Significantly Enhanced Energy Storage Performances of PEI-based Composites Utilizing Surface Functionalized ZrO_(2) Nanoparticles for High-Temperature Application  

作　　者：Qing-Qing Liu Qiu-Hao Lin Xiao-Dong Qi Nan Zhang Ting Huang Jing-Hui Yang Yong Wang 

机构地区：[1]School of Chemistry,Southwest Jiaotong University,Chengdu 610031,China [2]Key Laboratory of Advanced Technologies of Materials,Ministry of Education of China,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Chinese Journal of Polymer Science》2024年第3期322-332,I0006,共12页高分子科学（英文版）

基　　金：financially supported by Sichuan Science and Technology Program (No.2022ZHCG0122);the NSAF project (No.U2230120);Youth Science and Technology Innovation Team of Sichuan Province of Functional Polymer Composites (No.2021JDTD0009);the Key Researched Development Program of Sichuan Province (No.2022YFG0271)。

摘　　要：Polymer dielectrics with a high energy density and an available energy storage capacity have been playing an important role in advanced electronics and power systems. Nevertheless, the use of polymer dielectrics in harsh environments is limited by their low energy density at high temperatures. Herein, zirconium dioxide(ZrO_(2)) nanoparticles were decorated with amino group utilizing 4,4-methylenebis(phenyl isocyanate)(AMEO) and successfully incorporated into polyetherimide(PEI) matrix. The dielectric properties, breakdown strength, and energy storage performances of PEI/ZrO_(2)-AMEO nanocomposites were investigated from 25 ℃ to 150 ℃. It is found that the combination of moderate bandgap ZrO_(2) with modest dielectric constant and polar groups at interface with deep trap can offer an available strategy to simultaneously increase the dielectric constant and breakdown strength of polymer dielectrics. As a result, the composites containing ZrO_(2)-AMEO exhibit excellent energy storage performance at elevated temperatures. Specially, the PEI-based composites with 3 vol% ZrO_(2)-AMEO display a maximum discharged energy density(U_(d)) of 3.1 J/cm^(3) at 150 ℃, presenting 90% higher than that of neat PEI. This study may help to better develop the polymer-based dielectric composite applied at elevated temperatures.

关 键 词：POLYETHERIMIDE High temperature dielectric ZrO_(2) Interface 

分 类 号：TB332[一般工业技术—材料科学与工程]