Structure and thermal properties relationships in the thermomaterial di-n-butylammonium tetrafluoroborate for multipurpose cooling and cold-storage

DOI: 10.1039/D3TA04063A

Authors: Javier Garcia Ben (Universidade da Coruña) , Juan Manuel Bermudez Garcia (Universidade da Coruña) , Richard J. C. Dixey (Queen Mary University of London) , Ignacio Delgado-Ferreiro (Universidade da Coruña) , Antonio L. Llamas-Saiz (University of Santiago de Compostela) , Jorge López-Beceiro (Universidade da Coruña) , Ramón Artiaga (Universidade da Coruña) , Alberto Garcia-Fernandez (University of Santiago de Compostela) , Ute B. Cappel (University of Santiago de Compostela) , Bruno Alonso (ICGM, CNRS, Université de Montpellier, ENSCM) , Socorro Castro-Garcia (Universidade da Coruña) , Anthony E. Phillips (Queen Mary University of London) , Manuel Sánchez-Andújar (Universidade da Coruña) , Maria Antonia Señarís-Rodríguez (Universidade da Coruña)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Materials Chemistry A

State: Published (Approved)
Published: September 2023
Diamond Proposal Number(s): 30448

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 present thermal properties of great interest not only for active barocaloric refrigeration, but also for passive cold-storage, which render this as a unique multipurpose thermomaterial. The observed cold-storage capacity is very close to 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 most barocaloric materials and 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 barocalorics. Beyond the thermal properties, we perform a deep structural characterization, which reveal a progressive structural disorder of the [DBA]+ cations and [BF4]- anions as the origin of such thermal properties, which will help towards future rational design of enhanced thermomaterials.

Subject Areas: Materials, Chemistry, Food Science


Instruments: I11-High Resolution Powder Diffraction

Added On: 27/09/2023 14:11

Documents:
d3ta04063a.pdf

Discipline Tags:

Chemistry Materials Science Inorganic Chemistry Food Science

Technical Tags:

Diffraction X-ray Powder Diffraction