Investigation of mechanical energy harvesting cycles using ferroelectric/ferroelastic switching

Kang, Wenbin; Chang, Lulu; Huber, J. E.

doi:10.1016/j.nanoen.2021.106862

Cited by 11 publications

(8 citation statements)

References 69 publications

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“…The detailed working mechanism and energy harvesting concept based on ferroelectric/ferroelastic switching can be found in prior publications [59][60][61]; here a brief summary is given to provide context. The general arrangement of the energy harvester comprises a thin layer of a ferroelectric material sandwiched between electrodes and adhered to a substrate, see figures 1(a) and (b).…”

Section: Device Preparation and Experimental Set-upmentioning

confidence: 99%

“…Several theoretical designs have been proposed [50][51][52][53][54][55][56][57][58], but not proven experimentally. Recently, Kang et al [59][60][61] presented an energy harvester in a partially polarized state that overcomes some of the problems. Careful control of the degree of partial poling (called 'pre-poling' in this work) results in an energy harvester that undergoes strong non-linearity during mechanical loading, indicating that switching occurs.…”

Section: Introductionmentioning

confidence: 99%

“…Building on the work of Kang et al [59][60][61], the present study systematically explores the effects of pre-poling on energy harvesting performance. Previous work showed that reduction in the degree of pre-poling to about 30% of the polarization in the fully poled state gave rise to good energy density.…”

Section: Introductionmentioning

confidence: 99%

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Energy harvesting using ferroelectric/ferroelastic switching: the effect of pre-poling

Kang

Cain

Wang

et al. 2023

Smart Mater. Struct.

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Improved power output and energy density have been achieved in piezoelectric transducers by exploiting ferroelectric/ferroelastic switching. However, a problem is that stable working cycles with polarization switching normally cannot be driven by stress alone. This problem has been addressed by using internal bias fields in a partially poled ferroelectric: the material state is engineered such that compressive stress drives ferroelastic switching during mechanical loading, while residual fields restore the polarized state during unloading. However, although this method has been verified, the devices in engineering material states with the best performance haven’t been explored systematically. In this work, internal bias fields in a partially poled (pre-poled) ferroelectric are used to guide polarization switching, producing an effective energy harvesting cycle. Devices are tested and optimized in the frequency range 1-20Hz, and the influence of the degree of pre-poling in the fabrication process on energy harvesting performance is explored systematically. It is found that pre-poling the ferroelectric ceramic to about 25% of the fully poled state results in a device that can generate a power density up to about 26 mW/cm3 of active material at 20Hz, an improvement on prior work and an order of magnitude advance over conventional piezoelectrics. However, maximizing the power density can result in residual stresses that risk damage to the device during preparation or in service. The relationship between fabrication success rate and pre-poling level is studied, indicating that greater degrees of pre-poling correlate with higher survival rate. This provides a basis for balancing energy conversion with device robustness.

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Section: Device Preparation and Experimental Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy harvesting using ferroelectric/ferroelastic switching: the effect of pre-poling

Kang

Cain

Wang

et al. 2023

Smart Mater. Struct.

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“…Phase transition materials possess the ability to reversibly convert their physical or chemical properties accompanied by the structural transformation between different stable states, which usually endows them with various features such as ferroelectric (FE), − ferroelastic (FA), − ferromagnetic, ferrotoroidicity, dielectric switching, − and nonlinear optical (NLO) switching. − Therefore, these materials have been extensively utilized in energy storage, data storage, signal processing, photoelectric devices, mechanical switches, piezoelectric actuators, transducers, etc . − In thermally induced phase transitions, elevating temperature generally triggers the rotational or vibrational motions of those movable components, thereby inducing disordered–ordered or displacement phase transitions. − These motions typically favor pseudosymmetry and lead to high symmetry in the high-temperature phase (HTP), while decreasing the temperature leads to freezing motions and thereby inducing temperature symmetry-breaking (TSB) phase transitions, which are common in phase transitions with normal symmetry breaking. − On the contrary, an inverse temperature symmetry-breaking (ITSB) phase transition refers to a decrease in lattice symmetry upon heating, which is infrequent in phase transition materials. , For example, Rochelle salt, as a typical ITSB phase transition material, undergoes a ferroelectric phase transition from low-temperature phase (LTP) orthorhombic P 2 1 2 1 2 1 to HTP monoclinic P 2 1 upon a heating process. The ITSB phase transition results in the formation of polar, noncentrical, or chiral structures at a higher temperature, imparting the material unique physical properties under higher temperatures, i.e.…”

Section: Introductionmentioning

confidence: 99%

A High Working Temperature Multiferroic Induced by Inverse Temperature Symmetry Breaking

Zhan,

Zhou,

et al. 2024

J. Am. Chem. Soc.

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Molecular-based multiferroic materials that possess ferroelectric and ferroelastic orders simultaneously have attracted tremendous attention for their potential applications in multiplestate memory devices, molecular switches, and information storage systems. However, it is still a great challenge to effectively construct novel molecular-based multiferroic materials with multifunctionalities. Generally, the structure of these materials possess high symmetry at high temperatures, while processing an obvious order−disorder or displacement-type ferroelastic or ferroelectric phase transition triggered by symmetry breaking during the cooling processes. Therefore, these materials can only function below the Curie temperature (T c ), the low of which is a severe impediment to their practical application. Despite great efforts to elevate T c , designing single-phase crystalline materials that exhibit multiferroic orders above room temperature remains a challenge. Here, an inverse temperature symmetry-breaking phenomenon was achieved in [FPM][Fe 3 (μ 3 -O)(μ-O 2 CH) 8 ] (FPM stands for 3-(3formylamino-propyl)-3,4,5,6-tetrahydropyrimidin-1-ium, which acts as the counterions and the rotor component in the network), enabling a ferroelastoelectric phase at a temperature higher than T c (365 K). Upon heating from room temperature, two-step distinct symmetry breaking with the mm2Fm species leads to the coexistence of ferroelasticity and ferroelectricity in the temperature interval of 365−426 K. In the first step, the FPM cations undergo a conformational flip-induced inverse temperature symmetry breaking; in the second step, a typical ordered−disordered motion-induced symmetry breaking phase transition can be observed, and the abnormal inverse temperature symmetry breaking is unprecedented. Except for the multistep ferroelectric and ferroelastic switching, this complex also exhibits fascinating nonlinear optical switching properties. These discoveries not only signify an important step in designing novel molecular-based multiferroic materials with high working temperatures, but also inspire their multifunctional applications such as multistep switches.

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“…be a measure of the best possible use of the available ambient power. In recent years, concepts of ferroelectric energy harvesting have been investigated in this regard [1][2][3][4][5][6][7][8], having a focus on vibrational mechanical energy exploitation. In contrast to what is today known as piezoelectric energy harvesting [9][10][11][12], having emerged around the turn of the millennium, the switching of lattice cells and domain wall motion, respectively, give rise to a larger electric output processed from an augmented mechanical input.…”

Section: Introductionmentioning

confidence: 99%

Model-based investigations of ferroelectric energy harvesting with regard to an improvement of life span and operability

Warkentin

Behlen

Ricoeur

2023

Smart Mater. Struct.

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A new ferroelectric energy harvesting concept is investigated theoretically, based on a thermo-electromechanical multiscale constitutive framework in connection with the so-called condensed method. Taking advantage of comparatively large changes of strain and polarization due to domain switching, the electric output is higher compared to what is commonly known as piezoelectric energy harvesting. Dissipative self-heating and augmented damage accumulation, on the other hand, may impede the operability of the harvesting device, in particular if tensile stress is required for depolarization, as suggested by recent works. The new harvesting cycle thus dispenses with tensile stresses and instead exploits the potential of existing residual stresses. It is further investigated to which extent a bias field, commonly applied to support repolarization as an important stage of the cycle, can be omitted, saving considerable effort on the technical implementation. Process parameters are obtained from various simulations by pareto-ptimization, considering, inter alia, the effect of ambient temperature.

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Investigation of mechanical energy harvesting cycles using ferroelectric/ferroelastic switching

Cited by 11 publications

References 69 publications

Energy harvesting using ferroelectric/ferroelastic switching: the effect of pre-poling

Energy harvesting using ferroelectric/ferroelastic switching: the effect of pre-poling

A High Working Temperature Multiferroic Induced by Inverse Temperature Symmetry Breaking

Model-based investigations of ferroelectric energy harvesting with regard to an improvement of life span and operability

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