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	A smart thermal-gated bilayer membrane for temperature-adaptive radiative cooling and solar heating
	X. Min, X. Wang, J. Li, N. Xu, X. Du, M. Zeng, W. Li, B. Zhu and J. Zhu
	2023
ISSN号	20959273
DOI	10.1016/j.scib.2023.08.003
英文摘要	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 thermal-gated (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 ∼30 °C, whereas its mid-infrared emissivity remains at ∼0.95. Consequently, this STG membrane achieves a temperature of ∼5 °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 switchable 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. © 2023 Science China Press
URL标识	查看原文
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/67773]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	X. Min, X. Wang, J. Li, N. Xu, X. Du, M. Zeng, W. Li, B. Zhu and J. Zhu. A smart thermal-gated bilayer membrane for temperature-adaptive radiative cooling and solar heating[J],2023.
APA	X. Min, X. Wang, J. Li, N. Xu, X. Du, M. Zeng, W. Li, B. Zhu and J. Zhu.(2023).A smart thermal-gated bilayer membrane for temperature-adaptive radiative cooling and solar heating..
MLA	X. Min, X. Wang, J. Li, N. Xu, X. Du, M. Zeng, W. Li, B. Zhu and J. Zhu."A smart thermal-gated bilayer membrane for temperature-adaptive radiative cooling and solar heating".(2023).

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