Carbon-doped inorganic nanoassemblies as fillers to tailor the dielectric and energy storage properties in polymer-based nanocomposites
Carbon-doped inorganic nanoassemblies as fillers to tailor the dielectric and energy storage properties in polymer-based nanocomposites
复制标题
碳掺杂的无机纳米组装体作为填料用于定制聚合物基纳米复合材料的介电和储能性能
DOI：
10.1016/j.matdes.2020.108486
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发表时间：
2020-03-01
影响因子：
8.4
通讯作者：
Ran, Xianghai
中科院分区：
文献类型：
--
作者：
Chu, Huiying;Fu, Chao;Ran, Xianghai
聚合物基纳米复合材料在开发介电和储能应用方面具有优异的前景，并且与球形纳米复合材料相比，具有大长径比的一维（1D）纳米纤维在提高聚合物纳米复合材料的分散性、介电性能和储能性能方面表现出优越性。在这项工作中，通过易于加工的静电纺丝技术现场设计并合成了新型异质结构碳掺杂无机纳米组件（TiO2/C 纳米纤维，NF）。通过调节预分解条件，得到三种不同碳含量的TiO2/C NFs，分别为2 wt%、4.5 wt%和13.6 wt%。 P(VDF-HIP) 由于其相对较高的介电常数而被选择与制备时的不同纳米纤维结合。对TiO2/C NFs/P(VDF-HFP)纳米复合材料的介电储能性能进行了系统的比较研究。结果表明，纳米复合材料中掺杂适当碳含量的纳米复合材料的介电常数和能量密度显着提高。在相对较低的掺杂含量下，碳纳米粒子可以很好地分散在TiO2/C NFs中，形成大量的微电容器，有利于增强界面极化和抑制损耗。这项工作深入了解了碳掺杂纳米组件的作用，进一步提高了高性能设备应用中聚合物纳米复合材料的储能能力。 (C) 2020 作者。由爱思唯尔有限公司出版
Polymer-based nanocomposites are excellent and promising in developing dielectric and energy storage applications, and one-dimensional (1D) nanofibers with large aspect ratio exhibit superiority in improving dispersibility, dielectric properties and energy storage performance of polymer nanocomposites as compared with their spherical counterparts. In this work novel heterostructural carbon-doped inorganic nanoassemblies (TiO2/C nanofibers, NFs) were designed and synthesized in site via easy-processing electrospinning technique. Three different carbon contents of TiO2/C NFs were obtained as 2 wt%, 4.5 wt% and 13.6 wt% by regulating precalcination conditions, respectively. P(VDF-HIP) was chosen to incorporate with different nanofibers as prepared due to its relatively high dielectric constant. A comparative study on dielectric energy storage performance of the TiO2/C NFs/P(VDF-HFP) nanocomposites has been systematically presented. The results reveal that the dielectric constant and the energy density are significantly enhanced for nanocomposites with appropriate content of doped carbon inside NFs. At relatively low doping content, the carbon nanoparticles could well disperse in TiO2/C NFs for forming numerous micro-capacitors, which is beneficial for enhancing interfacial polarization and suppressing loss. This work provides insights into the effect of the carbon-doped nanoassemblies for further improving energy storage capability of polymer nanocomposites for high-performance device applications. (C) 2020 The Authors. Published by Elsevier Ltd.