Thermoelectric coupling effect in BNT-BZT-xGaN pyroelectric ceramics for low-grade temperature-driven energy harvesting

Shen, Meng; Liu, Kun; Zhang, Guanghui; Li, Qifan; Zhang, Guangzu; Zhang, Qingfeng; Zhang, Haibo; Jiang, Shenglin; Chen, Yong; Yao, Kui

doi:10.1038/s41467-023-43692-3

Cited by 13 publications

(2 citation statements)

References 45 publications

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“…The electrical potential distribution and electric field intensity are uniform along the BNT inclusions. Thermal strain induction increases strain owing to thermal boundary conditions, which will help strengthen the thermoelectric effect over piezoelectric inclusions [59][60][61]. The geometry is heated on one side in figure 8(ii), and a thermal boundary condition is imposed on the exact boundary where mechanical loading is applied.…”

Section: Electric Potential Distributionmentioning

confidence: 99%

“…. Moreover, the piezoelectric coefficients exhibit an increase in effectiveness as temperature rises, mostly attributed to the assistance provided by thermoelectric coupling [59][60][61]. This phenomenon becomes more pronounced at elevated temperatures and when a larger proportion of the material consists of piezoelectric inclusions.…”

Section: Effects Of Thermal Boundary Conditions On Effective Piezoele...mentioning

confidence: 99%

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The influence of thermo-electromechanical coupling on the performance of lead-free BNT-PDMS piezoelectric composites

Akshayveer,

Buroni,

Melnik

et al. 2024

Smart Mater. Struct.

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In recent times, there have been notable advancements in haptic technology,particularly in screens found on mobile phones, laptops, light-emittingdiode (LED) screens, and control panels. However, it is essentialto note that the progress in high-temperature haptic applicationsis still in the developmental phase. Due to its complex phase anddomain structures, lead-free piezoelectric materials such as {\normalsize{}$Bi_{0.5}Na_{0.5}TiO_{3}$}(BNT)-based haptic technology behave differently at high temperaturesthan ambient conditions. Therefore, it is essential to investigatethe aspects of thermal management and thermal stability, as temperatureplays a vital role in the phase and domain transition of BNT material.A two-dimensional thermo-electromechanical model has been proposedin this study to analyze the thermal stability of the BNT-PDMS compositeby analyzing the impact of temperature on effective electromechanicalproperties and mechanical and electric field parameters. However,the thermo-electromechanical modelling of the BNT-PDMS composite examinesthe macroscopic effects of the applied thermal field on mechanicaland electric field parameters, as phase change and microdomain dynamicsare not considered in this model. This study analyzes the impact ofthermo-electromechanical coupling on the performance of the BNT-PDMScomposite compared to conventional electromechanical coupling. Theresults predicted a significant improvement in piezoelectric responsecompared to electromechanical coupling due to increased thermoelectriceffect in the absence of phase change and microdomain switching fortemperature boundary conditions below depolarization temperature ($T_{d}\sim200\lyxmathsym{\textcelsius}$for pure BNT material).

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Section: Electric Potential Distributionmentioning

confidence: 99%

Section: Effects Of Thermal Boundary Conditions On Effective Piezoele...mentioning

confidence: 99%

The influence of thermo-electromechanical coupling on the performance of lead-free BNT-PDMS piezoelectric composites

Akshayveer,

Buroni,

Melnik

et al. 2024

Smart Mater. Struct.

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Elastic Polarization Configuration Coupled with Activity Rattling Space Boosts Energy Harvesting Performance of Lead‐Free Piezoceramic

Xi,

Hou,

Zheng

et al. 2024

Adv Funct Materials

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Piezoelectric energy harvesting technology is drawing substantial attention as an eco‐friendly method to promote energy transformation, which is at the forefront of current scientific research. However, the difficulties involved in obtaining a stable output voltage (Vout) and a controllable output current density (Iout) represent bottlenecks in the development of piezoelectric energy harvesters (PEHs) for practical applications. Here, a novel strategy that couples elastic polarization configuration with activity rattling space in lead‐free potassium sodium niobate‐based piezoceramics is proposed to break through this barrier. The cantilever beam‐type PEHs assembled using the rationally designed piezoceramic system show a stable Vout (≈22 V) and a controllable Iout over the range from 6.09 to 20.16 µA cm−2, which is sufficient to drive multiple types of wireless sensors that have the same rated voltage but different rated current requirements. These fantastic power generation performances are associated with a stable piezoelectric voltage coefficient (g33), an increasing piezoelectric charge coefficient (d33), and a weakened electrostrictive coefficient (Q33) that stem from polarization configuration optimization in combination with introduction of the activity rattling space design. This work provides a good approach to modulation of the overall performance of piezoelectric materials to meet the demands of advanced PEH applications.

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Ferroelectric Nanomaterials for Energy Harvesting and Self‐Powered Sensing Applications

Yu,

Ji,

Zhang

et al. 2024

Advanced Sensor Research

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The rapid development of the Internet of Things has introduced new challenges for miniaturized, highly integrated energy harvesters and sensors, promoting the exploration of various novel nanomaterials. Ferroelectric nanomaterials, characterized by large remanent polarization, exceptional dielectric properties, outstanding chemical stability, and diverse electricity generation capabilities, are emerging as promising candidates in a variety of fields. Possessing various mechanisms for electricity generation, including piezoelectric, pyroelectric, photovoltaic, and triboelectric effects, ferroelectric nanomaterials demonstrate their capability for harvesting and sensing multiple energies simultaneously, including light, thermal, and mechanical energies. This capability contributes to the miniaturization and high integration of electronic devices. This article reviews recent achievements in ferroelectric nanomaterials and their applications in energy harvesting and self‐powered sensing. Different categories of ferroelectric nanomaterials, their ferroelectric properties, and fabrication methods are introduced. The working mechanisms and performance of ferroelectric energy harvesters and self‐powered sensors are described. Additionally, future prospects are discussed.

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Thermoelectric coupling effect in BNT-BZT-xGaN pyroelectric ceramics for low-grade temperature-driven energy harvesting

Cited by 13 publications

References 45 publications

The influence of thermo-electromechanical coupling on the performance of lead-free BNT-PDMS piezoelectric composites

The influence of thermo-electromechanical coupling on the performance of lead-free BNT-PDMS piezoelectric composites

Elastic Polarization Configuration Coupled with Activity Rattling Space Boosts Energy Harvesting Performance of Lead‐Free Piezoceramic

Ferroelectric Nanomaterials for Energy Harvesting and Self‐Powered Sensing Applications

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