Thermochemical heat storage (THS) systems have recently attracted a lot of attention in research and development. In this study, an anodic aluminum oxide (AAO) template, fabricated by a two-step anodization method, was used for the first time as the matrix material for a THS system. Different salts were studied as thermochemical materials for their suitability in low-grade heat storage application driven by solar energy for an open system. Compositions were prepared by absorbing CaCl₂, MgCl₂, LiCl, LiNO₃ and mixtures of these salts under a vacuum in an AAO matrix. Field Emission Scanning Electron Microscopy was used to examine the morphology of the produced AAO composites. Thermal energy storage capacities of the composites were characterized using a differential scanning calorimeter. Characterization analysis showed that anodized Al plates were suitable matrix materials for THS systems, and composite sorbent prepared with a 1:1 ratio LiCl/LiNO₃ salt mixture had the highest energy value among all composites, with an energy density of 468.1 kJ·kg⁻¹.

中文翻译：

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低级蓄热盐浸阳极氧化铝复合材料的合成与表征

热化学储热（THS）系统最近在研究和开发中引起了很多关注。在这项研究中，通过两步阳极氧化方法制造的阳极氧化铝（AAO）模板首次用作THS系统的基质材料。研究了各种盐作为热化学材料的适用性，以适应在开放系统中由太阳能驱动的低级储热应用中的适用性。通过吸收CaCl ₂，MgCl ₂，LiCl，LiNO ₃制备组合物和这些盐的混合物在真空下在AAO基质中。使用场发射扫描电子显微镜检查所产生的AAO复合材料的形态。使用差示扫描量热仪表征了复合材料的储热能力。表征分析表明，阳极化的Al板均适宜的基质材料THS系统，和复合吸附剂具有1制备：1倍的比例的LiCl /的LiNO ₃盐的混合物具有的所有复合材料中具有最高的能量值，与468.1千焦·kg的能量密度^{- 1}。