Multilayer Polypyrrole Nanosheets with Self-Organized Surface Structures for Flexible and Efficient Solar-Thermal Energy Conversion
Multilayer Polypyrrole Nanosheets with Self-Organized Surface Structures for Flexible and Efficient Solar-Thermal Energy Conversion
复制标题
具有自组织表面结构的多层聚吡咯纳米片可实现灵活高效的太阳能-热能转换
DOI：
10.1002/adma.201807716
复制
发表时间：
2019-05-10
影响因子：
29.4
通讯作者：
Xu, Hangxun
中科院分区：
文献类型：
--
作者：
Wang, Xu;Liu, Qingchang;Xu, Hangxun
将太阳能转换成集中的热量对于各种应用非常有吸引力。聚吡咯（PPy）具有优良的光热性能和低的热导率，是太阳能-热能转换的理想材料。然而，基于PPy或其他导电聚合物的太阳能热材料由于缺乏有效的光捕获方案而仍然表现出有限的能量转换效率。在这里，它表明，多层PPy纳米片与自发形成的表面结构，如皱纹和脊，通过顺序聚合在纸基板上可以显着提高整个太阳光谱的宽带和广角光吸收，导致令人印象深刻的太阳能热转换效率为95.33%。多层PPy纳米片的有趣的太阳热性质和结构特征可用于太阳能加热和光致动器。同时，当用于太阳能蒸汽发生器时，在一个太阳照射下，测量效率可以达到接近92%。分层多层结构具有机械灵活性和鲁棒性，具有实际太阳能利用的巨大潜力。这项研究提供了一种简单而直接的方法，将轻质和隔热的聚合物设计成高效的太阳能热材料，用于新兴的太阳能相关应用。
Converting solar energy into concentrated heat is very appealing for various applications. Polypyrrole (PPy) is known to possess excellent photothermal property with low thermal conductivity, and thus is an ideal candidate for solar-thermal energy conversion. However, solar-thermal materials based on PPy or other conducting polymers still exhibit limited energy conversion efficiency due to the lack of effective light-trapping schemes. Here, it is demonstrated that multilayer PPy nanosheets with spontaneously formed surface structures such as wrinkles and ridges via sequential polymerization on paper substrates can dramatically enhance broadband and wide-angle light absorption across the full solar spectrum, leading to an impressive solar-thermal conversion efficiency of 95.33%. The intriguing solar-thermal properties and structural features of multilayer PPy nanosheets can be used for solar heating and photoactuators. Meanwhile, when used for solar steam generation, the measured efficiency could achieve approximate to 92% under one sun irradiation. The hierarchically multilayer structure is mechanically flexible and robust, holding great potential for practical solar energy utilization. This study provides a simple and straightforward approach toward engineering light-weight and thermally insulating polymers into efficient solar-thermal materials for emerging solar energy-related applications.