Significantly Enhancing the Energy‐Storage Properties of Polypropylene Films by Physically Manipulating Their Permittivity and Crystalline Behavior with Polar Organic Molecules
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Le résumé fourni par la source
Abstract To meet the increasing demands of modern power electronics for high‐temperature resistance and energy storage performance and avoid the trade‐off between high energy storage (Ue) performance and prominent processability, a strategy to modify polypropylene (PP) by introducing polar electron‐deficient 8‐hydroxyquinoline (8‐HQ) physically during melt extrusion granulation is proposed. 8‐HQ molecules are initially designed to capture charges injected under a high electric field and depress the leakage current density. Unexpectedly, they are found to reside at PP grain boundaries, promoting grain growth and thereby enhancing PP films' mechanical strength. Both effects may address the enhanced breakdown strength (Eb) up to 814 MV m−1. Besides, 8‐HQ increases the permittivity of modified PP films. Due to simultaneously enhanced Eb and dielectric constant, an impressive Ue of 9.87 J cm−3 with a discharge efficiency above 90% is obtained in the optimal sample, and an Ue of 6.96 J cm−3 at 83% efficiency is well retained up to 125 °C, far exceeding the previously reported results. This study offers a novel strategy to modify PP film physically by manipulating its crystalline behavior for high‐pulse energy storage capacitor applications.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Significantly Enhancing the Energy‐Storage Properties of Polypropylene Films by Physically Manipulating Their Permittivity and Crystalline Behavior with Polar Organic Molecules
- Date Crossref
- 16/02/2025
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Xi'an Jiaotong University pays non établi dans la noticeUniversité ou école supérieure
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Naval University of Engineering pays non établi dans la noticeUniversité ou école supérieure
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China Southern Power Grid (China) pays non établi dans la noticeEntreprise
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Second Affiliated Hospital of Xi'an Jiaotong University pays non établi dans la noticeÉtablissement de santé
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Department of Applied Chemistry Xi'an Key Laboratory of Sustainable Energy Materials Chemistry National Innovation Platform (Center) for Industry‐Education Integration of Energy Storage Technology Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education School of pays non établi dans la noticeUniversité ou école supérieure
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Electric Power Research Institute China Southern Power Grid Guangzhou 510663 P. R. China pays non établi dans la noticeStructure de recherche
Xi'an Jiaotong University, Naval University of Engineering et China Southern Power Grid (China), avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.