论文标题
分层宏纳米孔金属，用于无泄漏的高热电导率形状稳定相变材料
Hierarchical macro-nanoporous metals for leakage-free high-thermal conductivity shape-stabilized phase change materials
论文作者
论文摘要
将相变材料（PCM）浸入多孔介质中是稳定其形状并改善导热率的一种有希望的方法，这对于小型应用的热量存储和热管理至关重要，例如电子设备或电池。但是，在这些复合材料中，仍然缺乏对泄漏如何与多孔材料特征相关的一般理解。结果，能量密度和抗裂解能力通常是拮抗的。在这项工作中，我们克服了当前的局限性，这表明可以通过使用层次宏观纳米孔金属进行PCMS浸渍，可以与高能量密度与出色的抗卵形性能达到高度。 By analyzing capillary phenomena and synthesizing a new type of material, it was demonstrated that a hierarchical trimodal macro-nanoporous metal (copper) provides superior antileakage capability (due to strong capillary forces of nanopores), high energy density (90vol% of PCM load due to macropores) and improves the charging/discharging kinetics, due to a three-fold enhancement of thermal电导率。 CFD模拟进一步证明了这种复合材料可用于电池组的热管理，并且与纯PCM不同，它能够将最高温度保持在安全限制以下。目前的结果为将层次宏纳米多孔金属应用于高能密度，无泄漏和形状稳定的PCM的应用铺平了道路，并具有增强的导热率。这些创新的复合材料可以通过提高其效率，耐用性和可持续性来显着促进紧凑型系统（例如电子设备或高功率电池）的热管理
Impregnation of Phase Change Materials (PCMs) into a porous medium is a promising way to stabilize their shape and improve thermal conductivity which are essential for thermal energy storage and thermal management of small-size applications, such as electronic devices or batteries. However, in these composites a general understanding of how leakage is related to the characteristics of the porous material is still lacking. As a result, the energy density and the antileakage capability are often antagonistically coupled. In this work we overcome the current limitations, showing that a high energy density can be reached together with superior anti-leakage performance by using hierarchical macro-nanoporous metals for PCMs impregnation. By analyzing capillary phenomena and synthesizing a new type of material, it was demonstrated that a hierarchical trimodal macro-nanoporous metal (copper) provides superior antileakage capability (due to strong capillary forces of nanopores), high energy density (90vol% of PCM load due to macropores) and improves the charging/discharging kinetics, due to a three-fold enhancement of thermal conductivity. It was further demonstrated by CFD simulations that such a composite can be used for thermal management of a battery pack and unlike pure PCM it is capable of maintaining the maximum temperature below the safety limit. The present results pave the way for the application of hierarchical macro-nanoporous metals for high-energy density, leakage-free, and shape-stabilized PCMs with enhanced thermal conductivity. These innovative composites can significantly facilitate the thermal management of compact systems such as electronic devices or high-power batteries by improving their efficiency, durability and sustainability
