High pyroelectric effect in poly(vinylidene fluoride) composites cooperated with diamond nanoparticles

Li, Wenru; An, Zhu; Lin, Ying-Hsi; Liu, Pin; Shen, Meng; Zhou, Licheng; Liu, Huan; Yuan, Jiale; Qin, Shuang; Zhang, Xu; Yang, Nuo; Jiang, Shenglin; Zhang, Guangzu

doi:10.1016/j.matlet.2020.127514

Cited by 12 publications

(7 citation statements)

References 18 publications

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“…The results given in Figure b–d reveal how the electrical poling leads to better pyroelectric properties than those recently reported in such polymer composite films. The obtained pyroelectric sensitivity, − power density, − and pyroelectric coefficients − are comparable (or better) to most of the recently published reports (Figure d–f). Despite no significantly enhanced magnetic moment (Figure a), both FE (Figure a) and ME (Figure b) properties are improved markedly.…”

Section: Resultssupporting

confidence: 90%

“…(b) The temperature profile, corresponding pyroelectric current, and (c) output voltage from the unpoled (self-poled) and electrically poled 30 FT over thermal fluctuations at a 0.1 Hz frequency. (d) Comparison of pyroelectric sensitivity ( S ), − (e) power density ( P d ), − and (f) pyroelectric coefficients of ferrite-doped P(VDF-TrFE) composite and neat P(VDF-TrFE) films. − …”

Section: Resultsmentioning

confidence: 99%

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A Spin-Charge-Regulated Self-Powered Nanogenerator for Simultaneous Pyro-Magneto-Electric Energy Harvesting

Saini,

Sengupta,

Mondal

et al. 2024

ACS Nano

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In view of the depletion of natural energy resources, harvesting energy from waste is a revolution to simultaneously capture, unite, and recycle various types of waste energies in flexible devices. Thus, in this work, a spin-charge-regulated pyro-magnetoelectric nanogenerator is devised at a well-known ferroelectric P(VDF-TrFE) copolymer. It promptly stores thermal-magnetic energies in a "capacitor" that generates electricity at room temperature. The ferroelectric domains are regulated to slip at the interfaces (also twins) of duly promoting polarization and other properties. An excellent pyroelectric coefficient p ∼ 615 nC•m −2 •K −1 is obtained, with duly enhanced stimuli of a thermal sensitivity ∼1.05 V•K −1 , a magnetoelectric coefficient α me ∼8.8 mV•cm −1 •Oe −1 at 180 Hz (resonance frequency), and a magnetosensitivity ∼473 V/T. It is noteworthy that a strategy of further improving p (up to 41.2 μC•m −2 •K −1 ) and α me (up to 23.6 mV•cm −1 •Oe −1 ) is realized in the electrically poled dipoles. In a model hybrid structure, the spins lead to switch up the electric dipoles parallel at the polymer chains in a cohesive charged layer. It is an innovative approach for efficiently scavenging waste energies from electric vehicles, homes, and industries, where abundant thermal and magnetic energies are accessible. This sustainable strategy could be useful in next-generation self-powered electronics.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

A Spin-Charge-Regulated Self-Powered Nanogenerator for Simultaneous Pyro-Magneto-Electric Energy Harvesting

Saini,

Sengupta,

Mondal

et al. 2024

ACS Nano

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show abstract

“…After fully mixed with curing agent, the PDMS was sent to dope graphene plates to enhance its thermal conductivity, according to the principle of solid thermal conduction [ 17 ]. If it increases the content of electrons or phonons, it hopes to increase the thermal conductivity of a certain material [ 18 ]. On the other hand, the flexible materials in this work are used as packaging for hardware circuits.…”

Section: Methodsmentioning

confidence: 99%

Graphene-Enhanced Polydimethylsiloxane Patch for Wearable Body Temperature Remote Monitoring Application

Huang

2022

Sensors

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In this work, we designed and implemented a wearable body temperature monitoring device, which was constructed by a graphene-enhanced polydimethylsiloxane patch and a temperature measurement chip. The body temperature patch adopts a completely flexible solution in combination with near field communication component, which provides the advantages of passive wireless, overall flexibility, and being comfortable to wear. The whole device can be bent and stretched in conformal contact with skin. In order to improve the temperature conduction ability of the patch and make the patch data more accurate, we adopted graphene nanoplates to improve the thermal conductivity of polydimethylsiloxane patch with a significant thermal conductivity increase of 23.8%. With the combination of hollow sandwich structure and small dimension. it will reduce the uncomfortable situation of wearing the device for extended periods and can be served to monitor the human body temperature for a long time. Ultimately, this device is combined with a reading software for analyzing and processing on a smart mobile terminal. The real-time and past temperature range can be a pre-warning; meanwhile, the historical data can be traced and analyzed. Therefore, this device can be utilized in multiple human body temperature measurement scenarios and complex public health situations.

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“…Adding reinforcing fillers provides an elegant solution to the above challenge. Li et al 18 used synthetic diamonds to promote the conversion of α phase to β phase in PVDF films, resulting in improved pyroelectric properties. When the content of diamond was 0.4 wt%, the pyroelectric coefficient reached a maximum of 87 μC/m 2 K, which was 3.5 times that of pure PVDF.…”

Section: Introductionmentioning

confidence: 99%

High pyroelectric performances of graphene nanoplatelet reinforced polyvinylidene fluoride composite film

et al. 2023

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As a semi‐crystalline polymer with pyroelectric properties, polyvinylidene fluoride (PVDF) has demonstrated great potential in developing smart and multifunctional materials. However, the low level of β phase in pure PVDF restricts its pyroelectric performance and applications. Selecting graphene nanoplatelets (GNP) as the reinforcing filler, this current work pioneeringly investigates the pyroelectric performances of GNP/PVDF composite films subjected to different scenarios. It is found that the addition of GNP can significantly enhance the formation of the β phase in PVDF and the pyroelectric performances of the composite. When the GNP content is 10 wt%, the pyroelectric coefficient of the GNP/PVDF composite film reaches up to 260 μC/m2K, which is about 10 times that of pure PVDF. Parametric study demonstrates that decreasing the thickness of the composite film and increasing the temperature are beneficial to improve the pyroelectric performances. Moreover, the addition of GNPs cannot only enhance the pyroelectric performance, but also improves the thermal stability of the composite film. The work is envisaged to provide guidelines for the design and manufacturing PVDF‐based sensors with improved sensitivity.

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High pyroelectric effect in poly(vinylidene fluoride) composites cooperated with diamond nanoparticles

Cited by 12 publications

References 18 publications

A Spin-Charge-Regulated Self-Powered Nanogenerator for Simultaneous Pyro-Magneto-Electric Energy Harvesting

A Spin-Charge-Regulated Self-Powered Nanogenerator for Simultaneous Pyro-Magneto-Electric Energy Harvesting

Graphene-Enhanced Polydimethylsiloxane Patch for Wearable Body Temperature Remote Monitoring Application

High pyroelectric performances of graphene nanoplatelet reinforced polyvinylidene fluoride composite film

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