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- Title
Giant adiabatic temperature change and its direct measurement of a barocaloric effect in a charge-transfer solid.
- Authors
Ohkoshi, Shin-ichi; Nakagawa, Kosuke; Yoshikiyo, Marie; Namai, Asuka; Imoto, Kenta; Nagane, Yugo; Jia, Fangda; Stefanczyk, Olaf; Tokoro, Hiroko; Wang, Junhao; Sugahara, Takeshi; Chiba, Kouji; Motodohi, Kazuhiko; Isogai, Kazuo; Nishioka, Koki; Momiki, Takashi; Hatano, Ryu
- Abstract
Solid refrigerants exhibiting a caloric effect upon applying external stimuli are receiving attention as one of the next-generation refrigeration technologies. Herein, we report a new inorganic refrigerant, rubidium cyano-bridged manganese–iron–cobalt ternary metal assembly (cyano-RbMnFeCo). Cyano-RbMnFeCo shows a reversible barocaloric effect with large reversible adiabatic temperature changes of 74 K (from 57 °C to −17 °C) at 340 MPa, and 85 K (from 88 °C to 3 °C) at 560 MPa. Such large reversible adiabatic temperature changes have yet to be reported among caloric effects in solid–solid phase transition refrigerants. The reversible refrigerant capacity is 26000 J kg−1 and the temperature window is 142 K. Additionally, cyano-RbMnFeCo shows barocaloric effects even at low pressures, e.g., reversible adiabatic temperature change is 21 K at 90 MPa. Furthermore, direct measurement of the temperature change using a thermocouple shows +44 K by applying pressure. The temperature increase and decrease upon pressure application and release are repeated over 100 cycles without any degradation of the performance. This material series also possesses a high thermal conductivity value of 20.4 W m−1 K−1. The present barocaloric material may realize a high-efficiency solid refrigerant. Cyano-RbMnFeCo shows a large barocaloric effect with reversible adiabatic temperature changes of 74 K (340 MPa) and 85 K (560 MPa). Here, the authors observe temperature change of +44 K (440 MPa), stable after repeating over 100 times.
- Subjects
ADIABATIC temperature; REFRIGERANTS; PHASE transitions; PYROELECTRICITY; THERMAL conductivity; TEMPERATURE measurements; RUBIDIUM
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-44350-4