首页|Beta-phase transformation of polyvinylidene fluoride with supersonically sprayed ZnSnO3 cuboids for flexible piezoelectric nanogenerators

Beta-phase transformation of polyvinylidene fluoride with supersonically sprayed ZnSnO3 cuboids for flexible piezoelectric nanogenerators

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Flexible self-powered electromechanical devices,such as piezoelectric nanogenerators(PENGs),which are used in wearable and implantable devices,are emerging as state-of-the-art clean energy sources.In this study,a scalable supersonic spraying technique was used to prepare flexible piezocomposite films of polyvinylidene fluoride(PVDF)and hydrothermally synthesized ZnSnO3(ZSO)cubes for PENGs.Raman spectra confirmed that the transformation of the α-phase of PVDF to its β-phase was induced by the shear stress generated between the ZSO particles and PVDF polymer during supersonic spraying.The op-timized sample comprising 0.43 g of ZSO cubes and 1 g of PVDF produced a maximum piezopotential of 41.5 V and a short-circuit current,Isc,of 52.5 μA.A maximum power density of 50.6 μW cm-2 was ob-tained at a loading resistance of 0.4 MΩ,which matched the impedance of the PENG.Long-term tapping and bending cycles of Ntap=4200 and Nbend=600 yielded piezopotentials of 40.5 and 1.7 V,respectively.In addition,electrical poling for 2 h increased the piezopotential to 52 V owing to the alignment of the ferroelectric dipoles in the PVDF.

ZnSnO3PVDFCompositePerovskiteSupersonic cold sprayPiezoelectric nanogenerator

Bhavana Joshi、Taegun Kim、Woojin Lim、Edmund Samuel、Chanwoo Park、Ali Aldalbahi、Mohamed El-Newehy、Hae-Seok Lee、Seongpil An、Sam S.Yoon

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School of Mechanical Engineering,Korea University,Seoul 02841,Republic of Korea

Core Component Technology Team,Samsung Electronics Co Ltd.Mobile R&D Center,Samsung-ro,Suwon-si,Gyeonggi-do,Republic of Korea

Energy Environment Policy and Technology,Graduate School of Energy and Environment(KU-KIST Green School),Korea University,Seoul 02841,Republic of Korea

Department of Chemistry,College of Science,King Saud University,Riyadh 11451,Saudi Arabia

SKKU Advanced Institute of Nanotechnology(SAINT),Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea

Department of Nano Science and Technology,Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea

Department of Nano Engineering,Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea

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National Research Foundation of Korea(NRF)Grant funded by the Korea government(MSIT)National Research Foundation of Korea(NRF)Grant funded by the Korea government(MSIT)King Saud University,Riyadh,Saudi Arabia,for funding this work through Researchers Supporting Project

NRF-2020R1A5A10181532022M3J1A106422611RSP2023R30

2024

10.1016/j.jmst.2023.07.063

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.177(10)
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