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首页> 外文期刊>Advanced energy materials >Liquid Norbornadiene Photoswitches for Solar Energy Storage
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Liquid Norbornadiene Photoswitches for Solar Energy Storage

机译：液态降冰片二烯光电开关，用于太阳能存储

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摘要

Due to high global energy demands, there is a great need for development of technologies for exploiting and storing solar energy. Closed cycle systems for storage of solar energy have been suggested, based on absorption of photons in photoresponsive molecules, followed by on-demand release of thermal energy. These materials are called solar thermal fuels (STFs) or molecular solar thermal (MOST) energy storage systems. To achieve high energy densities, ideal MOST systems are required either in solid or liquid forms. In the case of the latter, neat high performing liquid materials have not been demonstrated to date. Here is presented a set of neat liquid norbornadiene derivatives for MOST applications and their characterization in toluene solutions and neat samples. Their synthesis is in most cases based on solvent-free Diels-Alder reactions, which easily and efficiently afford a range of compounds. The shear viscosity of the obtained molecules is close to that of colza oil, and they can absorb up to 10% of the solar spectrum with a measured energy storage density of up to 577 kJ/kg corresponding to 152 kJ mol(-1) (calculated 100 kJ mol(-1)). These findings pave the way towards implementation of liquid norbornadienes in closed cycle energy storage technologies.
机译：由于全球能源需求很高，因此非常需要开发用于开发和存储太阳能的技术。基于光响应分子中光子的吸收，然后按需释放热能，已经提出了用于存储太阳能的封闭循环系统。这些材料称为太阳能热燃料（STF）或分子太阳能热（MOST）能量存储系统。为了获得高能量密度，需要固态或液态形式的理想MOST系统。在后者的情况下，迄今为止尚未展示出纯净的高性能液体材料。这里介绍了一组用于MOST应用的纯净液态降冰片二烯衍生物，及其在甲苯溶液和纯净样品中的表征。在大多数情况下，它们的合成是基于无溶剂的Diels-Alder反应，该反应容易而有效地提供了一系列化合物。所得分子的剪切粘度接近菜子油的剪切粘度，它们可以吸收高达10％的太阳光谱，测得的能量存储密度高达577 kJ / kg，相当于152 kJ mol（-1）（计算出100 kJ mol（-1））。这些发现为在闭环储能技术中实施液态降冰片二烯铺平了道路。

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