ZIF-8/PEI介电复合材料的制备及其高温储能性能

doi:10.19976/j.cnki.43-1448/TF.2026020

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Abstract To address the issue of deteriorated energy storage performance in traditional polyetherimide (PEI) dielectrics under high-temperature conditions, this work prepared zeolitic imidazolate framework-8 (ZIF-8) with highly uniform morphology via a mild precipitation method. Dielectric composites with varying filler contents were fabricated by incorporating ZIF-8 as a functional filler into the PEI matrix. Scanning electron microscope, impedance analyzer, high-temperature dielectric spectrometer, and ferroelectric analyzer were employed to investigate the microstructure, dielectric properties, and high-temperature energy storage performance of ZIF-8/PEI dielectric composites. The results indicate that when w(ZIF-8)=2%, the composite exhibits optimal energy storage performance. The maximum energy density at room temperature reaches 9.50 J/cm³, representing a 57% improvement over pristine PEI (6.05 J/cm³). Under harsh conditions of 150 ℃ and an energy efficiency exceeding 90%, the composite maintains an energy density of 3.44 J/cm³, significantly outperforming the 1.00 J/cm³ of pristine PEI and demonstrating excellent high-temperature energy storage stability. The enhanced performance of the composite stems from the wide bandgap of ZIF-8, which builds electron migration barrier that effectively suppresses leakage current and inhibits space charge accumulation.

Key words： dielectric composite metal-organic framework PEI energy storage performance capacitor high temperature

Received: 10 February 2026 Published: 08 September 2026

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	YANG Chenchen
	LI Xiaona
	WANG Fan
	LUO Hang
	ZHANG Dou

Cite this article:

YANG Chenchen,LI Xiaona,WANG Fan, et al. Fabrication and high-temperature energy storage performance of ZIF-8/PEI dielectric composites[J]. Materials Science and Engineering of Powder Metallurgy, 2026, 31(4): 342-354.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2026020 OR http://pmbjb.csu.edu.cn/EN/Y2026/V31/I4/342

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