García Ben, JavierBermúdez-García, Juan ManuelDelgado Ferreiro, IgnacioLópez-Beceiro, JorgeArtiaga, RamónGarcía-Fernández, AlbertoCastro-García, SocorroSánchez-Andújar, ManuelSeñarís-Rodríguez, M. A.2024-07-082024-07-082023-11-07J. García-Ben, J. M. Bermúdez-García, R. J. C. Dixey, I. Delgado-Ferreiro, A. L. Llamas-Saiz, J. López-Beceiro, R. Artiaga, A. García-Fernández, U. B. Cappel, B. Alonso, S. Castro-García, A. E. Phillips, M. Sánchez-Andújar and M. A. Señarís-Rodríguez, J. Mater. Chem. A, 2023, 11, 22232 DOI: 10.1039/D3TA04063A2050-7496http://hdl.handle.net/2183/37801[Abstract] Nowadays around 46% of food production around the world requires refrigeration, which is generally provided either by active vapour-compression (based on refrigerants with liquid–gas transitions) or passive cold-storage (based on solid-to-liquid phase change materials, SL-PCMs). However, in order to avoid fluid losses during the transitions, new thermomaterials with solid–solid transitions are desired for both applications. In this work, we find that [DBA][BF4] (DBA = di-n-butylammonium) is a promising thermomaterial with solid–solid phase transitions. This compound presents thermal properties of great interest not only for active barocaloric refrigeration, but also for passive cold-storage, which make this a unique multipurpose thermomaterial. The observed cold-storage capacity is very close to that of commercial SL-PCMs (E ∼ 135 kJ kg−1), while the pressure-induced thermal changes (ΔS ∼ [200–270] J K−1 kg−1) are superior to those of most barocaloric materials, operating under lower pressures (p ∼ [500–1000] bar). Moreover, the operating temperature range of this material is very adequate for food preservation (250–310 K), which is a great advantage over most barocaloric materials. Beyond the thermal properties, we perform deep structural characterization, which reveals a progressive structural disorder of the [DBA]+ cations and [BF4]− anions as the origin of such thermal properties, which will help the future rational design of enhanced thermomaterials.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/es/journal articleopen access10.1039/D3TA04063A