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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201907927
|2 doi
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|a pubmed24n1038.xml
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|a (DE-627)NLM311457711
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|a (NLM)32567148
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Chen, Yuqi
|e verfasserin
|4 aut
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|a An All-Scale Hierarchical Architecture Induces Colossal Room-Temperature Electrocaloric Effect at Ultralow Electric Field in Polymer Nanocomposites
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 16.11.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Composed of electrocaloric (EC) ceramics and polymers, polymer composites with high EC performances are considered as promising candidates for next-generation all-solid-state cooling devices. Their mass application is limited by the low EC strength, which requires very high operational voltage to induce appreciable temperature change. Here, an all-scale hierarchical architecture is proposed and demonstrated to achieve high EC strength in poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene)-based nanocomposites. On the atomic scale, highly polarizable hierarchical interfaces are induced by incorporating BiFeO3 (BFO) nanoparticles in Ba(Zr0.21 Ti0.79 )O3 (BZT) nanofibers (BFOBZT_nfs); on the microscopic scale, percolation of the interfaces further raises the polarization of the composite nanofibers; on the mesoscopic scale, orthotropic orientation of BFO@BZT_nfs leads to much enhanced breakdown strength of the nanocomposites. As a result, an ultrahigh EC strength of ≈0.22 K m MV-1 is obtained at an ultralow electric field of 75 MV m-1 in nanocomposites filled with the orthotropic composite nanofibers, which is by far the highest value achieved in polymer nanocomposites at a moderate electric field. Results of high-angle annular dark-field scanning transmission electron microscopy, in situ scanning Kelvin probe microscopy characterization, and phase-field simulations all indicate that the much enhanced EC performances can be attributed to the all-scale hierarchical structures of the nanocomposite
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|a Journal Article
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|a compound configuration
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|a electrocaloric effect
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|a interfacial polarization
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|a polymer nanocomposites
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| 700 |
1 |
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|a Qian, Jianfeng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yu, Jinyao
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Guo, Mengfan
|e verfasserin
|4 aut
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1 |
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|a Zhang, Qinghua
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Jiang, Jianyong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shen, Zhonghui
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Long-Qing
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shen, Yang
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 32(2020), 30 vom: 15. Juli, Seite e1907927
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
1 |
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|g volume:32
|g year:2020
|g number:30
|g day:15
|g month:07
|g pages:e1907927
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|u http://dx.doi.org/10.1002/adma.201907927
|3 Volltext
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|d 32
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|e 30
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|h e1907927
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