Journal
CHEMICAL REVIEWS
Volume 123, Issue 1, Pages 491-514Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemrev.2c00407
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Thermal energy storage technologies utilizing phase change materials can mitigate the intermittency issues of wind and solar energy by storing energy in the form of heat. However, the lack of practical phase change materials due to stability and safety concerns remains a major challenge.
Thermal energy storage technologies utilizing phase change materials (PCMs) that melt in the intermediate temperature range, between 100 and 220 degrees C, have the potential to mitigate the intermittency issues of wind and solar energy. This technology can take thermal or electrical energy from renewable sources and store it in the form of heat. This is of particular utility when the end use of the energy is also as heat. For this purpose, the material should have a phase change between 100 and 220 degrees C with a high latent heat of fusion. Although a range of PCMs are known for this temperature range, many of these materials are not practically viable for stability and safety reasons, a perspective not often clear in the primary literature. This review examines the recent development of thermal energy storage materials for application with renewables, the different material classes, their physicochemical properties, and the chemical structural origins of their advantageous thermal properties. Perspectives on further research directions needed to reach the goal of large scale, highly efficient, inexpensive, and reliable intermediate temperature thermal energy storage technologies are also presented.
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