Lead-Free NaNbO<sub>3</sub> Nanowires for a High Output Piezoelectric Nanogenerator

Jung, Jong Hoon; Lee, Minbaek; Hong, Jungil; Ding, Y.; Chen, Chih-Yen; Chou, Li‐Wei; Wang, Zhong Lin

doi:10.1021/nn2039033

Cited by 446 publications

(313 citation statements)

References 30 publications

Supporting

Mentioning

303

Contrasting

Unclassified

Order By: Relevance

“…Based on this phenomenon, piezoelectric NGs were first demonstrated using ZnO nanowires (NWs) [7][8][9]. Since then, many nanogenerator studies have focused on rigid piezoelectric ceramic materials such as PZT [10], ZnO [9,11], GaN [12], NaNbO 3 [13], etc. However, NGs in operation are required to sustain continuous and periodic mechanical deformations, such as pressing, stretching or bending, which is often incompatible with the brittle nature of inorganic or ceramic piezoelectrics, giving rise to mechanical failure and/or degradation of NG performance over time.…”

Section: Piezoelectric Polymersmentioning

confidence: 99%

Nanostructured polymer-based piezoelectric and triboelectric materials and devices for energy harvesting applications

Jing

Kar‐Narayan

2018

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Harvesting energy from ambient mechanical sources in our environment has attracted considerable interest due to its potential to power applications such as ubiquitous wireless sensors and Internet of Things devices. In this context, piezoelectric and/or triboelectric materials offer a relatively simple means of directly converting mechanical energy from ubiquitous ambient vibrating sources into electrical power for microscale/nanoscale device applications. In particular, nanoscale energy harvesters, or nanogenerators, are capable of converting low-level ambient vibrations into electrical energy, thus are vital to the realization of the next generation of self-powered devices. Polymer-based nanogenerators are attractive as they are inherently flexible and robust, making them less prone to mechanical failure which is a key requirement for vibrational energy harvesters. They are also lightweight, easy and cheap to fabricate, lead-free and biocompatible, but in many cases their energy harvesting performance is found lacking in comparison to more commonly studied inorganic materials. Recent advances have been made in developing scalable nanofabrication techniques for flexible and low-cost polymer-based nanogenerators with improved energy conversion efficiency, including the incorporation of high-quality polymer nanowires with enhanced crystallinity, piezoelectric and/or surface charge properties. In this review, we discuss aspects of nanomaterials growth and energy harvester device design, including those involving nanowires of polymers of polyvinylidene fluoride and its co-polymers, nylon-11, and poly-lactic acid for scalable piezoelectric and triboelectric nanogenerator applications, as well as the design and performance of polymer-ceramic nanocomposite nanogenerators. In particular, we highlight the effects of growth parameters, nanoconfinement, self-poling, surface polarization, crystalline phases, and device assembly on the energy harvesting performance of a range of recently reported nanostructured polymer-based materials and devices.

show abstract

Section: Piezoelectric Polymersmentioning

confidence: 99%

Nanostructured polymer-based piezoelectric and triboelectric materials and devices for energy harvesting applications

Jing

Kar‐Narayan

2018

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…10,11 Importantly, the NaNbO 3 nanowires are very long, ranging from tens to hundreds of micrometer and have high piezoelectricity. 11 To improve the piezoelectricity of NaNbO 3 nanowires for nanogenerator and actuator applications, 12 the in situ investigation on the crystallization should be very important. 9,13−15 In this paper, we utilized in situ transmission electron microscopy (TEM) in real time at atomic resolution to investigate the phase transformation from Na 2 Nb 2 O 6 −H 2 O to NaNbO 3 with the increase of temperature.…”

Section: Introductionmentioning

confidence: 99%

In Situ Observation of Dehydration-Induced Phase Transformation from Na₂Nb₂O₆–H₂O to NaNbO₃

Jung

Chen

et al. 2012

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

ABSTRACT:We have monitored the phase transformation from a Sandia octahedral molecular sieve Na 2 Nb 2 O 6 −H 2 O to a piezoelectric NaNbO 3 nanowire through in situ X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements at high temperatures. After dehydration at 288°C, the Na 2 Nb 2 O 6 −H 2 O becomes significantly destabilized and transforms into NaNbO 3 with the increase of time. The phase transformation time is exponentially proportional to the inverse of temperature, for example, ∼10 5 s at 300°C and ∼10 1 s at 500°C, and follows an Arrhenius equation with the activation energy of 2.0 eV. Real time TEM investigation directly reveals that the phase transformation occurs through a thermally excited atomic rearrangement due to the small difference of Gibbs free energy between two phases. This work may provide a clue of kinetic control for the development of high piezoelectric leadfree alkaline niobates and a deep insight for the crystallization of oxide nanostructures during a hydrothermal process.

show abstract

“…39 Both voltage and current generated from this device represent a relative high level in the piezoelectric field reported. For example, the maximum voltage of 67.7 V is over 20 times larger than that of nanocomposite device based on NaNbO 3 nanowires 40 and BaTiO 3 nanoparticles, which both are only 3.2 V. It is also over 9 times larger than that of a ZnO nanoparticle-based nanocomposite and over 5 times larger than that of a device based on KNLN particle and Cu nanorod, 41 the output voltage of which are 7.5 V and 12 V respectively. The maximum current of 18.8 uA is over 7 times larger than that of a ZnO nanoparticles-based device and over 15 times larger than that of a nanogenerator based on KNLN particle and Cu nanorod.…”

mentioning

confidence: 96%

A record flexible piezoelectric KNN ultrafine-grained nanopowder-based nanogenerator

et al. 2015

View full text Add to dashboard Cite

We explore a type piezoelectric material 0.9525(K0.5Na0.5NbO3)-0.0475LiTaO3 (KNN-LTS) which can be used to fabricate nanogenerator with high output voltage and current due to its high piezoelectric constant (d33). Because of its unique structure mixed with multi-wall carbon nanotube and polydimethylsiloxane, the output voltage is up to 53 V and the output current is up to 15 uA (current density of 12.5 uA/cm2) respectively. The value of the output voltage and output current represent the highest level in the piezoelectric field reported to date. The KNN-LTS nanopowder-based nanogenerator can also be used as a sensitive motion detection sensor.

show abstract

Lead-Free NaNbO₃ Nanowires for a High Output Piezoelectric Nanogenerator

Cited by 446 publications

References 30 publications

Nanostructured polymer-based piezoelectric and triboelectric materials and devices for energy harvesting applications

Nanostructured polymer-based piezoelectric and triboelectric materials and devices for energy harvesting applications

In Situ Observation of Dehydration-Induced Phase Transformation from Na₂Nb₂O₆–H₂O to NaNbO₃

A record flexible piezoelectric KNN ultrafine-grained nanopowder-based nanogenerator

Contact Info

Product

Resources

About

Lead-Free NaNbO3 Nanowires for a High Output Piezoelectric Nanogenerator

Cited by 446 publications

References 30 publications

Nanostructured polymer-based piezoelectric and triboelectric materials and devices for energy harvesting applications

Nanostructured polymer-based piezoelectric and triboelectric materials and devices for energy harvesting applications

In Situ Observation of Dehydration-Induced Phase Transformation from Na2Nb2O6–H2O to NaNbO3

A record flexible piezoelectric KNN ultrafine-grained nanopowder-based nanogenerator

Contact Info

Product

Resources

About

Lead-Free NaNbO₃ Nanowires for a High Output Piezoelectric Nanogenerator

In Situ Observation of Dehydration-Induced Phase Transformation from Na₂Nb₂O₆–H₂O to NaNbO₃