All-Ceramic, compressible and scalable nanofibrous aerogels for subambient daytime radiative cooling

Li，Tao; Sun，Haoyang; Yang，Meng; Zhang，Chentao; Lv，Sha; Li，Bin; Chen，Longhao; Sun，Dazhi

2023-01-15

10.1016/j.cej.2022.139518

CHEMICAL ENGINEERING JOURNAL   Impact Factor & Quartile

1385-8947

1873-3212

Radiative cooling is a passive cooling technology that radiates heat directly to outer space without any additional energy input and is therefore of great significance in reducing the consumption of energy. However, the radiative cooling in subambient daytime is difficult to implement and usually requires complicated structural designs, such as photonic crystals and metamaterials, which are neither cost-effective nor scalable. Here, we demonstrate that silica-alumina nanofibrous aerogels (SAFAs) synthesized by electrospinning can provide a high solar reflectance of ∼95 % and a high atmospheric window emissivity of ∼93 %, owing to the scattering reflection and selective emission of the fiber network in aerogel. During field tests, the SAFAs remain more than 5 °C below the ambient temperature, theoretically yielding a radiative cooling power of ∼133.1 W m. Through scalable manufacturing routes, the SAFAs exhibit high compression fatigue resistance, robust fire resistance and excellent thermal insulation. The low cost and high performance of these SAFAs present great potential for large-scale passive radiative cooling applications.

Aerogel Compression fatigue resistance Heat resistance Radiative cooling Thermal emission

SCI

English

First ; Corresponding

Guangdong Science and Technology Department[2021B1212040001];

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000895628900002

ELSEVIER SCIENCE SA

ENGINEERING

2-s2.0-85139868735

Scopus

Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices,Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Li，Tao,Sun，Haoyang,Yang，Meng,et al. All-Ceramic, compressible and scalable nanofibrous aerogels for subambient daytime radiative cooling[J]. CHEMICAL ENGINEERING JOURNAL,2023,452.

Li，Tao.,Sun，Haoyang.,Yang，Meng.,Zhang，Chentao.,Lv，Sha.,...&Sun，Dazhi.(2023).All-Ceramic, compressible and scalable nanofibrous aerogels for subambient daytime radiative cooling.CHEMICAL ENGINEERING JOURNAL,452.

Li，Tao,et al."All-Ceramic, compressible and scalable nanofibrous aerogels for subambient daytime radiative cooling".CHEMICAL ENGINEERING JOURNAL 452(2023).