Journal
EUROPEAN POLYMER JOURNAL
Volume 166, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2021.110956
Keywords
Electrospinning; Hybrid PVDF/BiCl3/ZnO nanofibers structure; Piezoelectric nanogenerator (PENG); Piezoelectric properties
Categories
Funding
- National Natural Science Foun-dation of China [51503121]
- Talent Program of Shanghai University of Engineering Science [2018RC54]
- University-Enterprise Cooperation Project [RH-21-00-2-15]
- Science and Technology Commission of Shanghai Municipality [20ZR1408200]
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A unique and highly flexible piezoelectric nanogenerator based on bismuth chloride (BiCl3)/zinc oxide (ZnO)/poly(vinylidene fluoride) (PVDF) nanofibers was prepared using electrospinning technique. It exhibited excellent performance as a highly sensitive self-powered sensor and could detect vital signals.
A unique bismuth chloride (BiCl3)/zinc oxide (ZnO)/poly(vinylidene fluoride) (PVDF) nanofiber-based highly flexible piezoelectric nanogenerator (PENG) is prepared via electrospinning technique. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) are used to characterize the beta-phase content and crystallinity of the PVDF based nanofibers, respectively. Then, we analyze four types nanofiber-based PENG (PVDF, PVDF/ZnO(2%), PVDF/BiCl3(2%), and PVDF/BiCl3/ZnO(2%)) and the influence factors of piezoelectric properties are addressed systematically. It is found that the longitudinal piezoelectric coefficient (d(33)) of PVDF/ BiCl3/ZnO(2%) nanofiber-based PENG is up to 3.8 pC/N and an open-circuit voltage (V-OC) of 12 V is also got. Finally, the practical applicability of the developed PENG is demonstrated by placing it on elbow and knee joint to monitor human body movement, which shows a maximum peak V-OC of 3 V (for elbow) and 0.6 V (for knee) by bending and stretching between specific angles. The high-performance flexible PENG can be used as highly sensitive self-powered sensor, and it also can be used for wearable sensors for detecting some vital signals including breathing, heartbeating, which shows its possible applications in wearable electronics.
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