KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
Sci Adv. 2023 Feb 3;9(5):eadf5883. doi: 10.1126/sciadv.adf5883. Epub 2023 Feb 1.
Recent advances in passive radiative cooling systems describe a variety of strategies to enhance cooling efficiency, while the integration of such technology with a bioinspired design using biodegradable materials can offer a research opportunity to generate energy in a sustainable manner, favorable for the temperature/climate system of the planet. Here, we introduce stretchable and ecoresorbable radiative cooling/heating systems engineered with zebra stripe-like patterns that enable the generation of a large in-plane temperature gradient for thermoelectric generation. A comprehensive study of materials with theoretical evaluations validates the ability to accomplish the target performances even under external mechanical strains, while all systems eventually disappear under physiological conditions. Use of the zebra print for selective radiative heating demonstrates an unexpected level of temperature difference compared to use of radiative cooling emitters alone, which enables producing energy through resorbable silicon-based thermoelectric devices. The overall result suggests the potential of scalable, ecofriendly renewable energy systems.
近年来被动辐射冷却系统的进展描述了多种提高冷却效率的策略，而将这项技术与使用可生物降解材料的仿生设计相结合，可以为以可持续方式产生能源提供研究机会，有利于地球的温度/气候系统。在这里，我们介绍了具有斑马条纹图案的可拉伸和生态可吸收辐射冷却/加热系统，这些系统能够产生大的面内温度梯度，用于热电发电。对具有理论评估的材料进行的综合研究验证了即使在外部机械应变下也能实现目标性能的能力，而所有系统最终都会在生理条件下消失。与单独使用辐射冷却发射器相比，斑马纹用于选择性辐射加热的效果出乎意料，这使得通过可吸收的硅基热电设备产生能量成为可能。整体结果表明了可扩展的、环保的可再生能源系统的潜力。
