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Peer-reviewedCC BY-NC-NDNature communications

Colossal and fully reversible barocaloric effect for sustainable cooling in a pressure-sensitive spin-crossover complex.

  • Yue Kan1,2
  • Shuo Meng3
  • Si-Wei Yan1,2
  • Rui-Xin Li4
  • Qing-Zhen Huang5,6
  • Yue-Xing Zhang7
  • Yang Ren8
  • Zi-Long Zhao9
  • Ivan da Silva10
  • Li-Jin Wang11
  • Chang-Qing Jin1,2
  • Zheng-Ying Tian1,2
11 more authors
  • Han Liang3
  • Yuan-Sha Chen1,2
  • Quan-Jun Li4
  • Jing Wang12,13
  • Yun-Zhong Chen1,2
  • Dao-Peng Zhang14
  • Jia Yan Law15
  • Victorino Franco15
  • Oliver Gutfleisch16
  • Feng-Xia Hu17,18
  • Bao-Gen Shen19,20,21,22
22 affiliations
  1. 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, PR China.
  2. 2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, PR China.
  3. 3College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, PR China.
  4. 4State Key Laboratory of Superhard Materials, International Centre of Future Science, Jilin University, Changchun, PR China.
  5. 5Songshan Lake Materials Laboratory, Dongguan, Guangdong, PR China.
  6. 6Spallation Neutron Source Science Center, Dongguan, PR China.
  7. 7Shandong Provincial Key Laboratory of Monocrystalline Silicon semiconductor Materials and Technology, College of chemistry and chemical engineering, Dezhou University, Dezhou, China.
  8. 8Department of Physics, JC STEM Lab of Energy and Materials Physics, City University of Hong Kong, Hong Kong, China.
  9. 9Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, PR China.
  10. 10ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, UK.
  11. 11Institute of Advanced Materials and Technology, University of Science and Technology, Beijing, PR China.
  12. 12Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, PR China. [email protected].
  13. 13School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, PR China. [email protected].
  14. 14College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, PR China. [email protected].
  15. 15Multidisciplinary Unit for Energy Science, Dpto. Física de la Materia Condensada, Universidad de Sevilla, Sevilla, Spain.
  16. 16Institute of Materials Science, Technical University of Darmstadt, Darmstadt, Germany.
  17. 17Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, PR China. [email protected].
  18. 18School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, PR China. [email protected].
  19. 19Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, PR China. [email protected].
  20. 20School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, PR China. [email protected].
  21. 21Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, China. [email protected].
  22. 22Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, China. [email protected].
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Abstract

Barocaloric refrigeration has great potential to replace traditional vapor-compression systems, which are conspicuously harmful to the environment. Investigating barocaloric effect driven by a practical pressure remains challenging. Here, we report that the spin-crossover (SCO) complex Fe(PC4HH)₂ (PC4HH = 4-hydroxy-N'-((pyridin-2-yl)-methylene)-benzohydrazide) exhibits a colossal and reversible barocaloric entropy change (ΔSr, up to ~125 J·K⁻¹·kg⁻¹) under a small pressure ∼7.5 MPa owing to the extremely high pressure sensitivity of transition temperature (dTc/dP, 5.56 K/MPa). Synchrotron radiation PXRD demonstrate that the source of the enhanced ΔSr and the ultra-large dTc/dP come from the gas (air) adsorption of pressure transimitting medium. The superior pressure sensitivity and outstanding barocaloric performance provide a feasible way to exploit novel barocaloric materials by utilizing the complexation properties of SCO materials with gas.

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Cite

BibTeXRIS
BibTeX
@article{kan2026colossal,
  title = {{Colossal and fully reversible barocaloric effect for sustainable cooling in a pressure-sensitive spin-crossover complex.}},
  author = {Yue Kan and Shuo Meng and Si-Wei Yan and Rui-Xin Li and Qing-Zhen Huang and Yue-Xing Zhang and Yang Ren and Zi-Long Zhao and Ivan da Silva and Li-Jin Wang and Chang-Qing Jin and Zheng-Ying Tian and Han Liang and Yuan-Sha Chen and Quan-Jun Li and Jing Wang and Yun-Zhong Chen and Dao-Peng Zhang and Jia Yan Law and Victorino Franco and Oliver Gutfleisch and Feng-Xia Hu and Bao-Gen Shen},
  journal = {Nature communications},
  year = {2026},
  month = sep,
  doi = {10.1038/s41467-026-77679-7},
  url = {https://europepmc.org/article/MED/42875452},
  note = {CC BY-NC-ND},
}
RIS
TY  - JOUR
TI  - Colossal and fully reversible barocaloric effect for sustainable cooling in a pressure-sensitive spin-crossover complex.
AU  - Yue Kan
AU  - Shuo Meng
AU  - Si-Wei Yan
AU  - Rui-Xin Li
AU  - Qing-Zhen Huang
AU  - Yue-Xing Zhang
AU  - Yang Ren
AU  - Zi-Long Zhao
AU  - Ivan da Silva
AU  - Li-Jin Wang
AU  - Chang-Qing Jin
AU  - Zheng-Ying Tian
AU  - Han Liang
AU  - Yuan-Sha Chen
AU  - Quan-Jun Li
AU  - Jing Wang
AU  - Yun-Zhong Chen
AU  - Dao-Peng Zhang
AU  - Jia Yan Law
AU  - Victorino Franco
AU  - Oliver Gutfleisch
AU  - Feng-Xia Hu
AU  - Bao-Gen Shen
PY  - 2026
DA  - 2026/09/15
JO  - Nature communications
DO  - 10.1038/s41467-026-77679-7
UR  - https://europepmc.org/article/MED/42875452
AB  - Barocaloric refrigeration has great potential to replace traditional vapor-compression systems, which are conspicuously harmful to the environment. Investigating barocaloric effect driven by a practical pressure remains challenging. Here, we report that the spin-crossover (SCO) complex Fe(PC4HH)₂ (PC4HH = 4-hydroxy-N'-((pyridin-2-yl)-methylene)-benzohydrazide) exhibits a colossal and reversible barocaloric entropy change (ΔSr, up to ~125 J·K⁻¹·kg⁻¹) under a small pressure ∼7.5 MPa owing to the extremely high pressure sensitivity of transition temperature (dTc/dP, 5.56 K/MPa). Synchrotron radiation PXRD demonstrate that the source of the enhanced ΔSr and the ultra-large dTc/dP come from the gas (air) adsorption of pressure transimitting medium. The superior pressure sensitivity and outstanding barocaloric performance provide a feasible way to exploit novel barocaloric materials by utilizing the complexation properties of SCO materials with gas.
SN  - 2041-1723
ER  -