Enhanced piezoelectric response in nanoclay induced electrospun PVDF nanofibers for energy harvesting

Tiwari, Shivam; Gaur, Anupama; Kumar, Chandan; Maiti, Pralay

doi:10.1016/j.energy.2019.01.043

Cited by 126 publications

(91 citation statements)

References 39 publications

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“…In addition, the loading of the nanofiller outside a certain limit comes in detrimental fiber morphology and phase formation, as shown from the morphological study of the electrospun nanocomposite, and therefore, the ultimate electroactive phase in the PVDF polymer goes down. [33] It is ostensible that the use of KNN NRs in the nanofibers results in significant improvement in piezoelectric performance, because it is well known that KNN has better piezoelectric properties, such as a higher electromechanical coupling factor, higher dielectric constant, higher Curie temperature, and higher piezoelectric coefficient. As a result, the output signal of electrospun web based nanogenerator has improved drastically even at a loading of 3% KNN.…”

Section: Piezoelectric Performance Of the Pvdf/knn Nrs Electrospun Namentioning

confidence: 99%

Influence of High Aspect Ratio Lead‐Free Piezoelectric Fillers in Designing Flexible Fibrous Nanogenerators: Demonstration of Significant High Output Voltage

Bairagi

Ali

2019

Energy Tech

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Engineering a flexible, cost‐effective piezoelectric energy harvester with a higher piezoelectric performance, i.e., higher voltage and power density, is a great technical challenge nowadays. Herein, the same target is set to demonstrate a unique nanogenerator comprising nanorods (aspect ratio of ≈8.5) of lead‐free potassium sodium niobate (KNN) and poly(vinylidene fluoride) (PVDF) where further poling process is fully omitted. The unique dimension of the synthesized rods with minimal loading (only 3%) bestows, somewhat surprisingly, a negative effect on beta nucleation but subdues this effect by the significant contribution toward the piezoelectric response by self‐orienting the dipoles at the electrospinning process by itself. Thus, the approach resolves the unmet task of complicacy in poling both the molecular and ionic dipoles at the same electric field in a subsequent poling of the finally formed nanocomposite. The nanodevice shows a higher open‐circuit output voltage of ≈17.5 V, an output current of ≈0.522 μA, and a current density of ≈0.13 μA cm−2 under repeated finger tapping and can power a light‐emitting diode (LED) of 2 V practically. The study opens a new route for excellent flexible piezoelectric nanogenerators for promising application in an enormous arena of self‐powering portable and wearable electronic gadgets.

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Section: Piezoelectric Performance Of the Pvdf/knn Nrs Electrospun Namentioning

confidence: 99%

Influence of High Aspect Ratio Lead‐Free Piezoelectric Fillers in Designing Flexible Fibrous Nanogenerators: Demonstration of Significant High Output Voltage

Bairagi

Ali

2019

Energy Tech

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“…Energy harvesting from environmental mechanical sources such as body movements including finger imparting,8 pushing,9 stretching,10 bending,11 twisting,12 air flow,13 transportation movement,14 and sound waves15 has attracted widespread attention to promote flexible self‐powered devices 16. The best common mechanical energy harvesting methods are based on piezoelectric materials 17.…”

Section: Introductionmentioning

confidence: 99%

Wearable Electronic Textiles from Nanostructured Piezoelectric Fibers

Mokhtari

Spinks

Fay

et al. 2020

Adv Materials Technologies

131

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to produce a new generation of smart garments.Such affordable smart garments could fulfil diverse applications, ranging from work wear in specific industries to the almost infinite scenarios of personal use including energy harvesting/storage, force/pressure measurement, porosity or color variation, and sensors (movement, temperature, chemicals). [1][2][3][4][5][6][7] However, performance, scalability, and cost problems have restricted the deployment of currently available smart textiles. To build smart textiles on an industrial scale, method of manufacturing and material selection are two important requirements. The approach of new energy materials and novel fabrication methods are essential to develop wearable technologies. Wearable energy generating devices that can be seamlessly integrated into garments are a critical component of the wearable electronics genre. Currently flexible fiber energy harvesters have attracted significant attention due to their ability to be integrated into fabrics, or stitched into existing textiles. Large-scale production of energy harvester fibers using conventional manufacturing processes, however, is still a challenge.Energy harvesting from environmental mechanical sources such as body movements including finger imparting, [8] pushing, [9] stretching, [10] bending, [11] twisting, [12] air flow, [13] transportation movement, [14] and sound waves [15] has attracted widespread attention to promote flexible self-powered devices. [16] The best common mechanical energy harvesting methods are based on piezoelectric materials. [17] Piezoelectric materials can be classified in three categories: piezoelectric ceramics, piezoelectric polymers, and piezoelectric composites. [18] Unlike the energy harvesters utilizing solar or thermal energy, performance of piezoelectric generators is generally not limited by environmental factors. [19] Piezoelectric generators have received massive interest in energy harvesting technology due to their unique ability to capture the ambient vibrations to generate electric signals. [20] The unique energy transduction of piezoelectric materials enables their applications in fields of energy harvesting, actuators, [21] sensors, [22] structural health monitoring, and use in biomedical devices. [23] Numerous approaches have been used to fabricate piezoelectric generators, such as coating, [24] spinning, [25] depositing, [26] and printing. [27] Wearable energy harvesting is of practical interest for many years and for diverse applications, including development of self-powered wireless sensors within garments for human health monitoring. Herein, a novel approach is reported to create wearable energy generators and sensors using nanostructured hybrid piezoelectric fibers and exploiting the enormous variety of textile architectures. It is found that high performance hybrid piezofiber is obtained using a barium titanate (BT) nanoparticle and poly(vinylidene fluoride) (PVDF) with a mass ratio of 1:10. These fibers are knitted to form a wearable energy generator that pr...

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“…The transient electron flow driven across the electrode pair applied to the material by this potential can supply low-power electronics. Based on this working mechanism, piezoelectric nanogenerators (PENGs) harvest waste mechanical energy from walking, foot-and finger-tapping, talking, breathing, bending, twisting, and other body movements and transform it to useful electric power [251,255]. The working mechanism of triboelectric nanogenerators (TENGs) is different.…”

Section: Nanogenerators For Energy Harvestingmentioning

confidence: 99%

“…A detailed description of their operating modes, device design, and performance enhancement, as well as an accurate illustration of the fundamentals of this technology, can be found elsewhere [252][253][254][256][257][258][259]. Polyvinylidene fluoride (PVDF), a semicrystalline polymer with alternating hydrogen and fluorine units attached to the carbon chain, is one of the most efficient piezoelectric materials [251,255]. It is biocompatible, flexible, chemically resistant, and endowed with high mechanical strength.…”

Section: Nanogenerators For Energy Harvestingmentioning

confidence: 99%

Electrospun Nanomaterials for Energy Applications: Recent Advances

Santangelo

2019

Applied Sciences

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Electrospinning is a simple, versatile, cost-effective, and scalable technique for the growth of highly porous nanofibers. These nanostructures, featured by high aspect ratio, may exhibit a large variety of different sizes, morphologies, composition, and physicochemical properties. By proper post-spinning heat treatment(s), self-standing fibrous mats can also be produced. Large surface area and high porosity make electrospun nanomaterials (both fibers and three-dimensional fiber networks) particularly suitable to numerous energy-related applications. Relevant results and recent advances achieved by their use in rechargeable lithium- and sodium-ion batteries, redox flow batteries, metal-air batteries, supercapacitors, reactors for water desalination via capacitive deionization and for hydrogen production by water splitting, as well as nanogenerators for energy harvesting, and textiles for energy saving will be presented and the future prospects for the large-scale application of electrospun nanomaterials will be discussed.

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Enhanced piezoelectric response in nanoclay induced electrospun PVDF nanofibers for energy harvesting

Cited by 126 publications

References 39 publications

Influence of High Aspect Ratio Lead‐Free Piezoelectric Fillers in Designing Flexible Fibrous Nanogenerators: Demonstration of Significant High Output Voltage

Influence of High Aspect Ratio Lead‐Free Piezoelectric Fillers in Designing Flexible Fibrous Nanogenerators: Demonstration of Significant High Output Voltage

Wearable Electronic Textiles from Nanostructured Piezoelectric Fibers

Electrospun Nanomaterials for Energy Applications: Recent Advances

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