Shangguan Zhichun, Sun Wenjin, Zhang Zhao-Yang, Fang Dong, Wang Zhihang, Wu Si, Deng Chao, Huang Xianhui, He Yixin, Wang Ruzhu, Li Tingxian, Moth-Poulsen Kasper, Li Tao
School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Key Laboratory of Thin Film and Microfabrication, Ministry of Education, Shanghai Jiao Tong University Shanghai 200240 China
Department of Chemistry and Chemical Engineering, Chalmers University of Technology Gothenburg 41296 Sweden
Chem Sci. 2022 May 16;13(23):6950-6958. doi: 10.1039/d2sc01873j. eCollection 2022 Jun 15.
An optimal temperature is crucial for a broad range of applications, from chemical transformations, electronics, and human comfort, to energy production and our whole planet. Photochemical molecular thermal energy storage systems coupled with phase change behavior (MOST-PCMs) offer unique opportunities to capture energy and regulate temperature. Here, we demonstrate how a series of visible-light-responsive azopyrazoles couple MOST and PCMs to provide energy capture and release below 0 °C. The system is charged by blue light at -1 °C, and discharges energy in the form of heat under green light irradiation. High energy density (0.25 MJ kg) is realized through co-harvesting visible-light energy and thermal energy from the environment through phase transitions. Coatings on glass with photo-controlled transparency are prepared as a demonstration of thermal regulation. The temperature difference between the coatings and the ice cold surroundings is up to 22.7 °C during the discharging process. This study illustrates molecular design principles that pave the way for MOST-PCMs that can store natural sunlight energy and ambient heat over a wide temperature range.
最佳温度对于广泛的应用至关重要，从化学转化、电子学、人体舒适度到能源生产以及我们的整个星球。结合相变行为的光化学分子热能存储系统（MOST-PCM）为捕获能量和调节温度提供了独特的机会。在此，我们展示了一系列可见光响应性偶氮吡唑如何将MOST和PCM结合起来，以在低于0°C的温度下实现能量捕获和释放。该系统在-1°C下由蓝光充电，并在绿光照射下以热的形式释放能量。通过从环境中共同收集可见光能量和通过相变产生的热能，实现了高能量密度（0.25 MJ kg）。制备了具有光控透明度的玻璃涂层，作为热调节的示范。在放电过程中，涂层与冰冷周围环境之间的温差高达22.7°C。这项研究阐述了分子设计原理，为能够在宽温度范围内存储自然阳光能量和环境热量的MOST-PCM铺平了道路。
