Recent Advancements in Nanogenerators for Energy Harvesting

Hu, Fei; Cai, Qian; Liao, Fan; Shao, Mingwang; Lee, Shuit‐Tong

doi:10.1002/smll.201501011

Cited by 79 publications

(45 citation statements)

References 108 publications

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“…Therefore, these organic ferroelectric materials allow novel possibilities in the areas of memories, capacitors, piezo‐ and pyroelectric sensors, and actuators . The main disadvantage of the use of piezoelectric polymers is that piezoelectric coefficients ( d 33 < 35 pC N −1 ) are lower than those for other piezoelectric materials, as well as the limited thermal stability at higher temperatures [9a,22]. From an electronic approach, ferroelectric polymers are polar and possess a nonconjugated backbone, of lower electrical conductivity…”

Section: Ferroelectric Polymersmentioning

confidence: 99%

Recent Progress on Piezoelectric, Pyroelectric, and Magnetoelectric Polymer‐Based Energy‐Harvesting Devices

et al. 2019

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Energy harvesting from the environment based on electroactive polymers has been increasing in recent years. Ferroelectric polymers are used as mechanical‐to‐electrical energy transducers in a wide range of applications, scavenging the surrounding energy to power low‐power devices. These energy‐harvesting systems operate by taking advantage of the piezoelectric, pyroelectric, and magnetoelectric properties of the polymers, harvesting wasted environmental energy and converting it mainly into electrical energy. There have been developed different nano‐ and micro‐scale power harvesters with an increasing interest for powering mobile electronics and low‐power devices, including applications in remote access areas. Novel electronic devices are developed based on low‐power solutions, and therefore, polymer‐based materials represent a suitable solution to power these devices. Among the different polymers, the most widely used in the device application is the poly(vinylidene fluoride) (PVDF) family, due to its higher output performance.

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Section: Ferroelectric Polymersmentioning

confidence: 99%

Recent Progress on Piezoelectric, Pyroelectric, and Magnetoelectric Polymer‐Based Energy‐Harvesting Devices

et al. 2019

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“…A recent boom in portable energy‐harvesting technologies has generated great interest owing to the broad range of applications that these devices may have in our daily life. Piezoelectric materials allow harvesting of low‐frequency mechanical energy, which exists widely in the ambient environment.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Piezoelectric Performance of Electrospun Polyvinylidene Fluoride Doped with Inorganic Salts

Mao

Yu³

et al. 2017

Macro Materials & Eng

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A novel approach to preparing electrospun polyvinylidene fluoride (PVDF) nanofibers is proposed, with high piezoelectric performance. PVDF nanofibers are doped with inorganic salts without the use of any postpolarization treatment. Twenty‐six salts are doped into the nanofibers and their piezoelectric properties are studied. The salts are classified into three groups based on their differing piezoelectric enhancement effects. A piezoelectric nanogenerator fabricated with an optimized electrospun PVDF nanofiber mat shows a piezovoltage seven times greater than that of a device based on undoped nanofibers. The simple and low‐cost approach to fabricate these piezoelectric nanofiber mats may broaden the range of industrial applications of these materials in energy‐harvesting devices and portable sensors.

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“…[1][2][3][4] Lead zirconate titanate (Pb(Zr,Ti)O 3 ; PZT) is still one of the most important piezoelectric materials because of its superior piezoelectric properties compared to those of other Pb-free candidate materials. [1][2][3][4] Lead zirconate titanate (Pb(Zr,Ti)O 3 ; PZT) is still one of the most important piezoelectric materials because of its superior piezoelectric properties compared to those of other Pb-free candidate materials.…”

Section: Introductionmentioning

confidence: 99%

Large Local‐Compressive Stress‐Induced Improvements in Piezoelectric Characteristics of Lead Zirconate Titanate Thin Films on a Ni Nanodots Array

Han

Cho

Kim

et al. 2018

Adv Elect Materials

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Interfacial stress present in ferroelectric thin films is known to affect largely their piezoelectric properties by modifying crystal orientation and domain structure. Here, a nonconventional way is proposed to substantially improve the polarization and piezoelectric characteristics of Pb(Zr,Ti)O3 thin films by modifying the surface of the typical Si substrate into an embossed structure with Ni nanodots. Uniform Ni nanodot arrays are successfully produced by an external magnetic field through the consolidation process of thin Ni layer. The exceptionally large thermal expansion mismatch of ≈94% between the thin films and the Ni nanodots is believed to induce a large local‐compressive stress around the nanodot region and thus the intensified orientation toward c‐axis. For this demonstration, the in situ sputtering processing enabled by combining heavily 12 mol% Nb‐doping with a bottom electrode structure of Ir/TiW is used. As a highlight of the improvement, a significant increase of ≈33% in effective piezoelectric coefficient is observed for the 90 nm Ni nanodot case. An apparent shift of the polarization–electric field curve suggests the existence of internal field, as an evidence of the in situ domain formation.

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Recent Advancements in Nanogenerators for Energy Harvesting

Cited by 79 publications

References 108 publications

Recent Progress on Piezoelectric, Pyroelectric, and Magnetoelectric Polymer‐Based Energy‐Harvesting Devices

Recent Progress on Piezoelectric, Pyroelectric, and Magnetoelectric Polymer‐Based Energy‐Harvesting Devices

Enhanced Piezoelectric Performance of Electrospun Polyvinylidene Fluoride Doped with Inorganic Salts

Large Local‐Compressive Stress‐Induced Improvements in Piezoelectric Characteristics of Lead Zirconate Titanate Thin Films on a Ni Nanodots Array

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