Dual-responsive Flexible Dielectric Switching Composites for Overheating Warning and Small Deformation Monitoring

Chuan-Yu Jiang; Hai-Rong Li; Yu Peng; Liu-Yang Zhang; Wu-Hou Fan; Luo-Xin Wang; Ming Jiang; Zi-Qing Cai; Li-Jie Dong

doi:10.1007/s10118-025-3386-7

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Dual-responsive Flexible Dielectric Switching Composites for Overheating Warning and Small Deformation Monitoring

RESEARCH ARTICLE | Updated：2025-09-26

- Dual-responsive Flexible Dielectric Switching Composites for Overheating Warning and Small Deformation Monitoring
- Chinese Journal of Polymer Science Vol. 43, Issue 10, Pages: 1885-1893(2025)
- Affiliations：
  
  a.State Key Laboratory for New Textile Materials & Advanced Processing Technology, School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, China
  b.Mechanical Metrology Division, Hubei Institute of Measurement and Testing Technology, Wuhan 430223, China
  c.High-Tech Organic Fibers and Composite Materials Key Laboratory of Sichuan Province, Sichuan Textile Science Research Institute Co., Ltd., Chengdu 610065, China
  d.Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Wuhan Institute of Technology, Wuhan 430205, China
  e.School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
- Author bio：
  
  mjiang@wtu.edu.cn (M.J.)
  21011202@wit.edu.cn (Z.Q.C.)
  dong@whut.edu.cn (L.J.D.)
- Funds：
- DOI：10.1007/s10118-025-3386-7
  CLC：
- Received：07 April 2025，
  
  Revised：2025-05-12，
  
  Accepted：21 May 2025，
  
  Online First：30 July 2025，
  
  Published：05 October 2025
- Accepted：
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Jiang, C. Y.; Li, H. R.; Peng, Y.; Zhang, L. Y.; Fan, W. H.; Wang, L. X.; Jiang, M.; Cai, Z. Q.; Dong, L. J. Dual-responsive flexible dielectric switching composites for overheating warning and small deformation monitoring. Chinese J. Polym. Sci. 2025, 43, 1885–1893

Chuan-Yu Jiang, Hai-Rong Li, Yu Peng, et al. Dual-responsive Flexible Dielectric Switching Composites for Overheating Warning and Small Deformation Monitoring[J]. Chinese Journal of Polymer Science, 2025, 43(10): 1885-1893.
Jiang, C. Y.; Li, H. R.; Peng, Y.; Zhang, L. Y.; Fan, W. H.; Wang, L. X.; Jiang, M.; Cai, Z. Q.; Dong, L. J. Dual-responsive flexible dielectric switching composites for overheating warning and small deformation monitoring. Chinese J. Polym. Sci. 2025, 43, 1885–1893 DOI： 10.1007/s10118-025-3386-7.

Chuan-Yu Jiang, Hai-Rong Li, Yu Peng, et al. Dual-responsive Flexible Dielectric Switching Composites for Overheating Warning and Small Deformation Monitoring[J]. Chinese Journal of Polymer Science, 2025, 43(10): 1885-1893. DOI： 10.1007/s10118-025-3386-7.

摘要

Thermo-responsive dielectric switching is enabled by modulating the polarization within the polymer composite by exploiting the conductivity and modulus changes of low-melting-point alloys during phase transitions. Via electron tunneling

it achieves bending/compression-responsive insulator-conductor transitions. Ultimately

this integrates multi-level overheating warning and small deformation monitoring.

Abstract

The phenomena of thermal runaway and accidental deformation due to external stresses in lithium batteries or film capacitors constitute their primary failure mechanisms. Therefore

monitoring and early warning of overheating or localized strain are of great value for the safe use of lithium batteries or film capacitors; however

this function usually requires a system of multiple complex sensors. The realization of the above multiple hazards using a single sensor for monitoring and alarm functions has not been reported. Here

we exploit the thermally induced conductivity and modulus change during solid-liquid conversion of low melting point polyalloys to modulate the electronic relaxation polarization and interfacial polarization in the composites for dielectric switching

and the reduction of alloy particle spacing during bending/compressive strain can be used to generate switchable tunneling effects for insulator-conductor transition. By synergizing dielectric switching and insulator-conductor transition

the final flexible thermoplastic polyurethane elastomer/low-melting-point polyalloy composite film achieves the functional integration of multi-level overheating warning and small deformation monitoring.

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references

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