The study designed and fabricated a flexible self-powered sensor based on polyvinylidene fluoride-trifluoroethylene/Fe3O4 (PVDF-TrFE/Fe3O4),which was designed with a serpentine stretchable structure to enhance its mechanical performance and adaptability.The electrode part utilized screen printing technology to create flexible and stretchable electrodes,ensuring excellent conductivity and flexibility.The sensor substrate and electrode substrate materials were made of polydimethylsiloxane (PDMS) with different ratios of main agents and curing agents to meet the requirements for strong mechanical tensile properties.Through a bridge rectifier circuit,the conversion and collection of mechanical energy into electrical energy were achieved,and successfully applied in the fields of energy harvesting and information collection.The study also investigated the effects of temperature and frequency on the system,and conducted experiments on energy capture and self-powered motion signal acquisition.The experimental results demonstrated that the sensor could simultaneously power multiple LED lights and acquire various motion signals,showing broad application prospects in wearable devices,health monitoring,and human-computer interaction.
[1] Fahad M,Waqar A,Kim B.Effective-performance of inorganic and organic (barium zirconium titanate/polyvinylidene fluoride) piezoelectric composite for energy harvesting and self-powered smart IoT-based electronics[J].Journal of Alloys and Compounds,2024,985:174033.
[2] Liu R Y,Kuang X J,Deng J N,et al.Shape memory polymers for body motion energy harvesting and self-powered mechanosensing[J].Advanced Materials,2018,30(8):1705195.
[3] Dong K,Deng J,Ding W,et al.Versatile core-sheath yarn for sustainable biomechanical energy harvesting and real-time human interactive sensing[J].Advanced Energy Materials,2018,8(23):1801114.
[4] Jin L,Ma S,Deng W,et al.Polarization-free high-crystallization β-PVDF piezoelectric nanogenerator toward self-powered 3D acceleration sensor[J].Nano Energy,2018,50:632-638.
[5] Adiguzel S P,Ercan N.High performance piezoelectric nanogenerators based on polyvinylidene fluoride-graphene nanoribbon composite thin films[J].Macromolecular Rapid Communications,2024,45(19):R175-R195.
[6] Anton S R,Sodano H.A review of power harvesting using piezoelectric materials[J].Smart Materials and StructuresTM,2007,16(3):r1-r21.
[7] Cook-chennault K A,Thambi N,Sastry A M.Powering MEMs portable devices-a review of non-regenerative and regenerative power supply systems with special emphasis on piezoelectric energy harvesting systems[J].Smart Materials and StructuresTM,2008,17:1-33.
[8] Tian H Y,Chen H,Liu C,et al.Serpent-inspired multimodal flexible sensor for multi-signal measurement based on PVDF-TrFE/Fe3O4 nanofibers[J].Measurement,2024,236:115074.
[9] Wang Z L,Jiang T,Xu L.Toward the blue energy dream by triboelectricnanogenerator networks[J].Nano Energy,2017,39:9-23.
[10] Wang Z L.On Maxwell's displacement current for energy and sensors:the originof nanogenerators[J].Materials Today,2017,20(2):74-82.
[11] Wang Z L.On the first principle theory of nanogenerators from maxwell's equations[J].Nano Energy,2020,68:104272.
[12] Maxwell J C.On physical lines of force[J].Philosophical Magazine and Journal of Science,2009,21(139):161-175.
[13] Wang Z L.On the first principle theory of nanaogenerators from Maxwell's equations[J].Nano Energy,2020,68:104272.
[14] Parali L,Tatardar F,Koc M,et al.The piezoelectric response of electrospun PVDF/PZT incorporated with pristine graphene nanoplatelets for mechanical energy harvesting[J].Journal of Materials Science-Materials in Electronics,2024,35(1):41.
[15] Bhattacharya D,Mukherjee S,Pal A N,et al.Two-dimensional MoxW1-xS2 alloys for nanogenerators producing record piezo-output and coupled photodetectors for self-powered uv sensor[J].Advanced Optical Materials,2022,10(15):2200353.
[16] Briscoe J,Jalali N,Woolliams P,et al.Measurement techniques for piezoelectric nanogenerators[J].Energy & Environmental Science,2013,6:3035-3045.
[17] Park K I,Son J H,Hwang G T,et al.Highly efficient,flexible piezoelectric PZT thin film nanogenerator on plastic substrates[J].Advanced Materials,2014,26:2514-2520.
[18] Bodkhe S,Turcot G,Gosselin F P,et al.One-step solvent evaporation assisted 3D printing of piezoelectric PVDF nanocomposite structures[J].ACS Applied Materials & Interfaces,2017,9:20833-20842.
[19] Zhang C,Fan Y,Li H,et al.Fully rollable lead-free poly(vinylidene fluoride)-niobate-based nanogenerator with ultra-flexible nano-network electrodes[J].ACS Nano,2018,12:4803-4811.
[20] Kang H B,Han C S,Pyun J C,et al.(Na,K)NbO3 nano particle-embedded piezoelectric nanofiber composites for flexible nanogenerators[J].Composites Science and Technology,2015,111:1-8.
[21] Choi M,Murillo G,Hwang S,et al.Mechanical and electrical characterization of PVDF-ZnO hybrid structure for application to nanogenerator[J].Nano Energy,2017,33:462-468.
[22] Adhikary P,Mandal D.Enhanced electro-active phase in a luminescent P(VDF-HFP)/Zn2+ flexible composite film for piezoelectric based energy harvesting applications and self-powered UV light detection[J].Physical Chemistry Chemical Physics,2017,19:17789-17798.
[23] Siddiqui S,Lee H B,Kim D I,et al.An omnidirectionally stretchable piezoelectric nanogenerator based on hybrid nanofibers and carbon electrodes for multimodal straining and human kinematics energy harvesting[J].Advanced Energy Materials,2018,8:1701520.
基金资助
中央引导地方科技发展资金项目(TDZJSX2024B004);山西省基础研究计划联合资助项目(TZLH20230818010)
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