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TUhjnbcbe - 2021/11/26 17:28:00
Bean-Pod-Inspired3D-PrintedPhaseChangeMicrolatticesforSolar-ThermalEnergyHarvestingandStorage

发表状态:

nanomicrosmall年6月19日

研究团队:

ZhengpengYang,ShengminJia,YutaoNiu,XiaotingLv,HuiliFu,YongyiZhang,*

DapengLiu,BinWang,andQingwenLi*

研究内容:

高效、可靠的相变材料封装是实现高性能太阳能集热与储存的关键。然而,制造业的可扩展性、能量存储/释放的高效率以及熔融pcm的抗泄漏性仍然是挑战。本文以天然豆科植物为灵感,提出了一种简便、可扩展的基于挤压的核-鞘三维打印策略,用于直接构建豆荚结构的十八烷(OD)/石墨烯(BOG)相变微晶格,具有规则的多孔结构以及将OD“豆子”单独有效地封装成高度互连的石墨烯网络包装层,该包装层由紧密堆叠和排列的石墨烯片构成。独特的结构特征使得光可以很容易地传播到相变微晶格内部,其横向导热系数高达1.67Wm?1公里?1、太阳能热能的快速收集和转移,从而提供了较高的太阳能热能储存效率和Jg的大相变焓?次循环后保留率为99.1%。最重要的是,这种封装的pcm具有优异的热可靠性和稳定性,即使在次热循环下也不会发生泄漏和形状变化,不会造成BOG的部分损坏。这项工作验证了可缩放印刷实用封装pcm的可行性,为太阳能储能器件用复合pcm的制备带来了革命性的变化。

Abstract

Effectiveandreliableencapsulationofphasechangematerials(PCMs)isessentialandcriticaltothehigh-performancesolar-thermalenergyharvestingandstorage.However,challengesremainpertainingtomanufacturingscalability,highefficiencyinenergystorage/release,andanti-leakageofmeltedPCMs.Herein,inspiredbynaturallegume,afacileandscalableextrusion-basedcoresheath3Dprintingstrategyisdemonstratedfordirectlyconstructingbean-podstructuredoctadecane(OD)/graphene(BOG)phasechangemicrolattices,withregularporousconfigurationaswellasindividualandeffectiveencapsulationofOD“beans”intohighlyinterconnectedgraphenenetworkwrappinglayerbuiltbycloselystackedandalignedgraphenesheets.Theuniquearchitecturalfeaturesenablethereadyspreadingoflightintotheinteriorofphasechangemicrolattice,ahightransversalthermalconductivityof1.67Wm?1K?1,andrapidsolar-thermalenergyharvestingandtransfer,therebydeliveringahighsolar-thermalenergystorageefficiency,andalargephasechangeenthalpyofJg?1with99.1%retentionaftercycles.Mostimportantly,suchencapsulatedPCMsfeatureanexceptionalthermalreliabilityandstability,withnoleakageandshapevariationevenatthermalcyclesandpartialdamageofBOG.ThisworkvalidatesthefeasibilityofscalablyprintingpracticalencapsulatedPCMs,whichmayrevolutionizethefabricationof

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