Synergistic contribution of flexoelectricity and piezoelectricity towards a stretchable robust nanogenerator for wearable electronics

Yoon, Chongsei; Ippili, Swathi; Jella, Venkatraju; Thomas, Alphi Maria; Jung, Jang-Su; Han, Yire; Yang, Tae‐Youl; Yoon, Seok-Jun; Yoon, Giwan

doi:10.1016/j.nanoen.2021.106691

Cited by 43 publications

(28 citation statements)

References 55 publications

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“…Recently, among the various energy-harvesting systems, piezoelectric nanogenerators (PENGs) have a high potential to cater to the energy needs of intelligent electronic devices. 2 The PENG possesses a simple structure and generates electricity by mechanical deformation. Additionally, they can hold a charge for a more extended period than triboelectric nanogenerators (TENGs).…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Polyurethane in Polyurethane–Poly(vinylidene fluoride) Nanofiber-Based Stretchable Piezoelectric Nanogenerators (S-PENGs)

Kaur

Meena

Jassal

et al. 2022

ACS Appl. Polym. Mater.

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Poly(vinylidene fluoride) (PVDF)-based piezoelectric nanogenerators, though flexible, exhibit poor stretchability and mechanical stability. This limits their application for harvesting energy from repeated deformations arising from human articular motions. Herein, we propose a simple and cost-effective approach to overcome the above issues while simultaneously enhancing the piezoelectric effect of PVDF by mixing a small amount of polyurethane (PU) in PVDF–PU nanofibers. The presence of PU in PVDF could enhance electroactive phases by up to 46%, as measured by Fourier transform infrared (FTIR) spectroscopy. Interestingly, an addition of 21% of PU in PVDF exhibited both an increase in the d 33 value from 3.02 to 7.064 pm/V and stretchability to 90%. For developing a stretchable piezoelectric nanogenerator (S-PENG) device, stretchable electrodes with a 4.5 gauge factor at 100% strain were fabricated by spin-coating of poly(3,4-ethylenedioxythiophene) poly(styrene sulfonate) (PEDOT:PSS):graphene nanoplates on a prestrained PU substrate. S-PENG produced 3.8 V, 0.65 μA, and 0.48 μW/cm2 peak open-circuit voltage, short-circuit current, and power density during cyclic deformation, respectively, with electrical and mechanical stability for at least 2000 cycles. Its performance was demonstrated for various human articular motions related to the knee, elbow, and foot by integrating it with wearables. The generated energy from the S-PENG could readily charge capacitors up to ∼650 mV in just 100 s. The designed S-PENGs showed great potential in harvesting energy from simple human motions.

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Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Polyurethane in Polyurethane–Poly(vinylidene fluoride) Nanofiber-Based Stretchable Piezoelectric Nanogenerators (S-PENGs)

Kaur

Meena

Jassal

et al. 2022

ACS Appl. Polym. Mater.

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“…hybrid generators which rely on a joint mixture of different energy harvesters provide a more effective way to improve energy utilization efficiency. [607][608][609][610][611] Moreover, a sensor with a hybrid mechanism can also offer complementary and improved performance. [612][613][614] For example, when piezoelectric sensing is coupled with piezoresistive sensing, a wider detection range can be obtained.…”

Section: Summary and Perspectivesmentioning

confidence: 99%

Piezoelectric nanogenerators for personalized healthcare

et al. 2022

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“…The piezoelectric nanogenerator (PENG) first proposed by Wang is a novel and smart power source with a simple structure, 7 which can effectively convert the neglected and irregular mechanical energy widely existing in the environment into electrical energy by virtue of the piezoelectric effect of nano-piezoelectric materials. 8−11 In particular, the PENG with its excellent flexibility has attracted widespread attention for its potential applications in some fields, such as wearable electronics devices, 12,13 implantable biomedical devices, 14 and self-powered devices. 15,16 When it comes to nano-piezoelectric materials, they can be classified as the polymer and ceramic piezoelectric materials.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric Nanogenerators Based on Electrospun PVDF-Coated Mats Composed of Multilayer Polymer-Coated BaTiO₃ Nanowires

Zhao

Chen

Cheng

et al. 2022

ACS Appl. Nano Mater.

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With the surge in demand for green energy, nanocomposites composed of piezoelectric polymers and nano-piezoelectric ceramics show great prospects in preparing excellent performance piezoelectric nanogenerators (PENGs). However, the agglomeration of the piezoelectric enhancement phase and the low degree of polarization significantly impair the piezoelectric properties of the nanofibers; thus, the output performance of PENGs is severely limited. In this work, barium titanate nanowires piezoelectric ceramics were synthesized by the hydrothermal method. By surface-initiated polymerization, the hyperbranched barium titanate nanowire was surface-grafted with poly(methyl methacrylate) (PMMA). The high dielectric constant and low dielectric loss of hyperbranched polymers lead to higher β-phase content in electrospun nanofilms and suppress current leakage. The PMMA coating results in the uniform dispersion of BaTiO3 nanowires in poly(vinylidene fluoride) (PVDF), thereby enhancing the piezoelectric performance of the fiber nanocomposite PENG. The open circuit voltage and short circuit current of the PENG composed of PVDF and core-double shell PMMA-coated hyperbranched BaTiO3 (BTO@HBP@PMMA) nanowires can reach 3.4 V and 0.32 μA, and the peak output power is 5.25 μW, which is significantly improved compared to that of the unmodified PENG. Furthermore, the flexible PENG has high durability and can continuously generate stable piezoelectric signals for 6000 cycles without decay. The prepared PENG can also efficiently harvest the energy generated by human daily activities. In general, this study provides a new microstructure design for the fabrication of high performance PENGs.

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Synergistic contribution of flexoelectricity and piezoelectricity towards a stretchable robust nanogenerator for wearable electronics

Cited by 43 publications

References 55 publications

Synergistic Effect of Polyurethane in Polyurethane–Poly(vinylidene fluoride) Nanofiber-Based Stretchable Piezoelectric Nanogenerators (S-PENGs)

Synergistic Effect of Polyurethane in Polyurethane–Poly(vinylidene fluoride) Nanofiber-Based Stretchable Piezoelectric Nanogenerators (S-PENGs)

Piezoelectric nanogenerators for personalized healthcare

Piezoelectric Nanogenerators Based on Electrospun PVDF-Coated Mats Composed of Multilayer Polymer-Coated BaTiO₃ Nanowires

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Synergistic contribution of flexoelectricity and piezoelectricity towards a stretchable robust nanogenerator for wearable electronics

Cited by 43 publications

References 55 publications

Synergistic Effect of Polyurethane in Polyurethane–Poly(vinylidene fluoride) Nanofiber-Based Stretchable Piezoelectric Nanogenerators (S-PENGs)

Synergistic Effect of Polyurethane in Polyurethane–Poly(vinylidene fluoride) Nanofiber-Based Stretchable Piezoelectric Nanogenerators (S-PENGs)

Piezoelectric nanogenerators for personalized healthcare

Piezoelectric Nanogenerators Based on Electrospun PVDF-Coated Mats Composed of Multilayer Polymer-Coated BaTiO3 Nanowires

Contact Info

Product

Resources

About

Piezoelectric Nanogenerators Based on Electrospun PVDF-Coated Mats Composed of Multilayer Polymer-Coated BaTiO₃ Nanowires