Bioinspired Intelligent Solar-Responsive Thermally Conductive Pyramidal Phase Change Composites with Radially Oriented Layered Structures toward Efficient Solar–Thermal–Electric Energy Conversion

Hao-Yu Zhao; Chao Shu; Xin WangPeng MinChangjun LiFu-Lin GaoXiaofeng LiZhong-Zhen Yu

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Bioinspired Intelligent Solar-Responsive Thermally Conductive Pyramidal Phase Change Composites with Radially Oriented Layered Structures toward Efficient Solar–Thermal–Electric Energy Conversion

机译：Bioinspired Intelligent Solar-Responsive Thermally Conductive Pyramidal Phase Change Composites with Radially Oriented Layered Structures toward Efficient Solar–Thermal–Electric Energy Conversion

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摘要

To remedy the drawbacks of weak solar-thermal conversion capability, lowthermal conductivity, and poor structural stability of phase change materials,pyramidal graphitized chitosan/graphene aerogels (G-CGAs) with numerousradially oriented layers are constructed, in which the long-range radial alignmentof graphene sheets is achieved by a novel directional-freezing strategy. AG-CGA/polyethylene glycol phase change composite exhibits a thermal conductivityof 2.90 W m~(?1) K~(?1) with a latent heat of 178.8 J g~(?1), and achieves a superiorsolar-thermal energy conversion and storage efficiency of 90.4% and an attractivemaximum temperature of 99.7 ℃ under a light intensity of 200 mW cm~(?2).Inspired by waterlilies, solar-responsive phase change composites (SPCCs)are designed for the first time by assembling the G-CGA/polyethylene glycolphase change composites with solar-driven bilayer films, which bloom byday and close by night. The heat preservation effect of the solar-driven filmsleads to a higher temperature of SPCC for a longer period at night. The SPCCbasedsolar–thermal–electric generator achieves output voltages of 499.2 and1034.9 mV under light intensities of 200 and 500 mW cm~(?2), respectively. Evenafter stopping the solar irradiation, the voltage output still occurs because ofthe latent heat release and the heat preservation of the films.

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来源
《Advanced functional materials》 |2023年第33期|2302527.1-2302527.13|共13页
作者
Hao-Yu Zhao; Chao Shu; Xin WangPeng MinChangjun LiFu-Lin GaoXiaofeng LiZhong-Zhen Yu;
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作者单位

State Key Laboratory of Organic-Inorganic CompositesCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029, China;

Beijing Key Laboratory of Advanced Functional Polymer CompositesBeijing University of Chemical TechnologyBeijing 100029, China;

State Key Laboratory of Organic-Inorganic CompositesCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029, China,Beijing Key Laboratory of Advanced Functional Polymer CompositesBeijing University of Chemical TechnologyBeijing 100029, China;

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正文语种英语
中图分类无线电电子学、电信技术;工程材料学;
关键词
polyethylene glycol; pyramidal graphene aerogels; solar-responsive phase change composites; solar–thermal–electric conversion; thermal conductivity;

Bioinspired Intelligent Solar-Responsive Thermally Conductive Pyramidal Phase Change Composites with Radially Oriented Layered Structures toward Efficient Solar–Thermal–Electric Energy Conversion

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