Huang Hao, Shi Tongyu, He Rui, Wang Jiahong, Chu Paul K, Yu Xue-Feng
Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 P. R. China.
University of Chinese Academy of Sciences Beijing 100049 P. R. China.
Adv Sci (Weinh). 2020 Oct 22;7(23):2000602. doi: 10.1002/advs.202000602. eCollection 2020 Dec.
A new solar energy storage system is designed and synthesized based on phase-changing microcapsules incorporated with black phosphorus sheets (BPs). BPs are 2D materials with broad light absorption and high photothermal performance, which are synthesized and covalently modified with poly(methyl methacrylate) (PMMA) to produce the PMMA-modified BPs (mBPs). With the aid of PMMA, the mBPs and phase-changing materials (PCM, eicosane) are encapsulated together to form microcapsules. The microencapsulated eicosane and mBPs (mBPs-MPCM) composites exhibit a high latent heat of over 180 kJ kg, good thermal reliability, as well as excellent photothermal characteristics inherited from BPs. Owing to the direct contact in the integrated mBPs-MPCM composites, the thermal energy generated by mBPs is transferred to eicosane immediately giving rise to three times higher efficiency in solar energy storage compared to microcapsules with mBPs on the surface. The mBPs-MPCM composites have great potential in solar energy storage applications and the concept of integrating photothermal materials and PCMs as the core provides insights into the design of high-efficiency solar energy storage materials.
基于结合了黑磷片（BPs）的相变微胶囊，设计并合成了一种新型太阳能存储系统。黑磷是具有广泛光吸收和高光热性能的二维材料，通过聚甲基丙烯酸甲酯（PMMA）进行合成和共价改性，以制备PMMA改性的黑磷（mBPs）。借助PMMA，将mBPs与相变材料（PCM，二十烷）一起封装形成微胶囊。微胶囊化的二十烷和mBPs（mBPs-MPCM）复合材料表现出超过180 kJ kg的高潜热、良好的热可靠性以及从黑磷继承而来的优异光热特性。由于在集成的mBPs-MPCM复合材料中直接接触，mBPs产生的热能立即传递给二十烷，与表面带有mBPs的微胶囊相比，太阳能存储效率提高了三倍。mBPs-MPCM复合材料在太阳能存储应用中具有巨大潜力，并且将光热材料和PCM集成作为核心的概念为高效太阳能存储材料的设计提供了思路。
