文献类型：期刊文献

英文题名：Reduced Polyaniline-Modified NaNbO3 Nanowire/Polyetherimide Nanocomposites for Dielectric Capacitors with Enhanced Dielectric Properties and High Thermal Stability

作者：Ni, Xinyao[1];Lin, Jingyu[1];Yuan, You[1];Wang, Xinhua[1];Zuo, Peiyuan[1];Liu, Xiaoyun[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China

年份：2023

卷号：6

期号：13

起止页码：12588

外文期刊名：ACS APPLIED NANO MATERIALS

收录：;EI(收录号：20232914413765);WOS:【SCI-EXPANDED(收录号:WOS:001016572700001)】；

基金：This work was supported by the National Natural Science Foundation of China (52073091 and 22171086), Shanghai Pujiang Program (22PJ1402500), and the Fundamental Research Funds for the Central Universities (JKD01231701).

语种：英文

外文关键词：dielectric nanocomposites; polyaniline; NaNbO3; high-temperature resistance; antiferroelectric behaviors

摘要：The development of high-performance antiferroelectricceramics/polymericmaterials with great thermal stability has attracted considerableinterest due to their extensive use in efficient power sources andelectronic devices. Nevertheless, the high energy storage densityand thermal stability of dielectrics are seriously restricted dueto their poor processibility and weakened breakdown strength (E (b)). To resolve these tough issues, it wouldbe highly effective and feasible if an organically modified high-aspect-ratioone-dimensional (1D) antiferroelectric ceramic can be employed. Specifically,the 1D nanofiller can extend the breakdown path and improve the localelectric field distribution while the organic modification endowsdielectrics with enhanced interface polarization and improved compatibility,thus yielding high energy storage density. Herein, a series of high-aspect-ratio1D NaNbO3 nanofiller with organic insulating reduced polyaniline(R-PANI) layer are synthesized by the oxidative polymerization andthen introduced into the polyetherimide (PEI) matrix. The preparedNaNbO(3)@R-PANI/PEI nanocomposites possess enhanced dielectricconstant up to 9.8 as well as ultralow dielectric loss (0.009) whilemaintaining the high energy density of 2.46 J/cm(3) (1.4times of that for pure PEI) and high efficiency of 82.6% at 200 MV/mat a small loading of 3 vol %. Depending on the unique structure ofthe coated R-PANI, the 3 vol % NaNbO3@R-PANI/PEI increasedthe energy density up to 4.4 J/cm(3) and maintained highefficiency of 70.9% at 200 MV/m under 150 & DEG;C, therefore makingit a potential candidate for polymeric dielectric materials used inextreme environments.