TY - JOUR
T1 - Dynamic electrochromism for all-season radiative thermoregulation
AU - Sui, Chenxi
AU - Pu, Jiankun
AU - Chen, Ting Hsuan
AU - Liang, Jiawei
AU - Lai, Yi Ting
AU - Rao, Yunfei
AU - Wu, Ronghui
AU - Han, Yu
AU - Wang, Keyu
AU - Li, Xiuqiang
AU - Viswanathan, Venkatasubramanian
AU - Hsu, Po Chun
N1 - Generated from Scopus record by KAUST IRTS on 2023-09-21
PY - 2023/4/1
Y1 - 2023/4/1
N2 - 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.
AB - 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.
UR - https://www.nature.com/articles/s41893-022-01023-2
UR - http://www.scopus.com/inward/record.url?scp=85146876623&partnerID=8YFLogxK
U2 - 10.1038/s41893-022-01023-2
DO - 10.1038/s41893-022-01023-2
M3 - Article
SN - 2398-9629
VL - 6
SP - 428
EP - 437
JO - Nature Sustainability
JF - Nature Sustainability
IS - 4
ER -