wearable energy harvester.
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COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MECHANICAL ENGINEERING > 1. Journal Articles

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Oh, Je Hoon
ERICA 공학대학 (DEPARTMENT OF MECHANICAL ENGINEERING)
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