Giant room temperature elastocaloric effect in metal-free thin-film perovskites
Abstract Solid-state refrigeration which is environmentally benign has attracted considerable attention. Mechanocaloric (mC) materials, in which the phase transitions can be induced by mechanical stresses, represent one of the most promising types of solid-state caloric materials. Herein, we have de...
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2021
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oai:doaj.org-article:816ea54cdb404ccf9da6e99baebb777a2021-12-02T17:08:43ZGiant room temperature elastocaloric effect in metal-free thin-film perovskites10.1038/s41524-021-00599-12057-3960https://doaj.org/article/816ea54cdb404ccf9da6e99baebb777a2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41524-021-00599-1https://doaj.org/toc/2057-3960Abstract Solid-state refrigeration which is environmentally benign has attracted considerable attention. Mechanocaloric (mC) materials, in which the phase transitions can be induced by mechanical stresses, represent one of the most promising types of solid-state caloric materials. Herein, we have developed a thermodynamic phenomenological model and predicted extraordinarily large elastocaloric (eC) strengths for the (111)-oriented metal-free perovskite ferroelectric [MDABCO](NH4)I3 thin-films. The predicted room temperature isothermal eC ΔS eC/Δσ (eC entropy change under unit stress change) and adiabatic eC ΔT eC/Δσ (eC temperature change under unit stress change) for [MDABCO](NH4)I3 are −60.0 J K−1 kg−1 GPa−1 and 17.9 K GPa−1, respectively, which are 20 times higher than the traditional ferroelectric oxides such as BaTiO3 thin films. We have also demonstrated that the eC performance can be improved by reducing the Young’s modulus or enhancing the thermal expansion coefficient (which could be realized through chemical doping, etc.). We expect these discoveries to spur further interest in the potential applications of metal-free organic ferroelectrics materials towards next-generation eC refrigeration devices.Cheng LiYu Hui HuangJian-Jun WangBo WangYong Jun WuHe TianLong-Qing ChenZijian HongNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Computer softwareQA76.75-76.765ENnpj Computational Materials, Vol 7, Iss 1, Pp 1-8 (2021) |
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DOAJ |
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DOAJ |
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Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765 |
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Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765 Cheng Li Yu Hui Huang Jian-Jun Wang Bo Wang Yong Jun Wu He Tian Long-Qing Chen Zijian Hong Giant room temperature elastocaloric effect in metal-free thin-film perovskites |
| description |
Abstract Solid-state refrigeration which is environmentally benign has attracted considerable attention. Mechanocaloric (mC) materials, in which the phase transitions can be induced by mechanical stresses, represent one of the most promising types of solid-state caloric materials. Herein, we have developed a thermodynamic phenomenological model and predicted extraordinarily large elastocaloric (eC) strengths for the (111)-oriented metal-free perovskite ferroelectric [MDABCO](NH4)I3 thin-films. The predicted room temperature isothermal eC ΔS eC/Δσ (eC entropy change under unit stress change) and adiabatic eC ΔT eC/Δσ (eC temperature change under unit stress change) for [MDABCO](NH4)I3 are −60.0 J K−1 kg−1 GPa−1 and 17.9 K GPa−1, respectively, which are 20 times higher than the traditional ferroelectric oxides such as BaTiO3 thin films. We have also demonstrated that the eC performance can be improved by reducing the Young’s modulus or enhancing the thermal expansion coefficient (which could be realized through chemical doping, etc.). We expect these discoveries to spur further interest in the potential applications of metal-free organic ferroelectrics materials towards next-generation eC refrigeration devices. |
| format |
article |
| author |
Cheng Li Yu Hui Huang Jian-Jun Wang Bo Wang Yong Jun Wu He Tian Long-Qing Chen Zijian Hong |
| author_facet |
Cheng Li Yu Hui Huang Jian-Jun Wang Bo Wang Yong Jun Wu He Tian Long-Qing Chen Zijian Hong |
| author_sort |
Cheng Li |
| title |
Giant room temperature elastocaloric effect in metal-free thin-film perovskites |
| title_short |
Giant room temperature elastocaloric effect in metal-free thin-film perovskites |
| title_full |
Giant room temperature elastocaloric effect in metal-free thin-film perovskites |
| title_fullStr |
Giant room temperature elastocaloric effect in metal-free thin-film perovskites |
| title_full_unstemmed |
Giant room temperature elastocaloric effect in metal-free thin-film perovskites |
| title_sort |
giant room temperature elastocaloric effect in metal-free thin-film perovskites |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/816ea54cdb404ccf9da6e99baebb777a |
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