Maintaining stable temperatures is crucial for civilization,but it typically requires substantial energy consumption,contributing to significant carbon footprints.Despite advancements in passive heating/cooling techno...Maintaining stable temperatures is crucial for civilization,but it typically requires substantial energy consumption,contributing to significant carbon footprints.Despite advancements in passive heating/cooling technologies,achieving purely passive temperature regulation in volatile environments remains a challenge due to the temporal mismatch between heating/cooling demand and passive power supply.Here,we demonstrate a passive temperature regulator that balances the power demand and supply through a tailored sandwich structure,integrating the functionalities of harvesting,storage,and release of passive solar heat and space coldness.Outdoor experiments demonstrate that the regulator maintains a target temperature for 96%(71%)of the testing period in winter(summer).Compared to conventional solar absorbers(radiative coolers),the regulator saves 56%(30%)of energy across 31 cities worldwide in achieving stable temperatures.The regulator represents an important advancement in passive temperature regulation with minimized carbon footprint and shows attractive prospects both on Earth and in outer space.展开更多
Ionic skin(I-skin)is an emerging skin-inspired sensor that has received increasing interest for the next-generation wearable electronics.However,profound challenges for I-skin remain in achieving multiple signal respo...Ionic skin(I-skin)is an emerging skin-inspired sensor that has received increasing interest for the next-generation wearable electronics.However,profound challenges for I-skin remain in achieving multiple signal responses(e.g.,strain,pressure,and humidity)and self-healability to fully mimic human skin.Herein,a Fe;ion-coordinated poly(acrylic acid)ionogel(PAIFe)with high stretchability,extreme temperature tolerance,and self-healing capability is prepared by a dynamic ionic cross-linking strategy.The ionic coordination in the PAIFe contributes to the formation of a highly dynamic network,achieving its high-efficient and reliable self-healing performance even at a low temperature of-20℃.Using of 1-butyl-3-methylimidazolium tetrafluoroborate([BMIm][BF^(3+)])as the solvent achieves a widetemperature tolerance of the PAIFe under low and high temperatures.More interestingly,a humidity sensing function is realized in the PAIFe by skillfully utilizing the hygroscopic properties of[BMIm][BF_(4)].The resultant PAIFe is proof-ofconcept demonstrated as a deformation-tolerant ionic conductor in a skin-inspired ionic sensor,showing a variety of sensory capabilities towards compression,strain and humidity.展开更多
基金jointly supported by the National Key Research and Development Program of China(2022YFB3804902 and 2022YFA1404704)the National Natural Science Foundation of China(52322211,51925204,52102262,52003116,92262305,52372197 and 52381260325)the Natural Science Foundation of Jiangsu Province(BK20220035 and BK20200340).
文摘Maintaining stable temperatures is crucial for civilization,but it typically requires substantial energy consumption,contributing to significant carbon footprints.Despite advancements in passive heating/cooling technologies,achieving purely passive temperature regulation in volatile environments remains a challenge due to the temporal mismatch between heating/cooling demand and passive power supply.Here,we demonstrate a passive temperature regulator that balances the power demand and supply through a tailored sandwich structure,integrating the functionalities of harvesting,storage,and release of passive solar heat and space coldness.Outdoor experiments demonstrate that the regulator maintains a target temperature for 96%(71%)of the testing period in winter(summer).Compared to conventional solar absorbers(radiative coolers),the regulator saves 56%(30%)of energy across 31 cities worldwide in achieving stable temperatures.The regulator represents an important advancement in passive temperature regulation with minimized carbon footprint and shows attractive prospects both on Earth and in outer space.
基金financially supported by the National Natural Science Foundation of China(21875033 and 52122303)。
文摘Ionic skin(I-skin)is an emerging skin-inspired sensor that has received increasing interest for the next-generation wearable electronics.However,profound challenges for I-skin remain in achieving multiple signal responses(e.g.,strain,pressure,and humidity)and self-healability to fully mimic human skin.Herein,a Fe;ion-coordinated poly(acrylic acid)ionogel(PAIFe)with high stretchability,extreme temperature tolerance,and self-healing capability is prepared by a dynamic ionic cross-linking strategy.The ionic coordination in the PAIFe contributes to the formation of a highly dynamic network,achieving its high-efficient and reliable self-healing performance even at a low temperature of-20℃.Using of 1-butyl-3-methylimidazolium tetrafluoroborate([BMIm][BF^(3+)])as the solvent achieves a widetemperature tolerance of the PAIFe under low and high temperatures.More interestingly,a humidity sensing function is realized in the PAIFe by skillfully utilizing the hygroscopic properties of[BMIm][BF_(4)].The resultant PAIFe is proof-ofconcept demonstrated as a deformation-tolerant ionic conductor in a skin-inspired ionic sensor,showing a variety of sensory capabilities towards compression,strain and humidity.
