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Title: | Reversible colossal barocaloric effects near room temperature in 1-X-adamantane (X=Cl, Br) plastic crystals |
Author: | Aznar, Araceli Negrier, Philippe Planes Vila, Antoni Mañosa, Lluís Stern Taulats, Enric Moya, Xavier Barrio, María Tamarit, Josep Lluís Lloveras, Pol |
Keywords: | Cristalls moleculars Ciència dels materials Histèresi Molecular crystals Materials science Hysteresis |
Issue Date: | Mar-2021 |
Publisher: | Elsevier |
Abstract: | Plastic crystals undergo phase transitions with unusually large volume and entropy changes related to strong molecular orientational disordering. These features have led to a resurgent interest in these materials because recently they have shown great potential in solid-state cooling applications driven by pressure. Here we demonstrate that two plastic crystals derived from adamantane -1-Br-adamantane and 1-Cl-adamantane- undergo colossal reversible barocaloric effects under moderate pressure changes in a wide temperature span near room temperature thanks to a relatively small hysteresis and very high sensitivity of the transition temperature to pressure. In particular, 1-Cl-adamantane displays an optimal operational temperature range covering from ~40 K below and up to room temperature, and under a pressure change of 1 kbar this compound outperforms any other barocaloric material known so far. Our work gives strong support to plastic crystals as best candidates for barocaloric cooling. We also provide insight into the physical origin of the entropy changes through the analysis of the disorder on the involved phases. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.apmt.2021.101023 |
It is part of: | Applied Materials Today, 2021, vol. 23, p. 101023 |
URI: | http://hdl.handle.net/2445/192130 |
Related resource: | https://doi.org/10.1016/j.apmt.2021.101023 |
ISSN: | 2352-9407 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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