Highly Transparent and Flexible All-Nanofiber-Based Piezocomposite Containing BaTiO_(3)-Embedded P(VDF-TrFE)Nanofibers for Harvesting and Monitoring Human Kinetic Movements  

作　　者：Kiyong Kim Daekyu Choi Sangmin Ji Freddy Baltazar Iniguez Young Jae Song Sam S.Yoon Junki Kim Seongpil An 

机构地区：[1]SKKU Advanced Institute of Nanotechnology(SAINT),Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea [2]Department of Nano Science and Technology,Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea [3]Department of Nano Engineering,Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea [4]School of Mechanical Engineering,Korea University,Seoul 02841,Republic of Korea [5]Department of Semiconductor Convergence Engineering,Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea

出　　处：《Advanced Fiber Materials》2024年第5期1369-1386,共18页先进纤维材料（英文）

基　　金：supported by the National Research Foundation of Korea(NRF)grant funded by the Korea Government(MIST)(RS-2023-00211303);Korea Institute for Advancement of Technology(KIAT)Grant funded by the Korea Government(MOTIE)(P0023521,HRD Program for Industrial Innovation).

摘　　要：We developed kinetic energy-harvestable and kinetic movement-detectable piezoelectric nanogenerators(PENGs)consisting of piezoelectric nanofiber(NF)mats and metal-electroplated microfiber(MF)electrodes using electrospinning and electroplating methods.Percolative non-woven structure and high flexibility of the NF mats and MF electrodes allowed us to achieve highly transparent and flexible piezocomposites.A viscoelastic solution,mixed with P(VDF-TrFE)and BaTiO_(3),was electrospun into piezoelectric NFs with a piezoelectric coefficient d33 of 21.2 pC/N.In addition,the combination of electrospinning and elec-troplating techniques enabled the fabrication of Ni-plated MF-based transparent conductive electrodes(TCEs),contributing to the high transparency of the resulting piezocomposite.The energy-harvesting efficiencies of the BaTiO_(3)-embedded NF-based PENGs with transmittances of 86%and 80%were 200 and 240 V/MPa,respectively,marking the highest values in their class.Moreover,the output voltage driven by the coupling effect of piezoelectricity and triboelectricity during finger tapping was 25.7 V.These highly efficient energy-harvesting performances,along with the transparent and flexible features of the PENGs,hold great promise for body-attachable energy-harvesting and sensing devices,as demonstrated in this study.

关 键 词：BaTiO_(3) P(VDF-TrFE) Electrospinning All-nanofiber-based piezoelectric nanogenerator Wearable piezoelectric sensor 

分 类 号：O64[理学—物理化学]