Nanocellulose/BaTiO3 composite films with improved breakdown strength and energy density for dielectric capacitors

IF 4.9 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD

Cellulose Pub Date : 2025-03-22 DOI:10.1007/s10570-025-06488-w

Zhongbo Wu, Zhuqun Shi, Chuanxi Xiong, Quanling Yang

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引用次数: 0

Abstract

The limited energy storage density which is ascribed to low dielectric constant impedes the more diversified applications of polymer dielectric capacitors, and the environmental pollution problem caused by petroleum-based polymers cannot be ignored. Cellulose has the characteristics of wide source, low cost, and strong polarization generated by the hydroxy groups on the molecular chain giving it a high dielectric constant. In addition, nanocellulose has excellent mechanical properties that enable it to be fabricated into homogeneous films with high tensile strength. In this work, barium titanate nanoparticles (BTNPs) were incorporated into nanocellulose films to obtain enhanced dielectric performance. The composite film has the best comprehensive performance with BTNP content of 0.9 wt.%, resulting in a discharge energy density of 5.21 J cm⁻³ and charge/discharge efficiency of 77.7% at 350 MV m⁻¹. Consequently, nanocellulose-based dielectric materials give great promise for applications in biopolymer-based dielectric capacitors.

Graphical abstract

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具有提高介质电容器击穿强度和能量密度的纳米纤维素/BaTiO3复合薄膜

低介电常数限制了聚合物介质电容器的储能密度，阻碍了聚合物介质电容器更多样化的应用，而石油基聚合物所造成的环境污染问题也不容忽视。纤维素具有来源广、成本低、分子链上羟基产生的强极化等特点，具有较高的介电常数。此外，纳米纤维素具有优异的机械性能，使其能够制成具有高拉伸强度的均匀薄膜。在这项工作中，钛酸钡纳米颗粒（BTNPs）被加入到纳米纤维素薄膜中，以获得增强的介电性能。当BTNP含量为0.9 wt.%时，复合膜的综合性能最佳，在350 MV m−1下，放电能量密度为5.21 J cm−3，充放电效率为77.7%。因此，纳米纤维素基介电材料在生物聚合物基介电电容器中具有广阔的应用前景。图形抽象

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.