Composition-gradient Benzocyclobutene/Polar Polynorbornene Dielectric Films with Continuous Crosslinked Networks for High-temperature Energy Storage

Yan He; Guo-Dong Li; Quan Sun; Rui Xue; Qi Wang; Wen-Xin Fu

doi:10.1007/s10118-026-3852-x

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Composition-gradient Benzocyclobutene/Polar Polynorbornene Dielectric Films with Continuous Crosslinked Networks for High-temperature Energy Storage

RESEARCH ARTICLE | Updated：2026-10-23

- Composition-gradient Benzocyclobutene/Polar Polynorbornene Dielectric Films with Continuous Crosslinked Networks for High-temperature Energy Storage
- Chinese Journal of Polymer Science Vol. 44, Pages: 1-11(2026)
- Affiliations：
  
  a.Key Laboratory of Science and Technology on High-Tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  b.University of Chinese Academy of Sciences, Beijing 100049, China
  c.Jiangxi Province Key Laboratory of Surface Engineering, School of Materials and Energy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
- Author bio：
  
  fuwenxin@iccas.ac.cn
- Funds：
- DOI：10.1007/s10118-026-3852-x
  CLC：
- Received：02 July 2026，
  
  Accepted：17 August 2026，
  
  Online First：22 October 2026，
  
  Published：2026-09
- Accepted：
Scan QR Code
He, Y.; Li, G. D.; Sun, Q.; Xue, R.; Wang, Q.; Fu, W. X. Composition-gradient benzocyclobutene/polar polynorbornene dielectric films with continuous crosslinked networks for high-temperature energy storage. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3852-x

Yan He, Guo-Dong Li, Quan Sun, et al. Composition-gradient Benzocyclobutene/Polar Polynorbornene Dielectric Films with Continuous Crosslinked Networks for High-temperature Energy Storage[J/OL]. Chinese Journal of Polymer Science, 2026, 441-11.
He, Y.; Li, G. D.; Sun, Q.; Xue, R.; Wang, Q.; Fu, W. X. Composition-gradient benzocyclobutene/polar polynorbornene dielectric films with continuous crosslinked networks for high-temperature energy storage. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3852-x DOI：

Yan He, Guo-Dong Li, Quan Sun, et al. Composition-gradient Benzocyclobutene/Polar Polynorbornene Dielectric Films with Continuous Crosslinked Networks for High-temperature Energy Storage[J/OL]. Chinese Journal of Polymer Science, 2026, 441-11. DOI： 10.1007/s10118-026-3852-x.

摘要

Abstract

A composition-gradient study of benzocyclobutene/polar polynorbornene dielectric films reveals that continuous low-loss network formation

rather than higher polar-group content

is critical for high-efficiency capacitive energy storage at 150–250 °C. Herein

composition-gradient B(

BCB-

P) films were prepared by blending and thermally curing divinyltetramethyldisiloxane-bis(benzocyclobutene) prepolymer (pre-DVS-BCB) with sulfone-functionalized polynorbornene prepolymer (pre-P(

exo

-sulfone))

enabling the roles of polar groups

local packing

network continuity

and charge transport to be compared. The sulfone-containing component increased the high-field effective permittivity

but intermediate blend compositions developed local packing heterogeneity

nanoscale chemical-response variation

enhanced leakage current

and reduced breakdown reliability. In contrast

B(100BCB-0P) maintained characteristic breakdown strengths of 780

698

and 671 MV·m

–1

at 150

200

and 250 °C

respectively

and delivered maximum discharge energy densities of 5.69

5.19

and 3.50 J·cm

–3

at a charge-discharge efficiency (

) above 90%. These results indicate that high-temperature polymer dielectrics require continuous

low-loss network formation rather than simply increased polar-group content.

关键词

Keywords

references

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