Enhancing energy storage performance of all-organic dielectrics by constructing semi-interpenetrating polymer network structure via in situ polymerization

IF 12.5 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2026-04-01 Epub Date: 2026-02-24 DOI:10.1016/j.cej.2026.174557

Junhang Tang , Ran Wang , Zhuobin Qi , Yuqi Shi , Zepeng Mao , Jun Zhang

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Abstract

The development of dielectric materials with high discharge energy density and efficiency is the key to improving the energy storage performance of electrostatic capacitors. All-organic dielectrics demonstrate great potential in the field of dielectric energy storage due to their light weight, high insulation, and easy processing. Poly(vinylidene fluoride) (PVDF) has a high dielectric constant and polarization, but its severe intrinsic polarization loss results in low charge-discharge efficiency. In this work, a dielectric film with a semi-interpenetrating polymer network (SIPN) structure is constructed via in situ polymerization, wherein PVDF has a linear molecular chain structure and poly(methyl methacrylate) (PMMA) forms a crosslinked network structure. It has been demonstrated that the charge carrier trapping effect of the SIPN structure and its enhancement of the film's Young's modulus can effectively suppress conduction loss and electromechanical breakdown. The film with the SIPN structure exhibits a discharge energy density of 21.3 J/cm³ at 650 MV/m, which represents an enhancement of 407% and 173% compared to pure PVDF and the PVDF/PMMA composite film, respectively.

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通过原位聚合构建半互穿聚合物网络结构，提高全有机电介质的储能性能

开发放电能量密度高、效率高的介质材料是提高静电电容器储能性能的关键。全有机介电材料以其重量轻、绝缘性高、易于加工等优点在介电储能领域显示出巨大的潜力。聚偏氟乙烯（PVDF）具有较高的介电常数和极化特性，但严重的本征极化损耗导致其充放电效率较低。在本研究中，通过原位聚合构建了具有半互穿聚合物网络（SIPN）结构的介质膜，其中PVDF具有线性分子链结构，聚甲基丙烯酸甲酯（PMMA）形成交联网络结构。实验结果表明，SIPN结构的载流子俘获效应及其对薄膜杨氏模量的增强可以有效地抑制导电损耗和机电击穿。在650 MV/m下，该膜的放电能量密度为21.3 J/cm3，比纯PVDF和PVDF/PMMA复合膜分别提高了407%和173%。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.