Synergism Effect of PZT Addition and Dehydrofluorination on Polar Phases and Electrical Properties of PVDF-Based Composites

IF 3.2 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Crystal Growth & Design Pub Date : 2024-11-11 DOI:10.1021/acs.cgd.4c0122710.1021/acs.cgd.4c01227

Ling Zhang, Qianqian Yu, Muhua Yuan, Yisha Ma, Tong Wang and Haijun Wang*,

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Abstract

In this study, dehydrofluorinated poly(vinylidene fluoride)/lead zirconate titanate composites (DHF-PVDF/PZT) were prepared via solution casting, followed by hot pressing. The synergistic effect of dehydrofluorination and PZT addition on the polar phase content and electrical properties of DHF-PVDF/PZT was investigated. The polar phase content of DHF-PVDF increases to 60.76% with the introduction of 9.42% carbon–carbon double bonds and then to 84.96% with the addition of PZT. The dielectric and ferroelectric properties of DHF-PVDF/PZT composites are enhanced under the synergistic effect of PZT addition and dehydrofluorination. The dielectric constant of DHF-PVDF/8 wt %PZT at 1 kHz significantly increases (∼16.0) compared to DHF-PVDF (∼11.9), while dielectric loss remains low. DHF-PVDF/8 wt %PZT also exhibits a high discharge energy density (∼6.43 J/cm³ at 2500 kV/cm) and efficiency (∼45.6%), attributed to the strong localized electric field generated in the composites. The study leads toward a way of developing PVDF/PZT composites for high-energy density capacitors.

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添加 PZT 和脱氢氟化对聚偏二氟乙烯基复合材料极性相和电性能的协同效应

本研究通过溶液浇铸和热压制备了脱氢氟化聚偏二氟乙烯/锆钛酸铅复合材料（DHF-PVDF/PZT）。研究了脱氢氟化和添加 PZT 对 DHF-PVDF/PZT 极性相含量和电性能的协同效应。引入 9.42% 的碳碳双键后，DHF-PVDF 的极性相含量增至 60.76%，加入 PZT 后又增至 84.96%。在 PZT 添加和脱氢氟化的协同作用下，DHF-PVDF/PZT 复合材料的介电性能和铁电性能得到了提高。与 DHF-PVDF 相比（∼11.9），DHF-PVDF/8 wt %PZT 在 1 kHz 频率下的介电常数显著增加（∼16.0），而介电损耗仍然很低。DHF-PVDF/8 wt %PZT 还表现出较高的放电能量密度（2500 kV/cm 时为 6.43 J/cm3）和效率（45.6%），这归功于复合材料中产生的强局部电场。这项研究为开发用于高能量密度电容器的 PVDF/PZT 复合材料提供了一条途径。

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来源期刊

Crystal Growth & Design 化学-材料科学：综合

CiteScore

6.30

自引率

10.50%

发文量

650

审稿时长

1.9 months

期刊介绍： The aim of Crystal Growth & Design is to stimulate crossfertilization of knowledge among scientists and engineers working in the fields of crystal growth, crystal engineering, and the industrial application of crystalline materials. Crystal Growth & Design publishes theoretical and experimental studies of the physical, chemical, and biological phenomena and processes related to the design, growth, and application of crystalline materials. Synergistic approaches originating from different disciplines and technologies and integrating the fields of crystal growth, crystal engineering, intermolecular interactions, and industrial application are encouraged.

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