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Fast Photothermal Regulation of All-in-One Electrochromic Dynamic Windows Based on Synergetic Electrodeposition of CuBi and MnO2
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DOI：10.1002/adfm.202530886.png)
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Abstract
En 中文
Electrochromic dynamic windows represent an attractive avenue for enhancing the energy-saving efficiency of buildings. However, the practical application of dynamic windows remains in its infancy due to challenges related to efficient optical modulation and cost-effective manufacturing. Herein, we report an all-in-one electrochromic dynamic window through synergetic electrodeposition of CuBi and MnO2, featuring a simplified three-layer configuration. The synergy of dual electrodeposition, coupled with Br−/Br3− redox pair, endows the CuBi//MnO2 system with reversible color transitions between transparent and brown-black states. Benefiting from a well-balanced charge distribution, the CuBi//MnO2 system demonstrates superior photothermal regulation in the visible-near-infrared region, including large optical modulation of 90.6% at 500 nm and 58% at 1100 nm, short response time of 16.1/12.9 s at 500 nm and 21.4/8.1 s at 1100 nm in coloration/bleaching processes. Outdoor test indicates that the assembled large-size dynamic window can lower the temperature by 5 to 10°C within a homemade house. Further simulation suggests that implementing the dynamic window can reduce annual energy consumption in buildings by up to 95.7 MJ/m2 and decrease average CO2 emissions by 18.8 kg/m2 in subtropical regions of China. Our work offers a straightforward and effective strategy for developing low-cost energy-saving dynamic window technologies.
Keywords:
dynamic windows
electrochromism
manganese dioxide
photothermal regulation
reversible electrodeposition
Journal
IF:
19
Papers:
3.4W
Citations:
32.1W