Pyroelectric Energy Harvesting: Materials and Applications

Bowen, Chris; Xie, Mengying; Zhang, Yan; Topolov, V. Yu.; Wan, Chaoying

doi:10.1002/9783527807505.ch7

Cited by 5 publications

(5 citation statements)

References 102 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…M olecular materials based on dynamic electron processes are expected to provide better chemical tailorability, faster switching rates and light switchability [1][2][3][4] . The study of molecular compounds with superior physical properties attracts increasing attention because of their fundamental importance and potential applications in pyroelectric sensors [5][6][7] , digital memory [8][9][10][11] and energy conversion devices [12][13][14] . One of the key properties is polarization [15][16][17] .…”

mentioning

confidence: 99%

Manipulating electron redistribution to achieve electronic pyroelectricity in molecular [FeCo] crystals

Sadhukhan

Long

et al. 2021

Nat Commun

View full text Add to dashboard Cite

Pyroelectricity plays a crucial role in modern sensors and energy conversion devices. However, obtaining materials with large and nearly constant pyroelectric coefficients over a wide temperature range for practical uses remains a formidable challenge. Attempting to discover a solution to this obstacle, we combined molecular design of labile electronic structure with the crystal engineering of the molecular orientation in lattice. This combination results in electronic pyroelectricity of purely molecular origin. Here, we report a polar crystal of an [FeCo] dinuclear complex exhibiting a peculiar pyroelectric behavior (a substantial sharp pyroelectric current peak and an unusual continuous pyroelectric current at higher temperatures) which is caused by a combination of Fe spin crossover (SCO) and electron transfer between the high-spin Fe ion and redox-active ligand, namely valence tautomerism (VT). As a result, temperature dependence of the pyroelectric behavior reported here is opposite from conventional ferroelectrics and originates from a transition between three distinct electronic structures. The obtained pyroelectric coefficient is comparable to that of polyvinylidene difluoride at room temperature.

show abstract

mentioning

confidence: 99%

Manipulating electron redistribution to achieve electronic pyroelectricity in molecular [FeCo] crystals

Sadhukhan

Long

et al. 2021

Nat Commun

View full text Add to dashboard Cite

show abstract

“…The corona pre-treatment was performed on the PET-ITO substrate to increase its surface energy using a LabTEC Lab System (Tantec, Lunderskov, Denmark) equipped with a high frequency generator (range of [25][26][27][28][29][30][31][32][33][34][35]. Contact angle measurements were carried out using the OCA-20 system in sessile drop configuration using single drops of water and diiodomethane of 0.5 µL.…”

Section: Methodsmentioning

confidence: 99%

“…The presence of spontaneous polarization in such materials implies the existence of a charge on their surfaces which can attract free charges [2,19,24]. Since the level of polarization varies as the temperature changes in the pyroelectrics, surface-bound charges become free (heating) or attracted (cooling) as a result of the temperature-dependent surface-charge density [26][27][28][29]. Therefore, if the pyroelectric is orthogonally sandwiched to its polar axis by two electrodes, under short circuit conditions, a generation of current i p can occur when the material undergoes temperature variation over time, as expressed by the following equation:…”

Section: Introductionmentioning

confidence: 99%

“…is the pyroelectric coefficient of the unclamped material defined as the change of its spontaneous polarization P s with temperature when in constant stress σ and electric field E conditions, A is the surface area covered by the electrodes and dT dt is the rate of temperature change [9,23,26,27]. Equation (1) states that i p is independent of the material layer thickness and only scales with its active area as the current is only related to the surface charge [19].…”

Section: Introductionmentioning

confidence: 99%

“…Due to their high pyroelectric coefficient, single crystal materials are considered promising in pyroelectric applications. However, their high cost, expensive processing techniques and poor size scalability strongly restrict their adoption [27,29].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gravure Printing for PVDF Thin-Film Pyroelectric Device Manufacture

et al. 2022

View full text Add to dashboard Cite

Pyroelectric energy harvesting is one of the more recent and promising solid-state approaches for directly converting time-dependent temperature fluctuations into electric energy. Conventional printing technologies can offer many advantages for the production of pyroelectric thin-film-based devices, such as low cost, low temperature, the use of flexible substrates and shaping at the same time as deposition. Nevertheless, some issues related to low printed thickness and film-forming microstructure control need to be addressed. In this exploratory study, the possibility of exploiting the highly attractive gravure printing process for the potential industrial manufacture of flexible polyvinylidene fluoride (PVDF) thin-film pyroelectric devices was investigated. By the use of corona pre-treatment of the printing substrate and low-temperature polar solvent evaporation, multilayer gravure-printed PVDF pyroelectric devices were successfully manufactured for the first time, achieving a maximum generated current of 0.1 nA at 2.5 K/s from a device with an active area of 1 cm2. Considering the very low thermal inertia and performance scaling by the area expected for pyroelectric thin-film-based devices, combined with the upscaling potential of roll-to-roll gravure printing, our results provide new opportunities for on-demand, low-cost pyroelectric device manufacture and their integration in hybrid harvesters.

show abstract

Waterproof, Breathable, and Antibacterial Self‐Powered e‐Textiles Based on Omniphobic Triboelectric Nanogenerators

Medeiros

Chanci

Moreno

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

Multifunctional electronic textiles (e-textiles) incorporating miniaturized electronic devices will pave the way toward a new generation of wearable devices and human-machine interfaces. Unfortunately, the development of e-textiles is subject to critical challenges, such as battery dependence, breathability, satisfactory washability, and compatibility with mass production techniques. This work describes a simple and cost-effective method to transform conventional garments and textiles into waterproof, breathable, and antibacterial e-textiles for self-powered human-machine interfacing. Combining embroidery with the spray-based deposition of fluoroalkylated organosilanes and highly networked nanoflakes, omniphobic triboelectric nanogenerators (R F -TENGs) can be incorporated into any fiber-based textile to power wearable devices using energy harvested from human motion. R F -TENGs are thin, flexible, breathable (air permeability 90.5 mm s −1 ), inexpensive to fabricate (<0.04$ cm −2 ), and capable of producing a high power density (600 µW cm −2 ). E-textiles based on R F -TENGs repel water, stains, and bacterial growth, and show excellent stability under mechanical deformations and remarkable washing durability under standard machine-washing tests. Moreover, e-textiles based on R F -TENGs are compatible with large-scale production processes and exhibit high sensitivity to touch, enabling the cost-effective manufacturing of wearable human-machine interfaces.

show abstract

Pyroelectric Energy Harvesting: Materials and Applications

Cited by 5 publications

References 102 publications

Manipulating electron redistribution to achieve electronic pyroelectricity in molecular [FeCo] crystals

Manipulating electron redistribution to achieve electronic pyroelectricity in molecular [FeCo] crystals

Gravure Printing for PVDF Thin-Film Pyroelectric Device Manufacture

Waterproof, Breathable, and Antibacterial Self‐Powered e‐Textiles Based on Omniphobic Triboelectric Nanogenerators

Contact Info

Product

Resources

About