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
- 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 2026年44卷页码：1-11
- 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：
  
  This work was financially supported by the Special Project for Central Guiding Local Science and Technology Development (No. 2024FRD05061), the National Natural Science Foundation of China (No. 52503005), and Natural Science Foundation of China Ningxia Hui Autonomous Region (No. 2023AAC03016).;The authors declare no interest conflict.Electronic supplementary information (ESI) is available free of charge in the online version of this article at http://doi.org/10.1007/s10118-026-3706-6.The original raw data underlying this study have been submitted as separate supplementary files accompanying the manuscript. Additional data related to this paper may be requested from the corresponding author.
- DOI：10.1007/s10118-026-3706-6
  中图分类号：
- 收稿：2026-03-12，
  
  修回：2026-04-02，
  
  录用：2026-04-07，
  
  网络首发：2026-07-09，
  
  纸质出版：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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