A colossal barocaloric effect induced by the creation of a high-pressure phase

As a promising environment-friendly alternative to current vapor-compression refrigeration, solid-state refrigeration based on the barocaloric effect has been attracting worldwide attention. Generally, both phases in which a barocaloric effect occurs are present at ambient pressure. Here, instead, we demonstrate that KPF6 exhibits a colossal barocaloric effect due to the creation of a high-pressure rhombohedral phase. The phase diagram is constructed based on pressure-dependent calorimetric, Raman scattering, and neutron diffraction measurements. The present study is expected to provide an alternative routine to colossal barocaloric effects through the creation of a high-pressure phase. © Royal Society of Chemistry 2024.

Keywords

Environment, Refrigeration, Phase diagrams, Calorimetry, Raman spectroscopy, Neutron diffraction, Scattering, Refrigeration, Pressure range, Organic compounds, Inorganic compounds

Citation

Zhang, Z., Jiang, X., Hattori, T., Xu, X., Li, M., Yu, C., Zhang, Z., Yu, D., Mole, R., Yano, S.-i., Chen, J., He, L., Wang, C.-W., Wang, H., Li, B., & Zhang, Z. (2023). A colossal barocaloric effect induced by the creation of a high-pressure phase. Materials Horizons, 10(3), 977-982. doi:10.1039/D2MH00905F