Flexible Lead-Free BiFeO<sub>3</sub>/PDMS-Based Nanogenerator as Piezoelectric Energy Harvester

Ren, Xiaoyong; Fan, Huiqing; Zhao, Yuwei; Liu, Zhiyong

doi:10.1021/acsami.6b04497

Cited by 213 publications

(116 citation statements)

References 51 publications

(66 reference statements)

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“…This implies that the output voltage is mainly originated from the piezoelectric effect. [36,[44][45][46][47][48][49] The average output current density is calculated as ≈10 µA·cm −2 based on the active area. ≈30 µA) are obtained by tapping the paper-based power generator, which is a record-high performance generated by unidirectional force among previous lead-free piezoelectric composite generators as shown in Table 1.…”

Section: Wwwadvelectronicmatdementioning

confidence: 99%

Lead‐Free Bi_0.5(Na_0.78K_0.22)TiO₃ Nanoparticle Filler–Elastomeric Composite Films for Paper‐Based Flexible Power Generators

Won

Kawahara

Ahn

et al. 2019

Adv Elect Materials

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environmental variations such as isolated places, indoors, and dark surroundings. [1][2][3] The mechanical energy for wearable electronics is more reliable and environmentally independent as well as continuous energy source than the solar or the thermal energy, and it is easily convertible to the electrical energy using electromagnetic induction, [4] triboelectric effect, [5] piezoelectric principle, [6] and so forth. Among them, in particular, triboelectric and/or piezoelectric effect-driven energy devices have drawn much higher attentions for future self-powered electronic system than electromagnetic induction-utilized devices due to simple processes, excellent flexibility, high voltage, and power output as well as easy size-scaling, etc. [5][6][7][8][9][10] Since the output power which can be derived from human motion-related activities mainly depends on the operating frequencies and the degree of deformation (i.e., strain), power generators should be composed of highly flexible and durable materials having robust structures. [6,11,12] Among various flexible substrates, the paper, consisting of multiple cellulose fibers, is identified as the most eco-friendly substrate material with very low cost and excellent recyclability. [12][13][14] Furthermore, the use of paper substrates for flexible devices is potentially beneficial for the Key solutions for material selection, processing, and performance of environmentally friendly high-power generators are addressed. High voltage and high power generation of flexible devices using piezoelectric Bi 0.5 (Na 0.78 K 0.22 ) TiO 3 nanoparticle filler-polydimethylsiloxane (PDMS) elastomeric matrix for a lead-free piezoelectric composite film on a cellulose paper substrate is demonstrated. To elucidate the principle of power generation by the piezoelectric composite configuration, the dielectric and piezoelectric characteristics of the composite film are investigated and the results are compared with those of theoretical modeling. The paper-based composite generator produces a large output voltage of ≈100 V and an average current of ≈20 µA (max. ≈30 µA) through tapping stimulation, which is a record-high performance compared to previously reported flexible lead-free piezoelectric composite energy harvesters. Moreover, a triboelectric-hybridized piezoelectric composite device using a micro-patterned PDMS shows a much higher output voltage of ≈250 V and output power of ≈0.5 mW, which drives 300 light-emitting diodes. These results prove that a new class of paper-based and lead-free energy harvesting device provides a strong possibility for enlarging the functionality and the capability of high-power scavengers in flexible and wearable electronics such as sensors and medical devices.One of the best power sources for the human activity-based self-powered wearable electronic devices is the mechanical energy source because it is easily obtained from biological activities or human motions regardless of the location and the

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Section: Wwwadvelectronicmatdementioning

confidence: 99%

Lead‐Free Bi_0.5(Na_0.78K_0.22)TiO₃ Nanoparticle Filler–Elastomeric Composite Films for Paper‐Based Flexible Power Generators

Won

Kawahara

Ahn

et al. 2019

Adv Elect Materials

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“…as well as improving the properties of devices that already use such structures. 3,9,[40][41][42] In this work, high aspect ratio ZnO nanorods were synthesized in a single step using an aqueous solution method by altering the synthesis time and precursor concentration. A p-n junction was assembled by spray-coating a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) film on the top of the ZnO nanorods.…”

Section: Introductionmentioning

confidence: 99%

Control of oxygen vacancies in ZnO nanorods by annealing and their influence on ZnO/PEDOT:PSS diode behaviour

Chen

et al. 2018

J. Mater. Chem. C

137

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a ZnO is one of the most widely studied semiconductors due to its direct wide band gap and high exciton binding energy. Due to its ease of synthesis, robustness and low cost, ZnO has been applied in a wide range of devices, including nanogenerators, solar cells, and photodetectors. In this work, ZnO nanorods were synthesized in a single step using an aqueous method at temperatures below 100 1C. The nanorods were annealed in oxygen and nitrogen and a p-type polymer poly(3,4-ethylenedioxythiophene)polystyrene sulfonate (PEDOT:PSS) was spray coated onto the top of ZnO nanorods to form a p-n junction. The I-V characteristics of the device showed that the annealing atmosphere had a significant effect on the rectification ratio of the device. Further analysis using Mott-Schottky, photoluminescence, and X-ray photoelectron spectroscopy (XPS) indicated that oxygen vacancy concentration correlated well with the free electron density in ZnO as well as the rectification ratio of the p-n junction devices. Devices made with ZnO nanorods annealed in nitrogen had a better rectification ratio than oxygen, representing a simple method to improve p-n junction diode behaviour through tuning the defect properties of the nanorods via controlled annealing.

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“…

demonstrated by using piezoelectric, electrostatic, electromagnetic, and triboelectric mechanisms for vibration energy harvesting. [12][13][14][15][16][17][18] And it is found that piezoelectric materials polyvinylidene fluoride (PVDF) has demonstrated to be the largest piezoelectric constants in polymer. [6][7][8][9][10][11] Piezoelectric nanogenerator (PENG) has been most intensively studied because of its high conversion efficiency and compatible manufacturing process.

…”

mentioning

confidence: 99%

A Hybrid Piezoelectric and Triboelectric Nanogenerator with PVDF Nanoparticles and Leaf‐Shaped Microstructure PTFE Film for Scavenging Mechanical Energy

Zhu

Wang

2017

Adv Materials Inter

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demonstrated by using piezoelectric, electrostatic, electromagnetic, and triboelectric mechanisms for vibration energy harvesting. Even though the harvested power from these methods are small, it is sufficient to power small electronic devices, including light-emitting diodes, laser diodes, pH sensors, speed sensors, and toxic pollutant sensors. [6][7][8][9][10][11] Piezoelectric nanogenerator (PENG) has been most intensively studied because of its high conversion efficiency and compatible manufacturing process. [12][13][14][15][16][17][18] And it is found that piezoelectric materials polyvinylidene fluoride (PVDF) has demonstrated to be the largest piezoelectric constants in polymer. [19][20][21][22] To further this PVDF research for energy harvesting, Lee and co-workers introduced an enhanced piezoelectric energy harvesting by using graphene oxide which output voltage could reach to 4 V. [20] Wang and co-workers reported another enhanced sponge-like piezoelectric using PVDF, however the processing of this prototype is complicated and constrained in lab. [9] Recently, hybrid nanogenerators have attracted more and more attention. [23][24][25] Wang first described a hybrid triboelectric and electromagnetic harvester for the harsh environment. [23] Lee and co-workers reported a broadband nonlinear electromagnetic and triboelectric hybrid energy harvester. [24] However, the existing research using both electromagnetic and triboelectric method could harvest limited power due to the impedance mismatch. In this paper, we proposed a hybrid method using the piezoelectric and triboelectric method for energy harvesting. The designed PENG could greatly enhance the collection efficiency of mechanical energy with PVDF nanoparticles and PVDF/PTFE film, and the leaf-shaped woven fiber benefited the electric output for the TENG. In the end, a random test using finger tap was demonstrated the mechanical energy conversion performance by using eight light-emitting diodes (LED).

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Flexible Lead-Free BiFeO₃/PDMS-Based Nanogenerator as Piezoelectric Energy Harvester

Cited by 213 publications

References 51 publications

Lead‐Free Bi_0.5(Na_0.78K_0.22)TiO₃ Nanoparticle Filler–Elastomeric Composite Films for Paper‐Based Flexible Power Generators

Lead‐Free Bi_0.5(Na_0.78K_0.22)TiO₃ Nanoparticle Filler–Elastomeric Composite Films for Paper‐Based Flexible Power Generators

Control of oxygen vacancies in ZnO nanorods by annealing and their influence on ZnO/PEDOT:PSS diode behaviour

A Hybrid Piezoelectric and Triboelectric Nanogenerator with PVDF Nanoparticles and Leaf‐Shaped Microstructure PTFE Film for Scavenging Mechanical Energy

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Flexible Lead-Free BiFeO3/PDMS-Based Nanogenerator as Piezoelectric Energy Harvester

Cited by 213 publications

References 51 publications

Lead‐Free Bi0.5(Na0.78K0.22)TiO3 Nanoparticle Filler–Elastomeric Composite Films for Paper‐Based Flexible Power Generators

Lead‐Free Bi0.5(Na0.78K0.22)TiO3 Nanoparticle Filler–Elastomeric Composite Films for Paper‐Based Flexible Power Generators

Control of oxygen vacancies in ZnO nanorods by annealing and their influence on ZnO/PEDOT:PSS diode behaviour

A Hybrid Piezoelectric and Triboelectric Nanogenerator with PVDF Nanoparticles and Leaf‐Shaped Microstructure PTFE Film for Scavenging Mechanical Energy

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Flexible Lead-Free BiFeO₃/PDMS-Based Nanogenerator as Piezoelectric Energy Harvester

Lead‐Free Bi_0.5(Na_0.78K_0.22)TiO₃ Nanoparticle Filler–Elastomeric Composite Films for Paper‐Based Flexible Power Generators

Lead‐Free Bi_0.5(Na_0.78K_0.22)TiO₃ Nanoparticle Filler–Elastomeric Composite Films for Paper‐Based Flexible Power Generators