纳米孔
复合数
材料科学
辐射传输
辐射冷却
复合材料
纳米技术
光学
气象学
物理
作者
Benchi Ma,Maochang Liu,Yizhou Zhu,Kefan Chen,Lixia Pan,Chaoqian Ai,Dengwei Jing
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2024-06-07
卷期号:7 (12): 5064-5070
标识
DOI:10.1021/acsaem.4c00675
摘要
Energy-free cooling via passive daytime radiative cooling (PDRC) has great potential for various applications. It is still challenging to develop an inexpensive PDRC material with high temperature reduction. Here, we report a micro-nanoporous granular composite film with an outdoor temperature decrease of over 15 °C. The success relies on the unique micro-nanoporous granular structure that couples strong multiple scattering and surface phonon polariton, leading to a high solar reflectance of 96.2%. Significantly, the thermal emissivity reaches 98.3% within the atmospheric transmittance window, which is the highest value reported to date. Moreover, the film presents a hydrophobicity and mechanical elasticity.
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