Remarkable High‐Temperature Energy Storage in Co‐Polymerized Polyetherimide Via Constructing Hybrid Electrostatic Potential Barriers

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

Abstract High‐temperature dielectric polymers are increasingly attracting significant interest for energy storage applications in harsh environments. However, the exponentially increased conduction losses under high temperatures and elevated electric fields often cause serious degradation of capacitive performance dielectrics. Unlike most reported energy‐level tuning strategies, this study introduces a novel approach that constructs localized electrostatic barriers to enhance high‐temperature polyetherimide (PEI) films. By copolymerizing amide groups MPD (1,3‐Phenylenediamine) PAB (4,4′‐Diaminobenzanilide) into PEI backbone, strong separation effect dipoles is established, leading potentials difference. Density Functional Theory (DFT) proves intermolecular local potential fluctuations generate hybrid (4.2 eV) trap carriers suppress their migration within spatial freedom domain. Consequently, largely suppressed leakage current enhanced breakdown strength yielded co‐10PAB/90MPD polymer, creating density 4.3 J cm −3 ( η > 90%) at 200 °C as comparison original PEI‐MPD (2.1 ), which surpasses polymers. This work demonstrates promising paradigm dipolar regulation molecular level

Language: Английский

Recent trends in all-organic polymer dielectrics for high-temperature electrostatic energy storage capacitors

Progress in Polymer Science, Journal Year: 2025, Volume and Issue: unknown, P. 101957 - 101957

Published: April 1, 2025

Language: Английский