Achieving High Energy Density at 200 °C in All-organic Polyimide Dielectrics Enabled by an Ultra-low Loading Multifunctional Porphyrin Crosslinker

Nan Hai; Peng Wu; Kang-Yan Chen; Qiang-Qiang Hai; Hong-Qiang Xia; Jun Zhang; Jie Mao

doi:10.1007/s10118-026-3706-6

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Achieving High Energy Density at 200 °C in All-organic Polyimide Dielectrics Enabled by an Ultra-low Loading Multifunctional Porphyrin Crosslinker

RESEARCH ARTICLE | Updated：2026-07-10

- Achieving High Energy Density at 200 °C in All-organic Polyimide Dielectrics Enabled by an Ultra-low Loading Multifunctional Porphyrin Crosslinker
- Chinese Journal of Polymer Science Vol. 44, Pages: 1-11(2026)
- Affiliations：
  
  School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
- Author bio：
  
  ws1003m@163.com (J.Z.)
  maojie@nxu.edu.cn (J.M.)
- Funds：
- DOI：10.1007/s10118-026-3706-6
  CLC：
- Received：12 March 2026，
  
  Revised：2026-04-02，
  
  Accepted：07 April 2026，
  
  Online First：09 July 2026，
  
  Published：2026-05
- Accepted：
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Hai, N.; Wu, P.; Chen, K. Y.; Hai, Q. Q.; Xia, H. Q.; Zhang, J.; Mao, J. Achieving high energy density at 200 °C in all-organic polyimide dielectrics enabled by an ultra-low loading multifunctional porphyrin crosslinker. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3706-6

Nan Hai, Peng Wu, Kang-Yan Chen, et al. Achieving High Energy Density at 200 °C in All-organic Polyimide Dielectrics Enabled by an Ultra-low Loading Multifunctional Porphyrin Crosslinker[J/OL]. Chinese Journal of Polymer Science, 2026, 441-11.
Hai, N.; Wu, P.; Chen, K. Y.; Hai, Q. Q.; Xia, H. Q.; Zhang, J.; Mao, J. Achieving high energy density at 200 °C in all-organic polyimide dielectrics enabled by an ultra-low loading multifunctional porphyrin crosslinker. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3706-6 DOI：

Nan Hai, Peng Wu, Kang-Yan Chen, et al. Achieving High Energy Density at 200 °C in All-organic Polyimide Dielectrics Enabled by an Ultra-low Loading Multifunctional Porphyrin Crosslinker[J/OL]. Chinese Journal of Polymer Science, 2026, 441-11. DOI： 10.1007/s10118-026-3706-6.

摘要

Abstract

High-temperature polymer dielectrics are critically needed for advanced power electronics; however

their performance is often compromised by charge-transfer complexes (CTC) in aromatic polyimides. To overcome this limitation

we introduced an ultra-low loading of 5

20-tetra(4-aminophenyl) porphyrin (TAPP) as a multifunctional crosslinker into a polyimide (PI) matrix. TAPP simultaneously e

stablishes covalent crosslinking and trap engineering

and its amino groups form a robust network with PI chains

whereas the porphyrin cycle acts as an efficient deep-level charge trap

effectively suppressing CTC formation and charge migration. The optimized PCPI films exhibited a tunable non-monotonic dielectric constant while maintaining a low loss. The PCPI-0.1 sample shows a significantly enhanced breakdown strength and achieves high discharge energy densities of 8.78

6.09

and 4.97 J·cm

−3

at 25

150

200 °C

respectively

while maintaining an efficiency above 85%. Remarkably

PCPI-0.1 delivered superior energy density compared to most high-temperature polymer dielectrics reported in the literature

coupled with excellent cycling stability and aging resistance. This work presents a strategy based on ultra-low-loading crosslinking that integrates structural modulation with deep-trap engineering

offering a viable pathway to high-performance all-organic dielectrics for extreme-condition applications.

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references

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