Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 6, Pages 5723-5730Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b18259
Keywords
piezoelectric nanofiber; electrospinning; microbead; vacuum packing; energy generator
Funding
- MSIP (Ministry of Science, ICT and Future Planning)
- NST (National Research Council of Science & Technology) of the Republic of Korea [CAP-13-1-KITECH]
- KITECH (Korea Institute of Industrial Technology) internal project
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Here, we present a simple yet highly efficient method to enhance the output performance of a piezoelectric device containing electrospun nanofiber mats. Multiple nanofiber mats were assembled together to harness larger piezoelectric sources in the as-spun fibers, thereby providing enhanced voltage and current outputs compared to those of a single-mat device. In addition to the multilayer assembly, microbead-based electrodes were integrated with the nanofiber mats to deliver a complexed compression and tension force excitation to the piezoelectric layers. A vacuum-packing process was performed to attain a tight and well-organized assembly of the device components even though the total thickness was several millimeters. The integrated piezoelectric device exhibited a maximum voltage and current of 10.4 V and 2.3 mu A, respectively. Furthermore, the robust integrity of the device components could provide high-precision sensitivity to perceive small pressures down to approximately 100 Pa while retaining a linear input-output relationship.
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