Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 32, 2020
Previous Article Next Article

The strong electrocaloric effect in molecular ferroelectric ImClO4 with ultrahigh electrocaloric strength

Author affiliations

Abstract

The electrocaloric effect (ECE) provides a new approach to realize environment friendly cooling with high efficiency. Although a giant ECE has been achieved in ferroelectrics, the relatively low EC strength forces conventional EC materials to be operated with very high electric fields, increasing insurmountable obstacles for pushing the ECE to become practical. Here, we reveal an extremely high EC strength (3.6 J mm K−1 kg−1 kV−1 and 0.84 K mm kV−1) in molecular ferroelectric imidazolium perchlorate (ImClO4), which is ∼13 times higher than those of the ferroelectric polymers, and also significantly exceeds those of typical inorganic displacive type ferroelectrics. The superior EC strength is attributable to the unique polarization mechanism arising from the order–disorder behavior of molecular ferroelectric ImClO4 that is completely different from conventional ferroelectrics, which is rationalized by the thermodynamic modeling. As a result, changes of entropy and temperature of 5.4 J kg−1 K−1 and 1.26 K can be attained in ImClO4 with a low electric field of 1.5 kV mm−1. This work suggests a new promising family of ferroelectrics for high-performance solid-state EC cooling.

Graphical abstract: The strong electrocaloric effect in molecular ferroelectric ImClO4 with ultrahigh electrocaloric strength

Back to tab navigation

Supplementary files

Article information


Submitted
20 May 2020
Accepted
14 Jul 2020
First published
16 Jul 2020

J. Mater. Chem. A, 2020,8, 16189-16194
Article type
Communication

The strong electrocaloric effect in molecular ferroelectric ImClO4 with ultrahigh electrocaloric strength

W. Li, H. M. Jafri, C. Zhang, Y. Zhang, H. Zhang, H. Huang, S. Jiang and G. Zhang, J. Mater. Chem. A, 2020, 8, 16189
DOI: 10.1039/D0TA05154C

Social activity

Search articles by author

Spotlight

Advertisements