Piezoelectric Nanogenerators based on Graphene Oxide/PVDF Electrospun Nanofiber with Enhanced Performances by In-Situ Reduction

Yang, Jie; Zhang, Yihe; Li, Yanan; Wang, Wenwen; Wang, Wenjiang; An, Qi; Tong, Wangshu

doi:10.1016/j.mtcomm.2020.101629

Cited by 66 publications

(49 citation statements)

References 43 publications

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“…They explained that the interface bonding between GO and PVDF and the formation of the β-phase are responsible for the enhanced output performance. In the same direction, Yang et al 77 prepared PVDF/GO, and PVDF/reduced GO (rGO) composite NFs via electrospinning and studied their effects on the piezoelectric response. They determined the maximum amount of the β-phase by incorporating 2 wt % of GO and rGO in PVDF matrix.…”

Section: Application Of Pvdf-based Piezoelectric Materials In Energy ...mentioning

confidence: 99%

Nanoparticle-Enhanced β-Phase Formation in Electroactive PVDF Composites: A Review of Systems for Applications in Energy Harvesting, EMI Shielding, and Membrane Technology

Gebrekrstos

Muzata

Ray

2022

ACS Appl. Nano Mater.

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With the continuous advancement of electronic devices, lightweight, flexible, and easily processable materials have gained substantial techno-commercial importance. Most electronic devices must possess a lightweight, high conductivity, high dielectric permittivity, low dielectric loss, and high breakdown strength. Hence, polymer-based piezoelectric materials are in great demand for design and development in energy storage, electromagnetic interference (EMI) shielding, and ultrafiltration applications. Among the piezoelectric polymers, poly(vinylidene fluoride) (PVDF) with a predominantly polar β-phase is the most important. However, the main drawbacks of the PVDF matrix are its relatively low electrical conductivity and dielectric permittivity, and poor energy harvesting and EMI shielding performance. In this context, the incorporation of conductive nanofillers such as reduced graphene oxides, graphene quantum dots, and carbon nanotubes in the PVDF matrix has attracted considerable interest owing to their extraordinary properties. The final properties of these piezoelectric composites depend on the preparation methods, structural conformation, processing conditions, dispersion of nanofillers in the matrix, surface modification of fillers, and specific or nonspecific interaction of the fillers with the PVDF matrix. Herein, we have critically reviewed the formation mechanism of the electroactive β-phase in PVDF, the effects of nanofillers on the phase transformation of PVDF (dispersion and specific interaction), and the correlation of β-phase PVDF piezoelectric and dielectric properties with energy harvesting, EMI shielding, and membrane applications.

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Section: Application Of Pvdf-based Piezoelectric Materials In Energy ...mentioning

confidence: 99%

Nanoparticle-Enhanced β-Phase Formation in Electroactive PVDF Composites: A Review of Systems for Applications in Energy Harvesting, EMI Shielding, and Membrane Technology

Gebrekrstos

Muzata

Ray

2022

ACS Appl. Nano Mater.

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“…Because treating the films with acetone or methanol and the inclusion of graphene increases conductivity, graphene with acetone solution increases the conductivity of the fiber mat. The short-circuit current achieved is 14 mA pk-to-pk compared to 700 nA of the 2% rGO/PVDF sample observed by Yang et al…”

Section: Resultsmentioning

confidence: 65%

“…The piezoelectric performance of a nanogenerator under various external mechanical stresses, such as pressure, tapping, and impact, was demonstrated by an electrospun PAni (polyaniline)/HNT (halloysite nanotube)/PVDF blend nanocomposite, although a low current of as few μA was obtained. A highly flexible electrospun PVDF/PAni/g-C 3 N 4 blend nanocomposite (PPBF) nanogenerator (size of ∼5.5 cm 2 ) for piezoelectric energy harvesting with maximum voltage and current output of 30 V and 3.7 μA, respectively, was successfully developed by Khalifa et al Yang et al showed that graphene oxide integration (up to 2%) in PVDF increased the β-phases of PVDF, and the short-circuit current and open-circuit voltage values were 200 nA and 1.5 V, respectively …”

Section: Introductionmentioning

confidence: 99%

Graphene-Coated PVDF/PAni Fiber Mats and Their Applications in Sensing and Nanogeneration

Rahman

Rubaiya

Islam

et al. 2022

ACS Appl. Mater. Interfaces

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Forcespinning is a powerful technique to produce fiber systems with suitable properties for a vast array of applications. This study investigates the sensing and energy generation performance of PVDF/PAni fiber mat systems made by the forcespinning method with and without graphene coating. The developed fiber mats were coated with graphene nanoflakes by drop-casting. The graphene-coated nanocomposites show an average output voltage of 75 mV (peak-to-peak), which is 300% higher compared to bare fiber mats, and an output current of 24 mA (peak-to-peak) by gentle finger pressing. Moreover, graphene-coated PVDF/PAni showed a volume conductivity of 1.2 × 10–7 S/cm and was investigated as a promising system for temperature (5 times better sensitivity than normal fiber mat), vibration (2 times better voltage generation), and airflow sensing. The graphene-coated composite has been further investigated as a water tide energy harvesting piezoelectric nanogenerator, with the system generating ∼40 mV for a synthetic ocean wave with a flow rate of 30 mL/min. In the future, graphene-coated nanofiber mats can be a solution for low-powered sensors and to harvest blue energy and vibration energy.

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“…To verify the advantages of head-to-head parallel assembly further, we chose electrospun PVDF-TrFE fiber films to prepare a multilayer generator to improve the charge collection from the piezoelectric fiber films. The preparation process ,, and material parameters of the PVDF-TrFE fiber films are shown in the “Preparation of PVDF-TrFE Fiber” section in the Supporting Information and Figure S7. Six PVDF-TrFE fiber films were used to test the output performances under three connection modes, as shown in Figure a (the preparation details are shown in Section ).…”

Section: Resultsmentioning

confidence: 99%

“…They all have piezoelectric multilayer structures similar to, for example, the PVDF fiber films in Yousry’s work. However, their superior generation performances were mainly attributed to the high piezo-response of electrospun fibers, and the contribution of the triboelectricity was overlooked. ,− Meanwhile, for these electrospun piezoelectric fiber films, the friction surface between the fibers was usually large. Therefore, the triboelectric generation of the electrospun piezoelectric fiber films should be considered, and a highly effective hybrid nanogenerator needs to be designed by achieving the synergy of triboelectricity and piezoelectricity to obtain the maximum output …”

Section: Introductionmentioning

confidence: 99%

Effective Mechanical Energy Harvesting from PVDF Multilayers by Head-to-Head Parallel Assembly

Wang

Tong

Chen

et al. 2021

ACS Appl. Energy Mater.

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Piezoelectric multilayers can achieve both piezoelectric and triboelectric generation simultaneously by the deformation and contacting–separating process between upper and lower surfaces of adjacent layers. The electrospun poly(vinylidene fluoride) (PVDF) fiber film as a type of piezoelectric multilayer with abundant inner surfaces can generate both large piezoelectric and triboelectric signals. However, in most studies on the piezoelectric fiber films, the high-generation performances are attributed to the piezoelectric properties and their triboelectric contribution is usually ignored. Thus, the contributions of triboelectricity in piezoelectric multilayers should be considered, and a highly effective hybrid nanogenerator needs to be designed by achieving the synergy of triboelectricity and piezoelectricity. Herein, a head-to-head parallel assembly was used in a PVDF multilayer generator to improve the electricity output, and the respective contributions and synergistic effect of triboelectricity and piezoelectricity in multilayer generators were studied. The maximum open-circuit voltage, short-circuit current, and charge values of the designed hybrid nanogenerator device were 150 V, 7 μA, and 100 nC, respectively. Then, the head-to-head parallel assembly method was used for electrospun poly(vinylidene fluoride-co-trifluoroethylene) fiber films, and the output performance was shown to be about 4 times that obtained by the normal series connection. This head-to-head parallel assembly can be used as a common harvesting method to collect piezoelectric and triboelectric energy effectively from piezoelectric multilayers.

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Piezoelectric Nanogenerators based on Graphene Oxide/PVDF Electrospun Nanofiber with Enhanced Performances by In-Situ Reduction

Cited by 66 publications

References 43 publications

Nanoparticle-Enhanced β-Phase Formation in Electroactive PVDF Composites: A Review of Systems for Applications in Energy Harvesting, EMI Shielding, and Membrane Technology

Nanoparticle-Enhanced β-Phase Formation in Electroactive PVDF Composites: A Review of Systems for Applications in Energy Harvesting, EMI Shielding, and Membrane Technology

Graphene-Coated PVDF/PAni Fiber Mats and Their Applications in Sensing and Nanogeneration

Effective Mechanical Energy Harvesting from PVDF Multilayers by Head-to-Head Parallel Assembly

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