In situ polymerized polyetherimide/Al₂O₃ nanocomposites with significantly fi cantly improved capacitive energy storage performance at high temperatures

Tan, Li1,2; Dong, Jiufeng1,2; Li, Li1,2; Wang, Chengyuan1,2; Liu, Yuqi1,2; Niu, Yujuan1,2; Pan, Zizhao1,2; Sun, Liang1,2; Wang, Hong1,2

2025

10.1016/j.jmat.2024.03.001

JOURNAL OF MATERIOMICS   影响因子和分区

2352-8478

High-temperature polymer nanocomposites with high energy storage density (Ue) e ) are promising dielectrics for capacitors used in electric vehicles, aerospace, etc. However, filler agglomeration and interface defects at high filler loadings significantly limit the enhancement of Ue e and hamper the largescale production of the nanocomposites. Here, polyetherimide (PEI) nanocomposites with nanoscale alumina (AO) at ultra-low contents were prepared via in situ polymerization from PEI monomers. We compared two composite dielectric preparation methods (in situ polymerization and ordinary solution blending) under the same conditions. In contrast to the nanocomposites obtained by blending PEI polymers with AO, the in situ nanocomposites exhibit substantially improved filler dispersion, together with largely suppressed conduction loss at high fields and high temperatures, leading to comprehensive enhancements of breakdown strength (Eb), b ), charge-discharge efficiency (?)) ?) ) and Ue, e , simultaneously. The 0.3% (in volume) AO filled PEI nanocomposite film exhibits a superior Ue e of 4.8 J/cm3 3 with ?) of 90% at 150 degrees C, which is 128% and 218% higher than those of pristine PEI and the ex situ PEI/AO nanocomposite film under the same conditions, respectively. This work provides a scalable strategy for the preparation of dielectrics with both good processability and excellent high-temperature energy storage performance. (c) 2024 The Authors. Published by Elsevier B.V. on behalf of The Chinese Ceramic Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Polymer nanocomposites High temperature In situ polymerization Energy storage

SCI

英语

第一 ; 通讯

National Key Research & Development Program[2021YFB3800603] ; National Natural Science Foundation of China[92066208] ; Shenzhen Science and Technology Program[KQTD20180411143514543] ; Guang-dong Provincial Key Laboratory Program[2021B1212040001]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:001303341200001

ELSEVIER

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Provis Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Guangdong, Peoples R China

Tan, Li,Dong, Jiufeng,Li, Li,et al. In situ polymerized polyetherimide/Al₂O₃ nanocomposites with significantly fi cantly improved capacitive energy storage performance at high temperatures[J]. JOURNAL OF MATERIOMICS,2025,11(1).

Tan, Li.,Dong, Jiufeng.,Li, Li.,Wang, Chengyuan.,Liu, Yuqi.,...&Wang, Hong.(2025).In situ polymerized polyetherimide/Al₂O₃ nanocomposites with significantly fi cantly improved capacitive energy storage performance at high temperatures.JOURNAL OF MATERIOMICS,11(1).

Tan, Li,et al."In situ polymerized polyetherimide/Al₂O₃ nanocomposites with significantly fi cantly improved capacitive energy storage performance at high temperatures".JOURNAL OF MATERIOMICS 11.1(2025).