A smart thermal-gated bilayer membrane for temperature-adaptive radiative cooling and solar heating

被引：35

作者：

Min, Xinzhe ^{[1
]}

Wang, Xueyang ^{[1
]}

Li, Jinlei ^{[1
]}

Xu, Ning ^{[1
]}

Du, Xiran ^{[1
]}

Zeng, Mengyue ^{[1
]}

Li, Wei ^{[2
]}

Zhu, Bin ^{[1
]}

Zhu, Jia ^{[1
]}

机构：

[1] Nanjing Univ, Jiangsu Key Lab Artificial Funct Mat, Collaborat Innovat Ctr Adv Microstruct, Coll Engn & Appl Sci,Natl Lab Solid State Microstr, Nanjing 210093, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, GPL Photon Lab, State Key Lab Luminescence & Applicat, Changchun 130033, Peoples R China

来源：

SCIENCE BULLETIN | 2023年 / 68卷 / 18期

基金：

中国国家自然科学基金;

关键词：

Radiative cooling; Solar heating; SwitchableAl(2)O(3) NPs-composited PNIPAm; hydrogel; Al2O3; nanoparticles; Temperature control; EFFICIENT;

D O I：

10.1016/j.scib.2023.08.003

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Due to the huge energy consumption of traditional cooling-and heating-based electricity, passive radiative cooling and solar heating with a minimum carbon footprint using the outer space and Sun as natural thermodynamic resources have attracted much attention. However, most passive devices are static and monofunctional, and cannot meet the practical requirements of dynamic cooling and heating under various conditions. Here, we demonstrate a smart thermalgated (STG) bilayer membrane that enables fully automatic and temperature-adaptive radiative cooling and solar heating. Specifically, this device can switch from reflective to absorptive (white to black) in the solar wavelength with the reduction in optical scattering upon ambient temperature, corresponding to a sunlight reflectivity change from 0.962 to 0.059 when the temperature drops below similar to 30 degrees C, whereas its mid-infrared emissivity remains at-0.95. Consequently, this STG membrane achieves a temperature of similar to 5 degrees C below ambient (a key signature of radiative cooling) under direct sunlight (peak solar irradiance >900 W m(-2)) in summer and a solar heating power of-550 W m(-2) in winter. Theoretical analysis reveals the substantial advantage of this switch-able cooling/heating device in potential energy saving compared with cooling-only and heating-only strategies when widely used in different climates. It is expected that this work will pave a new pathway for designing temperature-adaptive devices with zero energy consumption and provide an innovative way to achieve sustainable energy.(c) 2023 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.

引用

页码：2054 / 2062

页数：9