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Polymer nanocomposite dielectrics with high electrocaloric effect for flexible solid-state cooling devices

高性能电卡效应纳米复合电介质用于柔性固态制冷器件

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Abstract

Nanocomposite dielectrics show great promising application in developing next generation wearable all-solid-state cooling devices owing to the possessed advantages of high cooling efficiency, light-weight and small volume without the induced greenhouse effect or serious harm to ozone layer in the exploited refrigerants. However, low electrocaloric strength in nanocomposite dielectric is severely restricting its wide-spread application because of high applied operating voltage to improve electrocaloric effect. After addressing the chosen optimized ferroelectric ceramic and ferroelectric polymer matrix in conjunction with the analysis of crucial parameters, recent progress of electrocaloric effect (ECE) in polymer nanocomposites has been considerably reviewed. Subsequently, prior to proposing the conceptual design and devices/systems in electrocaloric nanocomposites, the existing developed devices/systems are reviewed. Finally, conclusions and prospects are conducted, including the aspects of materials chosen, structural design and key issues to be considered in improving electrocaloric effect of polymer nanocomposite dielectrics for flexible solidstate cooling devices.

摘要

纳米复合电介质具有制冷效率高、重量轻、体积小、不产生温室效应、对臭氧层无严重危害等优异性能,在开发下一代可穿戴全固态制冷器件方面具有广阔的应用前景。然而,纳米复合电介质的低电卡强度严重限制了其广泛应用,通常需要高加载电压来改善其电卡效应。首先,通过对铁电陶瓷和铁电聚合物基体的优化选取及电卡性能重要参数进行分析,介绍了聚合物纳米复合材料电卡效应的最新研究进展。随后,对现有的器件/制冷系统进行了分析,系统综述了围绕电卡纳米复合材料进行的器件概念设计及系统优化设计。最后,从材料选择、结构设计以及改善柔性固态制冷器件方面,围绕聚合物纳米复合电介质仍需考虑的主要问题进行了总结,并对其发展前景进行了展望。

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Authors and Affiliations

  1. Research Institute of Aerospace Technology, Central South University, Changsha, 410083, China

    Hai-long Hu  (胡海龙)

  2. Research Center in Intelligent Thermal Structures for Aerospace, Central South University, Changsha, 410083, China

    Hai-long Hu  (胡海龙)

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  1. Hai-long Hu  (胡海龙)
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Correspondence to Hai-long Hu  (胡海龙).

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HU Hai-long declares that he has no known competing financial interests or personal relationships to influence the work reported in this paper.

Foundation item: Project(202045007) supported by the Start-up Funds for Outstanding Talents in Central South University, China

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Hu, Hl. Polymer nanocomposite dielectrics with high electrocaloric effect for flexible solid-state cooling devices. J. Cent. South Univ. 29, 2857–2872 (2022). https://doi.org/10.1007/s11771-022-5151-1

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