Interfacial Coupling Boosts Giant Electrocaloric Effects in Relaxor Polymer Nanocomposites: In Situ Characterization and Phase-Field Simulation

Jianfeng Qian, Renci Peng, Zhonghui Shen, Jianyong Jiang, Fei Xue, Tiannan Yang, Long-qing Chen, Yang Shen

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The electrocaloric effect (ECE) refers to reversible thermal changes of a polarizable material upon the application or removal of electric fields. Without a compressor or cooling agents, all-solid-state electrocaloric (EC) refrigeration systems are environmentally benign, highly compact, and of very high energy efficiency. Relaxor ferroelectric ceramics and polymers are promising candidates as EC materials. Here, synergistic efforts are made by composing relaxor Ba(Zr 0.21 Ti 0.79 )O 3 nanofibers with P(VDF-TrFE-CFE) to make relaxor–relaxor-type polymer nanocomposites. The ECEs of the nanocomposites are directly measured and these relaxor nanocomposites exhibit, so far, the highest EC temperature change at a modest electric field, along with high thermal stability within a broad temperature range span to room temperature. The superior EC performance is attributed to the interfacial coupling between dipoles across the filler/polymer interfaces. The thermodynamics and kinetics of interfacial coupling are investigated in situ by piezoresponse force microscopy while the real-time evolution of interfacial coupling is simulated and visualized by phase-field modeling.

Original languageEnglish (US)
Article number1801949
JournalAdvanced Materials
Volume31
Issue number5
DOIs
StatePublished - Feb 1 2019

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Nanocomposites
Polymers
Electric fields
Ferroelectric ceramics
Refrigeration
Nanofibers
Temperature
Energy efficiency
Compressors
Fillers
Microscopic examination
Thermodynamic stability
Thermodynamics
Cooling
Kinetics
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Qian, Jianfeng ; Peng, Renci ; Shen, Zhonghui ; Jiang, Jianyong ; Xue, Fei ; Yang, Tiannan ; Chen, Long-qing ; Shen, Yang. / Interfacial Coupling Boosts Giant Electrocaloric Effects in Relaxor Polymer Nanocomposites : In Situ Characterization and Phase-Field Simulation. In: Advanced Materials. 2019 ; Vol. 31, No. 5.
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Interfacial Coupling Boosts Giant Electrocaloric Effects in Relaxor Polymer Nanocomposites : In Situ Characterization and Phase-Field Simulation. / Qian, Jianfeng; Peng, Renci; Shen, Zhonghui; Jiang, Jianyong; Xue, Fei; Yang, Tiannan; Chen, Long-qing; Shen, Yang.

In: Advanced Materials, Vol. 31, No. 5, 1801949, 01.02.2019.

Research output: Contribution to journalArticle

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AU - Yang, Tiannan

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