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Dynamic electrochromism for all-season radiative thermoregulation

Author

Listed:
  • Chenxi Sui

    (University of Chicago
    Duke University)

  • Jiankun Pu

    (Carnegie Mellon University)

  • Ting-Hsuan Chen

    (Duke University)

  • Jiawei Liang

    (Duke University)

  • Yi-Ting Lai

    (Duke University
    Ming Chi University of Technology)

  • Yunfei Rao

    (Duke University
    Zhejiang Sci-Tech University)

  • Ronghui Wu

    (University of Chicago)

  • Yu Han

    (University of Chicago)

  • Keyu Wang

    (Duke University)

  • Xiuqiang Li

    (Duke University
    Nanjing University of Aeronautics and Astronautics)

  • Venkatasubramanian Viswanathan

    (Carnegie Mellon University)

  • Po-Chun Hsu

    (University of Chicago
    Duke University)

Abstract

Radiative thermoregulation can reduce the energy consumption for heating, ventilation and air-conditioning (HVAC) in buildings, and therefore contribute substantially to climate change mitigation. Electrochromism, a phenomenon in which a material exhibits reversible colour changes under an external electrical stimulus, can help control the heat balance of buildings in response to fluctuating weather conditions; however, its implementation has been largely limited to visible and near-infrared wavelength regimes. Here we develop an aqueous flexible electrochromic design for use as a building envelop based on graphene ultra-wideband transparent conductive electrode and reversible copper electrodeposition, in which the thermal emissivity can be tailored to vary between 0.07 and 0.92 with excellent long-term durability. Building energy simulations show that our design as building envelopes can save on year-round operational HVAC energy consumption across the United States by up to 43.1 MBtu on average in specific zones. Such dynamic emissivity tunability can further serve as a non-destructive technological solution to retrofit poorly insulated or historic buildings. Our work suggests a feasible pathway to radiative thermoregulation for more energy-efficient HVAC and solving some of the global climate change issues.

Suggested Citation

  • Chenxi Sui & Jiankun Pu & Ting-Hsuan Chen & Jiawei Liang & Yi-Ting Lai & Yunfei Rao & Ronghui Wu & Yu Han & Keyu Wang & Xiuqiang Li & Venkatasubramanian Viswanathan & Po-Chun Hsu, 2023. "Dynamic electrochromism for all-season radiative thermoregulation," Nature Sustainability, Nature, vol. 6(4), pages 428-437, April.
  • Handle: RePEc:nat:natsus:v:6:y:2023:i:4:d:10.1038_s41893-022-01023-2
    DOI: 10.1038/s41893-022-01023-2
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    Citations

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    Cited by:

    1. Zhuofei Jia & Yiming Sui & Long Qian & Xi Ren & Yunxiang Zhao & Rui Yao & Lumeng Wang & Dongliang Chao & Cheng Yang, 2024. "Electrochromic windows with fast response and wide dynamic range for visible-light modulation without traditional electrodes," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Roisul Hasan Galib & Yanpei Tian & Yue Lei & Saichao Dang & Xiaole Li & Arief Yudhanto & Gilles Lubineau & Qiaoqiang Gan, 2023. "Atmospheric-moisture-induced polyacrylate hydrogels for hybrid passive cooling," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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