Multi-entropy electrocaloric film induced by three-dimensional thermal conductive ceramic network for synergistic thermal management

Author:

Wang Fang1ORCID,Wu Wei-Long1ORCID,Wu Ming1ORCID,Zhou Dong-Shan1ORCID,Wang Xiao-Liang1ORCID,Shen Qun-Dong1ORCID

Affiliation:

1. Department of Polymer Science and Engineering, Key Laboratory of High-Performance Polymer Materials and Technology of MOE, State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering, Nanjing University , Nanjing 210023, People's Republic of China

Abstract

Imparting high thermal conductivity to electrocaloric refrigeration polymers is a promising solution for efficiently synergizing and accurately managing the vast heat generated by high-power density electronics. We employed a sacrificial template method to construct a three-dimensional thermally conductive SiOC ceramic network and embedded it in the electrocaloric polymer. The electrocaloric composite film with a 1 wt. % SiOC achieved a synergistic improvement in heat transfer and electrocaloric cooling, while the thermal diffusivity of the 10 wt. % composites increased sixfold. The three-dimensional ceramic network not only acted as a heat transfer pathway but also induced the transition of the electrocaloric polymer chain to a high-entropy state, increasing the number of dipole entities that could be driven by the electric field. The system reached a refrigeration temperature change of 2 K at a field strength of as low as 30 MV m−1. The high-entropy and high-crystallized electrocaloric composite film induced by the SiOC thermal conductive interface provides a tool for synergistic thermal management.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

State Key Laboratory of Analytical Chemistry for Life Science

Publisher

AIP Publishing

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