Energy storage enhancement of P(VDF-TrFE-CFE)-based composites with double-shell structured BZCT nanofibers of parallel and orthogonal configurations
Energy storage enhancement of P(VDF-TrFE-CFE)-based composites with double-shell structured BZCT nanofibers of parallel and orthogonal configurations
复制标题
平行和正交配置双壳结构 BZCT 纳米纤维增强 P(VDF-TrFE-CFE) 基复合材料的储能
DOI：
10.1016/j.nanoen.2019.104195
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发表时间：
2019
期刊：
影响因子：
17.6
通讯作者：
Lei Qingquan
中科院分区：
文献类型：
--
作者：
Zhang Yue;Zhang Changhai;Feng Yu;Zhang Ti;ong;Chen Qingguo;Chi Qingguo;Liu Lizhu;Wang Xuan;Lei Qingquan
近年来，在开发用于电能转换的柔性聚合物介电材料方面的研究正在兴起。本文提出了一种具有改善低电场强度下储能密度和效率等性能潜力的新型储能聚合物基复合材料。铁电聚合物P（VDF-TrFE-CFE）（PVTC）与线性聚甲基丙烯酸甲酯（PMMA）共混作为基体，以确保更高的极化和更低的能量损失。同时，无机0.5Ba（Zr0.2Ti0.8）O3-0.5（Ba0.7Ca0.3）TiO 3（BZCT）纳米纤维作为填料，核壳结构的双过渡层（Al 2 O3 +SiO2）作为界面。最后，制备了具有平行和正交双壳结构BZCT纳米纤维的P（VDF-TrFE-CFE）基复合材料。系统地初步探讨了BZCT@Al2O3@SiO2纳米纤维的微观结构信息（基体、填料、界面）以及纤维的不同构型（平行构型和正交构型）对复合材料性能的影响。含3vol%BZCT@A@S纳米纤维的正交BZCT @ A @ S纳米纤维PVTC + PM复合材料在~440 kV/mm下具有良好的放电能量密度（~20.1 J/cm 3）和~58.6%的充放电效率，同时其面内热导率达到~0.33 W/（m·K）。结合实验结果和模拟结果，提出了与快速极化铁电填料相关的机理。
Recent research in the development of flexible polymer dielectric materials for the conversion of electrical energy is springing up. A state-of-the-art energy-storage polymer-based composite with the potential of improving the performances (energy-storage density and efficiency) at the low electric field strength is proposed here. The ferroelectric polymer P(VDF-TrFE-CFE) (PVTC) blending with linear polymethyl methacrylate (PMMA) is used as the matrix to ensure higher polarization and lower energy loss. Meanwhile, the inorganic 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3(BZCT) nanofibers work as the filler, and the double transition layers of core-shell structure (Al2O3+SiO2) serve as the interface. Finally, P(VDF-TrFE-CFE)-based composites with double-shell structured BZCT nanofibers of parallel and orthogonal configurations were fabricated. The effects of microstructure information (matrix, filler, interface) together with different configurations (parallel and orthogonal configurations) of BZCT@Al2O3@SiO2nanofibers on the performances of nanocomposites were systematically and primarily discussed. Importantly, the Orthogonal BZCT@A@S⊥PVTC + PM composite with 3 vol% BZCT@A@S NFs possessed an excellent discharged energy density (~20.1 J/cm3) with charge-discharge efficiency of ~58.6% at ~440 kV/mm; meanwhile, the in-plane thermal conductivity of it reaches to ~0.33 W/(m·K). Referring to the experimental findings and simulation results, a mechanism related to rapidly polarized ferroelectric filler was proposed.