Reversible colossal barocaloric effects near room temperature in 1-X-adamantane (X=Cl, Br) plastic crystals
AZNAR, Araceli
Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
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Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
AZNAR, Araceli
Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
BARRIO, María
Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
TAMARIT, Josep-Lluís
Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
LLOVERAS, Pol
Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
< Leer menos
Universitat Politècnica de Catalunya = Université polytechnique de Catalogne [Barcelona] [UPC]
Idioma
en
Article de revue
Este ítem está publicado en
Applied Materials Today. 2021, vol. 23, p. 101023
Elsevier
Resumen en inglés
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 ...Leer más >
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.< Leer menos
Palabras clave en inglés
Barocaloric effects
plastic crystals
1-bromoadamantane
1-chloroadamantane
pressure
entropy
Orígen
Importado de HalCentros de investigación