Curly-Packed Structure Polymers for High-Temperature Capacitive Energy Storage

Autor: Chenyi Zhou, Wenhan Xu, Bing Zhang, Yunhe Zhang, Chen Shen, Qinfei Xu, Xin Liu, Florian Bertram, Jerzy Bernholc, Zhenhua Jiang, Yingshuang Shang, Haibo Zhang
Rok vydání: 2022
Předmět:
Zdroj: Chemistry of Materials. 34:2333-2341
ISSN: 1520-5002
0897-4756
DOI: 10.1021/acs.chemmater.1c04220
Popis: Chemistry of materials 34(5), 2333-2341 (2022). doi:10.1021/acs.chemmater.1c04220
Polymer film capacitors are ubiquitous in modern electronics and electric systems, but the relatively low working temperatures of polymer dielectrics limit their application in next-generation capacitors. The currently reported high-temperature polymer dielectrics rely on the construction of nanocomposites with wide band gap fillers and cross-linked networks to achieve high breakdown strength and high efficiencies. However, generating the optimal chain structure with intrinsic great high-temperature capacitive properties using a one-component polymer is still challenging. Herein, a giant discharged energy density in neat polymer has been demonstrated in a series of linear poly(arylene ether amide) (PNFA) at 150 °C, which greatly surpass all the current free-standing dielectric polymer films measured in 10 Hz. The maximum discharged energy density with efficiency above 90% of the PNFA is 2.7 J cm–3, which is about 3 times that of the state-of-the-art commercial high-temperature polymer films. The architectures of the amorphous polymers have been identified by synchrotron X-ray diffraction combined with density functional theory calculations. The origins of superior high-temperature capacitive properties are traced to the increased packing density by the curly-packed chain structure. In addition, the reported polymer could be produced using existing industrial-grade processes, which are economical and practical for large-scale applications.
Published by American Chemical Society, Washington, DC
Databáze: OpenAIRE
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