Experimental investigation shows improved thermal storage stability in calcium-based materials, suggesting better efficiency for solar thermal applications.
In calcium cycle (CaO/CaCO 3 )‐driven thermochemical energy storage systems, the thermal storage capacity of calcium‐based materials decreases significantly during cycling, which is mainly attributed to high‐temperature sintering and pore structure degradation. To address the aforementioned issues, this study synthesized acetic acid‐modified Al 2 O 3 /MgO synergistically stabilized calcium‐based thermal storage materials (Ca/Mg/Al molar ratios = 100:8:8, 100:8:10, 100:8:12, 100:8:14) via a wet blending method and investigated the effects of Al 2 O 3 /MgO doping ratios on the thermal storage performance. Results demonstrated that the optimal molar ratio of Ca:Mg:Al = 100:8:12 (labeled Ca 100 ‐Mg 8 ‐Al 12 ) exhibits a 90.81% improvement in cyclic stability of thermal storage compared to the unmodified Ca 100 sample. Microstructural characterization revealed that the calcium‐based synthetic material possessed abundant micropores, smaller particle sizes, and a more uniform particle size distribution. The calcium‐based synthetic material holds significant potential for broad applications in thermochemical energy storage systems.
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Liu et al. (2026) studied this question.
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