Pyroelectric Nanogenerators for Driving Wireless Sensors

Yang, Ya; Wang, Sihong; Zhang, Yan; Wang, Zhong Lin

doi:10.1021/nl303755m

Cited by 249 publications

(183 citation statements)

References 20 publications

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“…There are various renewable energy sources other than solar and wind energies; like the piezoelectric,80, 81, 82, 83, 84, 85 pyroelectric,83, 86, 87, 88 and electromagnetic effects 89, 90, 91. The triboelectric process is one such kind associated with our daily activities that involves the relative motion between two surfaces that can generate considerable energy that is currently wasted.…”

Section: Fiber‐shaped Energy Harvesting Devicesmentioning

confidence: 99%

Fiber‐Type Solar Cells, Nanogenerators, Batteries, and Supercapacitors for Wearable Applications

et al. 2018

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Wearable electronic devices represent a paradigm change in consumer electronics, on‐body sensing, artificial skins, and wearable communication and entertainment. Because all these electronic devices require energy to operate, wearable energy systems are an integral part of wearable devices. Essentially, the electrodes and other components present in these energy devices should be mechanically strong, flexible, lightweight, and comfortable to the user. Presented here is a critical review of those materials and devices developed for energy conversion and storage applications with an objective to be used in wearable devices. The focus is mainly on the advances made in the field of solar cells, triboelectric generators, Li‐ion batteries, and supercapacitors for wearable device development. As these devices need to be attached/integrated with the fabric, the discussion is limited to devices made in the form of ribbons, filaments, and fibers. Some of the important challenges and future directions to be pursued are also highlighted.

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Section: Fiber‐shaped Energy Harvesting Devicesmentioning

confidence: 99%

Fiber‐Type Solar Cells, Nanogenerators, Batteries, and Supercapacitors for Wearable Applications

et al. 2018

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“…60×C higher. Thus, a negative volatge drop is observed across the pyroelectric materials [11], negative volage drop signifies that charges are flowing from the earh( taken as reference) to the pyroelctric [12]. Pyroelectricity relates a change in temperature to a change in electrical displacement D (C/m 2 ) dD= pdT-(1) (Where p is pyroelectric coefficeint (C/m 2 K), dT represents change in temperature).…”

Section: Voltage Generation Using -Pyroelectricsmentioning

confidence: 99%

Transforming Energy Making Use of Pyroelectric: A Conservation Technique

Dewan¹,

Arya²

2015

JOCET

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Abstract-A lot of energy around us gets wasted, keeping in mind, the increasing energy demand and scarcity of resources, we have devised an idea to conserve the heat energy, which gets emitted out by the refrigerator. The technique works as follows : a pyrolectric transducer is attached to the compressor pump of the refrigerator, aligned in such a way that one side of it is line other contact with the compressor and other with the wall( ceiling ) or the other part is at room temperature. This temperature of the compressor is approx. 50-75 celsius higher than the room temperature. This creates a temperature difference between the two sided of the transducer which in turn modifies the orientation of the atoms, leading to the change in polarization and thus giving rise to a constant voltage across the transducer(pyroelectric).This transducer is further connected to a capacitor. Due to this voltage across the transducer, the capacitor gets charged up and this can be further used as a supply to any appliance (operating at low voltage).

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“…The typical behavior is similar to (D), see also Refs. [15][16][17]. (C) Distinctly, the-third-way produces electric current from the time-dependent temperature fluctuation in contrast to Seebeck effect, and it does not require polar materials but applies to general conducting system in contrast to pyroelectric effect.…”

Section: Seebeck Effect Pyroelectric Effectmentioning

confidence: 99%

“…Periodic temperature fluctuation is imposed on the whole system, following Refs. [15][16][17]. Without loss of generality, we adopt the square-wave fluctuation that is convenient for theoretical analysis and can be decomposed as linear superpositions of sine functions [30].…”

Section: Seebeck Effect Pyroelectric Effectmentioning

confidence: 99%

“…This is due to the fact that the temporal temperature fluctuation modifies the spontaneous polarization of polar crystals, which consequently redistributes surface charges and produces temporary electric current [11,12]. In addition to thermal-electric energy harvesting [13][14][15][16][17], pyroelectric effect has widespread applications in long-wavelength infrared sensing, motion detector, thermal image [11], and even nanoscale printing [18].However, since Seebeck and pyroelectric effects have been known for quite a long time, one cannot help wondering: Does Nature only offer us these two means for thermal-electric energy harvesting? Does any new principle of thermal-electric conversion exist beyond them?…”

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confidence: 99%

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The Third Way of Thermal-Electric Conversion beyond Seebeck and Pyroelectric Effects

Ren

2014

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Thermal-electric conversion is crucial for smart energy control and harvesting, such as thermal sensing and waste heat recovering. So far, people are aware of only two ways of direct thermal-electric conversion, Seebeck and pyroelectric effects, each with distinct working conditions and limitations. Here, we report the third way of thermal-electric conversion beyond Seebeck and pyroelectric effects. In contrast to Seebeck effect that requires spatial temperature difference, the-third-way converts the time-dependent ambient temperature fluctuation into electricity, similar to the behavior of pyroelectricity. However, the-third-way is also distinct from pyroelectric effect in the sense that it does not require polar materials but applies to general conducting systems. We demonstrate that the-third-way results from the temperature-fluctuation-induced dynamical charge redistribution. It is a consequence of the fundamental nonequilibrium thermodynamics and has a deep connection to the topological phase in quantum mechanics. The findings expand our knowledge and provide new means of thermal-electric energy harvesting.About 90 percent of the world's energy is utilized through heating and cooling, which makes energy waste a great bottleneck to the sustainability of any modern economy [1]. In addition to developing new technology of smart heat control [2], the global energy crisis can be alleviated by recovering the wasted thermal energy. In view of the inconvenient truth that more than 60% of the energy utilization was lost mostly as wasted heat [3], harvesting the thermal energy becomes critical to provide a cleaner and sustainable future [1].Thermal-electric energy harvesting mainly relies on two principles: Seebeck effect (Fig. 1A) and pyroelectric effect (Fig. 1B). The Seebeck effect utilizes the spatial temperature difference between two sides of materials to drive the diffusion of charge carriers so as to convert heat into electricity [4,5]. Besides recovering waste heat, Seebeck effect with its reciprocal has wide applications of cooling, heating, power generating [6] and thus has revitalized an upsurge of research interest recently [7,8]. However, when the ambient temperature is spatially uniform, we have to resort to the pyroelectric effect [9], which utilizes the time-dependent temperature variation to convert heat into electricity but is restricted to pyroelectric materials [10]. This is due to the fact that the temporal temperature fluctuation modifies the spontaneous polarization of polar crystals, which consequently redistributes surface charges and produces temporary electric current [11,12]. In addition to thermal-electric energy harvesting [13][14][15][16][17], pyroelectric effect has widespread applications in long-wavelength infrared sensing, motion detector, thermal image [11], and even nanoscale printing [18].However, since Seebeck and pyroelectric effects have been known for quite a long time, one cannot help wondering: Does Nature only offer us these two means for thermal-electric energy harvestin...

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Pyroelectric Nanogenerators for Driving Wireless Sensors

Cited by 249 publications

References 20 publications

Fiber‐Type Solar Cells, Nanogenerators, Batteries, and Supercapacitors for Wearable Applications

Fiber‐Type Solar Cells, Nanogenerators, Batteries, and Supercapacitors for Wearable Applications

Transforming Energy Making Use of Pyroelectric: A Conservation Technique

The Third Way of Thermal-Electric Conversion beyond Seebeck and Pyroelectric Effects

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