Enhanced pyroelectric performance in Na0.5Bi0.5TiO3-xNa0.5Bi4.5Ti4O15 lead-free ferroelectric ceramics via composition and microstructure engineering

Hu, Liangwei; Fan, Botao; Fang, Ziyan; Zhang, Guanghui; Zhang, Qingfen; Zhang, Guangzu; Zhang, Haibo; Jiang, Shenglin; Chen, Yong; Shen, Meng

doi:10.1016/j.actamat.2022.118194

Cited by 18 publications

(12 citation statements)

References 48 publications

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“…The X-ray diffraction (XRD) (D8 Advance, Bruker, Germany) was utilized to characterize crystal structure. The refined data were obtained through Rietveld method on the basis of the slow-scan XRD data by using the GSAS-EXPGUI software and the Na 0.5 Bi 0.5 TiO 3 (space group R3c) CIF was chosen as the initial model 40,41 .…”

Section: Compositional Heterogeneity and Microstructure Characterizationmentioning

confidence: 99%

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

Shen,

Liu,

Zhang

et al. 2023

Nat Commun

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Pyroelectric energy harvesting has received increasing attention due to its ability to convert low-grade waste heat into electricity. However, the low output energy density driven by low-grade temperature limits its practical applications. Here, we show a high-performance hybrid BNT-BZT-xGaN thermal energy harvesting system with environmentally friendly lead-free BNT-BZT pyroelectric matrix and high thermal conductivity GaN as dopant. The theoretical analysis of BNT-BZT and BNT-BZT-xGaN with x = 0.1 wt% suggests that the introduction of GaN facilitates the resonance vibration between Ga and Ti, O atoms, which not only contributes to the enhancement of the lattice heat conduction, but also improves the vibration of TiO6 octahedra, resulting in simultaneous improvement of thermal conductivity and pyroelectric coefficient. Therefore, a thermoelectric coupling enhanced energy harvesting density of 80 μJ cm−3 has been achieved in BNT-BZT-xGaN ceramics with x = 0.1 wt% driven by a temperature variation of 2 oC, at the optical load resistance of 600 MΩ.

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Section: Compositional Heterogeneity and Microstructure Characterizationmentioning

confidence: 99%

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

Shen,

Liu,

Zhang

et al. 2023

Nat Commun

Self Cite

View full text Add to dashboard Cite

show abstract

“…The X-ray diffraction (XRD) (D8 Advance, Bruker, Germany) was utilized to characterize crystal structure. The re ned data were obtained through Rietveld method on the basis of the slow-scan XRD data by using the GSAS-EXPGUI software and the Na 0.5 Bi 0.5 TiO 3 (space group R3c) CIF was chosen as the initial model [19][20].…”

Section: Compositional Heterogeneity Analysis and Microstructure Char...mentioning

confidence: 99%

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

Shen

Liu

Zhang

et al. 2023

Preprint

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Pyroelectric energy harvesting has received increasing attention in recent years due to its ability to convert low-grade waste heat into electricity for sustainable development. However, the low output energy density driven by low-grade temperature limits its practical applications. Here, we report a high-performance hybrid BNT-BZT-xGaN thermal energy harvesting system with environmentally friendly lead-free BNT-BZT pyroelectric matrix and high thermal conductivity GaN as dopant. The theoretical analysis of BNT-BZT and BNT-BZT-xGaN with x = 0.1 wt% suggests that the introduction of GaN facilitates the resonance vibration between Ga and Ti, O atoms, which not only contributes to the enhancement of the lattice heat conduction, but also improves the vibration of TiO6 octahedra, resulting in simultaneous improvement of thermal conductivity and pyroelectric coefficient. Therefore, a thermoelectric coupling enhanced energy harvesting density of 80 µJ cm−3 has been achieved in BNT-BZT-xGaN ceramics with x = 0.1 wt% driven by a temperature gradient of 2 oC, at the optical load resistance of 600 MΩ. This theoretical understanding provides a guidance to establish new principles for designing pyroelectric materials with further improved thermal energy harvesting performance.

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“…Bismuth sodium titanate (Na 0.5 Bi 0.5 TiO 3 ) is a type of representative ferroelectric and belongs to the ABO 3 perovskite family with equational occupation of Na + and Bi 3+ in A-site, which owns high conductivity and Curie temperature, moderate piezoelectric coefficient and band gap, and has shown potential applications in photocatalysis, piezocatalysis, and piezo-photocatalysis fields. − However, its catalytic activity is not high enough because of its relative wide band gap and relatively low piezoelectric coefficient . For overcoming its deficiencies, some techniques have been developed by researchers, such as ions doping, ,− formation of heterojunction with other materials, ,, and plasmonic effect. , …”

Section: Introductionmentioning

confidence: 99%

Na_0.5Bi_0.5TiO₃:Y³⁺@PAN Nanofibers for Photocatalysis Using Synergetic Piezoelectric Effects

Yuan,

Liu,

Liu

et al. 2024

ACS Appl. Nano Mater.

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A series of Na0.5Bi0.5TiO3-based catalysts were synthesized by using the solvothermal route. The successful synthesis of catalysts was confirmed by various measurements. The influence of Y3+ doping on the band gap was revealed by the UV–visible absorbance spectra. Their photocatalytic, piezocatalytic, and piezo-photocatalytic activities were investigated by degrading methylene blue. The results show that the Y3+ doping can enhance the catalytic activity of Na0.5Bi0.5TiO3 due to the more efficient harvesting of light, and the catalytic activity can be further enhanced by the support of polyacrylonitrile nanofibers on account of the existence of more active sites. The reaction constants of Na0.5Bi0.485Y0.015TiO3 and Na0.5Bi0.485Y0.015TiO3@PAN in photocatalysis processes are 0.0075 and 0.0112 min–1, which is 1.23 and 1.84 times as many as that of Na0.5Bi0.5TiO3. In addition, the catalysts show higher catalytic activities when the catalysis is carried out at the operating condition including both simulated sunlight irradiation and ultrasonic vibration. The reaction constant of Na0.5Bi0.485Y0.015TiO3@PAN in piezo-photocatalysis is 0.0381 min–1, which is 3.09 and 6.77 times of photocatalysis and piezocatalysis. The enhanced activity results from suppression of charge carrier recombination. The radicals of •O2 – and h+ play actual roles in the catalytic processes.

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Enhanced pyroelectric performance in Na0.5Bi0.5TiO3-xNa0.5Bi4.5Ti4O15 lead-free ferroelectric ceramics via composition and microstructure engineering

Cited by 18 publications

References 48 publications

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

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

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

Na_0.5Bi_0.5TiO₃:Y³⁺@PAN Nanofibers for Photocatalysis Using Synergetic Piezoelectric Effects

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Enhanced pyroelectric performance in Na0.5Bi0.5TiO3-xNa0.5Bi4.5Ti4O15 lead-free ferroelectric ceramics via composition and microstructure engineering

Cited by 18 publications

References 48 publications

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

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

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

Na0.5Bi0.5TiO3:Y3+@PAN Nanofibers for Photocatalysis Using Synergetic Piezoelectric Effects

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Product

Resources

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Na_0.5Bi_0.5TiO₃:Y³⁺@PAN Nanofibers for Photocatalysis Using Synergetic Piezoelectric Effects