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Wearable Piezoelectric Nanogenerators Based on Core-Shell Ga-PZT@GaOxNanorod-Enabled P(VDF-TrFE) Composites

Journal Article


Abstract


  • High-output flexible piezoelectric nanogenerators (PENGs) have achieved great progress and are promising applications for harvesting mechanical energy and supplying power to flexible electronics. In this work, unique core-shell structured Ga-PbZrxTi1-xO3 (PZT)@GaOx nanorods were synthesized by a simple mechanical mixing method and then were applied as fillers in a poly(vinylidene fluoride-Trifluoroethylene) (P(VDF-TrFE)) matrix to obtain highly efficient PENGs with excellent energy-harvesting properties. The decoration of gallium nanoparticles on PZT @GaOx nanorods can amplify the local electric field, facilitate the increment of polar ��-phase fraction in P(VDF-TrFE), and strengthen the polarizability of PZT and P(VDF-TrFE). The interfacial interactions of GaOx and P(VDF-TrFE) are also in favor of an increased ��-phase fraction, which results in a remarkable improvement of PENG performance. The optimized Ga-PZT@GaOx/P(VDF-TrFE) PENG delivers a maximum open-circuit voltage of 98.6 V and a short-circuit current of 0.3 ��A with 9.8 ��W instantaneous power under a vertical force of 12 N at a frequency of 30 Hz. Such a PENG exhibits a stable output voltage after 6��000 cycles by the durability test. Moreover, the liquid gallium metal offers a mechanical matching interface between rigid PZT and the soft polymer matrix, which benefits the effective, durable mechanical energy-harvesting capability from the physical activities of elbow joint bending and walking. This research renders a deep association between a liquid metal and piezoelectric ceramics in the field of piezoelectric energy conversion, offering a promising approach toward self-powered smart wearable devices.

UOW Authors


  •   Du, Yi
  •   Ren, Long (external author)

Publication Date


  • 2022

Citation


  • Zeng, S., Zhang, M., Jiang, L., Wang, Z., Gu, H., Xiong, J., . . . Ren, L. (2022). Wearable Piezoelectric Nanogenerators Based on Core-Shell Ga-PZT@GaOxNanorod-Enabled P(VDF-TrFE) Composites. ACS Applied Materials and Interfaces, 14(6), 7990-8000. doi:10.1021/acsami.1c22877

Scopus Eid


  • 2-s2.0-85124296009

Start Page


  • 7990

End Page


  • 8000

Volume


  • 14

Issue


  • 6

Place Of Publication


Abstract


  • High-output flexible piezoelectric nanogenerators (PENGs) have achieved great progress and are promising applications for harvesting mechanical energy and supplying power to flexible electronics. In this work, unique core-shell structured Ga-PbZrxTi1-xO3 (PZT)@GaOx nanorods were synthesized by a simple mechanical mixing method and then were applied as fillers in a poly(vinylidene fluoride-Trifluoroethylene) (P(VDF-TrFE)) matrix to obtain highly efficient PENGs with excellent energy-harvesting properties. The decoration of gallium nanoparticles on PZT @GaOx nanorods can amplify the local electric field, facilitate the increment of polar ��-phase fraction in P(VDF-TrFE), and strengthen the polarizability of PZT and P(VDF-TrFE). The interfacial interactions of GaOx and P(VDF-TrFE) are also in favor of an increased ��-phase fraction, which results in a remarkable improvement of PENG performance. The optimized Ga-PZT@GaOx/P(VDF-TrFE) PENG delivers a maximum open-circuit voltage of 98.6 V and a short-circuit current of 0.3 ��A with 9.8 ��W instantaneous power under a vertical force of 12 N at a frequency of 30 Hz. Such a PENG exhibits a stable output voltage after 6��000 cycles by the durability test. Moreover, the liquid gallium metal offers a mechanical matching interface between rigid PZT and the soft polymer matrix, which benefits the effective, durable mechanical energy-harvesting capability from the physical activities of elbow joint bending and walking. This research renders a deep association between a liquid metal and piezoelectric ceramics in the field of piezoelectric energy conversion, offering a promising approach toward self-powered smart wearable devices.

UOW Authors


  •   Du, Yi
  •   Ren, Long (external author)

Publication Date


  • 2022

Citation


  • Zeng, S., Zhang, M., Jiang, L., Wang, Z., Gu, H., Xiong, J., . . . Ren, L. (2022). Wearable Piezoelectric Nanogenerators Based on Core-Shell Ga-PZT@GaOxNanorod-Enabled P(VDF-TrFE) Composites. ACS Applied Materials and Interfaces, 14(6), 7990-8000. doi:10.1021/acsami.1c22877

Scopus Eid


  • 2-s2.0-85124296009

Start Page


  • 7990

End Page


  • 8000

Volume


  • 14

Issue


  • 6

Place Of Publication