Continuously‐Tunable and Ultrawide‐Range Thermal Regulator Based on Superaligned Carbon Nanotube Aerogels for Dynamic Thermal Management of Batteries and Buildings

Efficient heat transfer control is highly demanded for dynamic thermal management of equipment and buildings especially when the environmental temperature dramatically changes. Thermal switches, the current approach of heat transfer control, suffer from the issues of low switching ratios below eight...

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Veröffentlicht in:Advanced functional materials 2024-05, Vol.34 (22), p.n/a
Hauptverfasser: Yu, Wei, Dai, Wenhua, Hong, Zixin, Li, Guoxian, Wang, Ziying, Meng, Chuizhou, Wang, Jiaping, Liu, Changhong, Guo, Shijie, Fan, Shoushan
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container_issue 22
container_start_page
container_title Advanced functional materials
container_volume 34
creator Yu, Wei
Dai, Wenhua
Hong, Zixin
Li, Guoxian
Wang, Ziying
Meng, Chuizhou
Wang, Jiaping
Liu, Changhong
Guo, Shijie
Fan, Shoushan
description Efficient heat transfer control is highly demanded for dynamic thermal management of equipment and buildings especially when the environmental temperature dramatically changes. Thermal switches, the current approach of heat transfer control, suffer from the issues of low switching ratios below eight and sharp state transition between “on” and “off”. Herein, a continuously‐tuned thermal regulator with an ultrahigh thermal‐conductivity change ratio of 43 based on superaligned carbon nanotube aerogel is reported, which works on the regulation of both thermal interfacial resistance and conduction pathways by compressive deformation‐induced microstructure evolution. This thermal regulator can stabilize the device temperature at 25 °C when the environmental temperature varies by 7 and 11 °C under the natural convection and forced convection conditions, respectively. Toward practical application, the thermal regulator with flexibility is wrapped around a cylindrical lithium‐ion battery to control the operation temperature within the optimal range of 20–40 °C for enhanced discharging performance even at an environmental temperature of −20 °C. Besides, by combining the thermal regulator with radiative cooling film, the house model temperature can be lowered by 2.7 °C during daytime and raised by 1.1 °C during nighttime compared with the bare one. This efficient thermal regulation approach offers an effective solution for practical thermal management. A continuously‐tuned and ultrawide‐range thermal regulator with an extremely high thermal‐conductivity change ratio of 43 based on the superaligned carbon nanotube aerogel is developed by compressive deformation‐induced heat conduction regulation. By adjusting the thermal resistance in a continuous way, the thermal regulator achieves efficient and dynamic thermal management of batteries and buildings at different environmental temperatures.
doi_str_mv 10.1002/adfm.202314021
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Thermal switches, the current approach of heat transfer control, suffer from the issues of low switching ratios below eight and sharp state transition between “on” and “off”. Herein, a continuously‐tuned thermal regulator with an ultrahigh thermal‐conductivity change ratio of 43 based on superaligned carbon nanotube aerogel is reported, which works on the regulation of both thermal interfacial resistance and conduction pathways by compressive deformation‐induced microstructure evolution. This thermal regulator can stabilize the device temperature at 25 °C when the environmental temperature varies by 7 and 11 °C under the natural convection and forced convection conditions, respectively. Toward practical application, the thermal regulator with flexibility is wrapped around a cylindrical lithium‐ion battery to control the operation temperature within the optimal range of 20–40 °C for enhanced discharging performance even at an environmental temperature of −20 °C. Besides, by combining the thermal regulator with radiative cooling film, the house model temperature can be lowered by 2.7 °C during daytime and raised by 1.1 °C during nighttime compared with the bare one. This efficient thermal regulation approach offers an effective solution for practical thermal management. A continuously‐tuned and ultrawide‐range thermal regulator with an extremely high thermal‐conductivity change ratio of 43 based on the superaligned carbon nanotube aerogel is developed by compressive deformation‐induced heat conduction regulation. 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Besides, by combining the thermal regulator with radiative cooling film, the house model temperature can be lowered by 2.7 °C during daytime and raised by 1.1 °C during nighttime compared with the bare one. This efficient thermal regulation approach offers an effective solution for practical thermal management. A continuously‐tuned and ultrawide‐range thermal regulator with an extremely high thermal‐conductivity change ratio of 43 based on the superaligned carbon nanotube aerogel is developed by compressive deformation‐induced heat conduction regulation. 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subjects Aerogels
Buildings
Carbon nanotubes
CNT aerogel
Control equipment
dynamic thermal management
Forced convection
Free convection
Heat transfer
heat transfer control
Lithium-ion batteries
lithium‐ion battery
radiative cooling
Thermal management
Thermal resistance
title Continuously‐Tunable and Ultrawide‐Range Thermal Regulator Based on Superaligned Carbon Nanotube Aerogels for Dynamic Thermal Management of Batteries and Buildings
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