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Side-Chain-Type Polyimide-Cu Complexes with Suppressed Activation Energy of Relaxation for Advanced High-Temperature Capacitor.
- Source :
-
Chinese Journal of Polymer Science (Springer Science & Business Media B.V.) . Aug2024, Vol. 42 Issue 8, p1038-1048. 11p. - Publication Year :
- 2024
-
Abstract
- The burgeoning growth of the new energy vehicles and aviation industry has escalated the need for energy storage capacitors capable of stable operation in harsh environments. The advent of metal-polyimide complexes has illuminated a novel approach for preparing temperature-resistant capacitors. However, the general application of these metal-polyimide complexes is impeded by the high dielectric loss and low breakdown strength, consequences of main-chain coordination and excessive metal ions content. Herein, our study proposes a novel polyimide-Cu complex material (POP-Cu) predicated on side-chain-type pyridine-Cu coordination, utilizing the structural backbone PMDA-ODA of mature commercial PI (Kapton) with reliable performance. Owing to the high degree of freedom afforded by the side chain with suppressed relaxation activation energy and the long-range electron delocalization formed by d-π coordination, the dielectric constant of this material containing merely 2.7 mol% Cu increases from 3.25 (POPI) to 5.58, while maintaining a remarkably low dielectric loss of 0.0066. Meanwhile, this material exhibits a substantial DC breakdown strength of 436.2 MV·m−1 and a high energy density of 5.42 J·cm−3, coupled with superior mechanical and thermal properties. Even at 150 °C, it retains over 90% of its room-temperature energy density, demonstrating notable dielectric stability under high temperatures. These attributes underscore its promising application for capacitors operating in harsh environments. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02567679
- Volume :
- 42
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Chinese Journal of Polymer Science (Springer Science & Business Media B.V.)
- Publication Type :
- Academic Journal
- Accession number :
- 179086608
- Full Text :
- https://doi.org/10.1007/s10118-024-3131-7