Highly efficient pyroelectric generator for waste heat recovery without auxiliary device

Kang, Xilong; Jia, Shuhai; Xu, Renyi; Liu, Saibei; Peng, Jun; Yu, Hongqiang; Zhou, Xing

doi:10.1016/j.nanoen.2021.106245

Cited by 26 publications

(8 citation statements)

References 53 publications

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“…Also, the practical applicability of the thermal energy harvesting device induced by low temperature gradient is illustrated in supplementary Video V2. The BNT-BZT-xGaN ceramics with x = 0.1 wt% exhibit superior pyroelectric energy density driven by unit temperature gradient in comparison with state-of-the-art pyroelectric energy harvesting systems (as shown in Table 1), which have great potential application in low temperature driven thermal energy harvesting devices [16, [33][34][35][36][37][38][39][40][41][42][43][44][45].…”

Section: Dielectric and Ferroelectric Propertiesmentioning

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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Section: Dielectric and Ferroelectric Propertiesmentioning

confidence: 99%

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

Shen

Liu

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…In addition, the polarisation of the material is limited by its characteristics, the recovery of energy is weak and different researchers calculate the standard of energy recovery differently, which affect the judgement of the quality of the pyroelectric device. Therefore, in 2021, Kang et al 76 reported an efficient pyroelectric generator without an auxiliary device. They made nanocomposites by using P(VDF-TrFE-CFE) as the substrate with barium strontium titanate (BST) nanoparticles and boron nitride (BN) nanosheets, which have high polarizability and high thermal conductivity.…”

Section: Principle and Classification Of Self-powered Technologymentioning

confidence: 99%

Self-powered sensors for biomarker detection

Yang

et al. 2023

Sens. Diagn.

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“…123 The pyroelectric generator unit may be developed to better use external vibration to achieve waste heat recovery without an auxiliary device, which has tremendous potential and application value in the field of waste heat recovery. 124 There is also a pressing need for advanced waste energy recovery for CO 2 emission reduction. Figure 7 shows the top 10 countries and funding sponsors in ''waste heat recovery'' research according to the Scopus database (as of January 22, 2022).…”

Section: Roadmap For Nano-engineered Materials Commercializationmentioning

confidence: 99%