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Electrochemically Driven Thermal Regulation Device for Dynamic Switching between Daytime Radiative Cooling and Solar

Shenghao Jin1,2,3, Tao Xie1,2,3,4, Jiahao Hou1,2,3,4

  • 12020 X-Lab, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.

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Summary
This summary is machine-generated.

This study introduces a new device for dynamic switching between daytime radiative cooling and solar heating. It achieves efficient, all-seasonal thermal regulation for buildings using novel technology.

Keywords:
electrochromic devicesreversible metal electrodepositionsolar heatingsubambient daytime radiative cooling

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Area of Science:

  • Materials Science
  • Optics
  • Energy

Background:

  • Dynamic switching between daytime radiative cooling (DRC) and solar heating (SH) is crucial for energy-saving thermal regulation.
  • Existing devices often struggle with efficient solar energy harvesting due to limited spectral modulation.
  • Adaptability to environmental conditions is key for sustainable building and outdoor facility thermal management.

Purpose of the Study:

  • To develop a novel device for active and in situ switching between SH and DRC states.
  • To overcome the limitations of existing SH/DRC switchers in solar spectrum modulation.
  • To demonstrate superior performance in thermal regulation and energy saving.

Main Methods:

  • Integration of reversible metal electrodeposition (RMED) technology with an optical metamaterial absorber.
  • Development of a device enabling active switching between SH/DRC states.
  • Validation through outdoor temperature measurements and building-level energy-saving simulations.

Main Results:

  • Achieved a large modulation contrast of ΔA_sol = 0.82 for solar absorptance switching.
  • Demonstrated superior performance in dynamic thermal regulation.
  • Validated energy-saving potential through simulations and outdoor measurements.

Conclusions:

  • The novel device offers an effective solution for all-seasonal thermal regulation with high environmental adaptability.
  • The integration of RMED and metamaterials opens new avenues for dynamic photonic devices.
  • This work highlights the potential of RMED in creating highly efficient and adaptable thermal management solutions.