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The Role of H-bonding in Phase Change Materials

preprint
submitted on 19.11.2019, 00:54 and posted on 27.11.2019, 21:11 by Karolina Matuszek, R. Vijayaraghavan, Mega Kar, Douglas Macfarlane
Phase change materials (PCMs) which melt in the temperature range of 100-230 °C, are a promising alternative for the storage of thermal energy. In this range, large amounts of energy available from solar-thermal, or other forms of renewable heat, can be stored and applied to domestic or industrial processes, or to an Organic Rankine Cycle (ORC) engine to generate electricity. The amount of energy absorbed is related to the latent heat of fusion (ΔHf) and is often connected to the extent of hydrogen bonding in the PCM. Herein, we report fundamental studies, including crystal structure and Hirshfeld surface analysis, of a family of guanidinium organic salts that exhibit high values of ΔHf, demonstrating that the presence and strength of H-bonds between ions plays a key role in this property.

Funding

Army Research Laboratory

History

Email Address of Submitting Author

karolina.matuszek@monash.edu

Institution

Monash University

Country

Australia

ORCID For Submitting Author

0000-0001-8979-5927

Declaration of Conflict of Interest

no conflict of interest

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