Dielectric energy storage properties of 0–3 type BST/PVDF composite films

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2025-03-01 Epub Date: 2024-12-17 DOI:10.1016/j.ceramint.2024.12.266

Yang Tong , Jinguang Lai , Yaxin Tian , Jiachen Liu , Wenle Pei , Hui Yong , Yuting Li , Jungang Li , Jifan Hu

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Abstract

Spin coating was used to fabricate 0–3 type BST/PVDF nanocomposite dielectric films using high-concentration suspensions. Polyvinylidene fluoride (PVDF) served as the matrix material, incorporating Ba_0.8Sr_0.2TiO₃ (BST82) and Ba_0.6Sr_0.4TiO₃ (BST64) nanoparticles, each with a particle size of 200 nm. This study investigates the microstructure, dielectric properties, dielectric temperature spectra, and energy storage performance of the BST/PVDF nanocomposite films with varying volume fractions of BST nanoparticles. The results reveal that as the volume fraction of BST82 and BST64 increases, the dielectric constant, maximum polarization, and remanent polarization increase, while the breakdown field strength decreases. The dielectric constant of the 0–3 type nanocomposite films incorporating BST fits best with the Jayasunder-Smith model across a range of 0 vol% to 20 vol%. Moreover, the maximum discharge energy storage densities of the BST82/PVDF and BST64/PVDF nanocomposite films, at a BST volume fraction of 7 vol%, are 5.74 J/cm³ and 4.21 J/cm³, respectively, under field strengths of 310 MV/m and 270 MV/m. Notably, analysis of the dielectric temperature spectrum reveals that high-temperature dielectric relaxation is primarily governed by the PVDF matrix, with the nanoparticle fillers having no significant impact on this phenomenon. In conclusion, both BST82 and BST64 nanoparticles influence the performance of the polymer films, with BST82-based nanocomposites showing higher breakdown field strength. This study provides valuable insights into the fabrication of high-performance 0–3 type nanoparticle/polymer dielectric nanocomposite films using concentrated BST/PVDF nanosuspensions and the spin coating method.

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0-3型BST/PVDF复合薄膜的介电储能性能

采用高浓度悬浮液，采用自旋镀膜法制备了0-3型BST/PVDF纳米复合介质薄膜。以聚偏氟乙烯（PVDF）为基体材料，加入Ba0.8Sr0.2TiO3 （BST82）和Ba0.6Sr0.4TiO3 （BST64）纳米颗粒，粒径均为200 nm。本研究考察了BST/PVDF纳米复合膜的微观结构、介电性能、介电温度谱和储能性能。结果表明：随着BST82和BST64体积分数的增加，材料的介电常数、最大极化和剩余极化增大，击穿场强减小；含有BST的0 - 3型纳米复合薄膜的介电常数在0 vol%至20 vol%范围内最符合Jayasunder-Smith模型。此外，BST82/PVDF和BST64/PVDF纳米复合膜在BST体积分数为7 vol%时，在310 MV/m和270 MV/m场强下的最大放电储能密度分别为5.74 J/cm³和4.21 J/cm³。值得注意的是，介质温度谱分析表明，高温介质弛豫主要受PVDF基体的控制，而纳米颗粒填料对这一现象没有显著影响。综上所述，BST82和BST64纳米颗粒均影响聚合物薄膜的性能，其中BST82基纳米复合材料表现出更高的击穿场强。本研究为利用浓BST/PVDF纳米悬浮液和自旋镀膜方法制备高性能的0-3型纳米粒子/聚合物介电纳米复合薄膜提供了有价值的见解。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.