| 引用本文: | 高亮,孔德波,商行,张佳琦,文大禹.单层和三层结构的PVDF基复合材料介电与储能特性[J].材料科学与工艺,2022,30(3):66-73.DOI:10.11951/j.issn.1005-0299.20210261. |
| GAO Liang,KONG Debo,SHANG Hang,ZHANG Jiaqi,WEN Dayu.Dielectric and energy storage properties of PVDF-based composites with single-layer and three-layer structures[J].Materials Science and Technology,2022,30(3):66-73.DOI:10.11951/j.issn.1005-0299.20210261. |
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| 摘要: |
| 通过水热合成法制备CaCu3Ti4O12球型颗粒填料,以PVDF为基底,采用溶液逐层涂覆法制备单层和三层结构的PVDF基复合材料。利用X-射线衍射仪和扫描电镜表征材料的微观组织结构,LRC测试仪和铁电综合测试工作站测试其电学性能,研究低填充浓度和多层结构对PVDF基复合材料微观结构、介电特性、极化强度、耐电压特性和储能特性的影响规律。结果表明,CaCu3Ti4O12填料的尺寸约为200 nm,增加其填充浓度,可以提高单层PVDF/CaCu3Ti4O12复合材料的介电特性与极化强度；在3.0vol.%填充量下,复合材料达到最大的介电常数13.2、介电损耗0.074和电位移极化强度4.04 μC/cm2；而在0.5vol.%的超低填充量下,复合材料达到最大的释放能量密度3.51 J/cm3。三层结构的PVDF基复合材料体系中,在上下层复合材料的高介电极化特性与中间层材料的击穿阻挡特性的协同作用下,获得了综合储能特性优化的PVDF基复合材料,使其在300 kV/mm的低电场强度下,达到最高的释放能量密度4.36 J/cm3。 |
| 关键词: CaCu3Ti4O12 复合材料 多层结构 介电常数 释放能量密度 |
| DOI：10.11951/j.issn.1005-0299.20210261 |
| 分类号:TM21 |
| 文献标识码:A |
| 基金项目:绥化学院2020年科研启动基金项目(SQ20001)；黑龙江省省属高等学校基本科研业务费基础研究项目(YWK10236200134). |
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| Dielectric and energy storage properties of PVDF-based composites with single-layer and three-layer structures |
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GAO Liang, KONG Debo, SHANG Hang, ZHANG Jiaqi, WEN Dayu
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(School of Electrical Engineering, Suihua University, Suihua 152061, China)
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| Abstract: |
| Spherical CaCu3Ti4O12 particles were prepared by hydrothermal synthesis method, and taking PVDF as substrate, single-layer and three-layer structural PVDF-based composites were prepared by layer-by-layer solution coating method. The X-ray diffractometer and scanning electron microscopy were used to characterize the microstructure of the materials, and LRC tester and ferroelectric comprehensive test workstation were adopted to test the electrical properties of the materials. The influence of low filling concentration and multilayer structure on the microstructure, dielectric property, polarization strength, withstand voltage characteristic, and energy storage property of the PVDF-based composites was studied. Results show that the size of CaCu3Ti4O12 filler was about 200 nm. The increase in the filling concentration could improve the dielectric property and polarization strength of the single-layer PVDF/CaCu3Ti4O12 composites. Under the filling volume of 3.0vol.%, the composites reached the maximums, including the dielectric constant of 13.2, dielectric loss of 0.074, and electric displacement polarization intensity of 4.04 μC/cm2. However, the maximum discharge energy density of 3.51 J/cm3 of the composites was achieved under an ultra-low filling volume of 0.5vol.%. In the three-layer PVDF-based composite system, with the synergistic effect of the high dielectric polarization characteristics of the upper-layer and lower-layer composites and the breakdown barrier characteristics of the intermediate layer materials, the PVDF-based composites were obtained with comprehensively optimized energy storage, which achieved the highest discharge energy density of 4.36 J/cm3 under the low electric field intensity of 300 kV/mm. |
| Key words: CaCu3Ti4O12 composite multilayer structure dielectric constant discharge energy density |
