1. 毕业设计（论文）的内容和要求
本课题将以聚偏氟乙烯（PVDF）为基体，设计 PVDF/BNNS 为三层结构材料的外层、PVDF/BST 作为中间层，通过热压法并进行淬火处理，制备了一种 PVDF基三明治结构的纳米复合材料。
PVDF的β相具有优异的铁电特性，具有较高的极化值，因此有望得到较高的储能密度。
但铁电相其在电场下的翻转迟滞，会导致较大的能量损耗，从而降低储能密度。
2. 参考文献
根据毕业要求指点10.2，毕设期间要进行研究现状调查与总结，要求在开题报告及毕业设计（论文）中涉及的英文文献不少于20篇，其中近5年不少于8篇，英文文献不少于5篇。
以下是与本课题相关的部分文献列表：[1] Zhu YK, Zhu YJ, Huang XY, Chen J, Li Q, He JL, Jiang PK. High Energy Density Polymer Dielectrics Interlayered by Assembled Boron Nitride Nanosheets[J]. Adv. Energy Mater, 2019, 9: 1-10.[2] 徐磊. 高储能Ba0.6Sr0.4TiO3纳米纤维网络/PVDF多层复合薄膜制备及性能研究[D]. 华中科技大学, 2019.[3] 关玉函. 石墨烯/聚合物柔性介电复合材料的制备与性能[D]. 清华大学, 2014.[4] Liu FH, Li Q, Cui J, Li ZY, et al. High-Energy-Density Dielectric Polymer Nanocomposites with Trilayered Architecture[J]. Adv. Funct. Mater, 2017, 27: 1-7.[5] Li JL, Yin JH, Yang C, Li N, et al. Enhanced Dielectric Performance and Energy Storage of PVDF-HFP-Based Composites Induced by Surface Charged Al2O3[J]. Journal of polymer science, part B: polymer physics, 2019, 57: 574583.[6] Chen CT, Wang L, Liu XM, Yang WL, Lin JQ, Chen GR, Yang XR. K0.5Na0.5NbO3-SrTiO3/PVDF Polymer Composite Film with Low Remnant Polarization and High Discharge Energy Storage Density[J]. Polymers, 2019, 11: 1-12.[7] Sai PPS, Sasidhar S, Sai MV, Varma1 KBR. Enhanced dielectric properties and energy storage density of surface engineered BCZT/PVDF-HFP nanodielectrics[J]. Journal of Materials Science: Materials in Electronics, 2018, 29: 61746182. [8] Wang J, Liu SH, Wang JY, Hao HS, Zhao LM, Zhai JW. Improving dielectric properties and energy storage performance of poly(vinylidene fluoride) nanocomposite by surface-modified SrTiO3 nanoparticles[J]. Journal of Alloys and Compounds, 2017, 726: 587-592.[9] Durga Prasad P, Hemalatha J. Dielectric and energy storage density studies in electrospun fiber mats of polyvinylidene fluoride (PVDF)/zinc ferrite (ZnFe2O4) multiferroic composite[J].Physica B: Condensed Matter, 2019, 573: 1-6.[10] Wang Z, Nian WW, Wang T, Xiao YJ, Chen HN. High energy density induced by DA@NBT powders in PVDF flexible and transparent composite films[J]. Journal of Materials Science: Materials in Electronics, 2018, 29: 91299136.
