Xiaolong Chen, Wenying Zhou, Fang Wang, Hongju Wu, Shaolong Zhong, Bo Li
{"title":"通过解耦粒子内极化和粒子间极化,改善核@双壳结构 Al@Al2O3@PDA/PVDF 纳米复合材料的介电性能","authors":"Xiaolong Chen, Wenying Zhou, Fang Wang, Hongju Wu, Shaolong Zhong, Bo Li","doi":"10.1016/j.mtener.2024.101543","DOIUrl":null,"url":null,"abstract":"Percolating polymeric composites present enormous potential owing to high dielectric constant () which can be realized near the percolation threshold, but the accompanied large loss forbids their extensive use in practice. Great efforts have been devoted to coating conductive particles with an insulating shell for constrained dielectric loss, yet they markedly reduce . In this work, we explore the poly(vinylidene fluoride, PVDF) composites with a serial of core@double-shell Al@AlO@PDA (polydopamine) nanoparticles with various PDA shell thicknesses. It reveals that the high of the nanocomposites results from a fast intra-particle polarization and a slow inter-particle polarization. The formation of double-shell enables the independent control of the two polarizations always coupled in traditional percolating composites. Through facilitating intra-particle polarization and repressing inter-particle polarization, the Al@AlO@PDA/PVDF can achieve a much higher and lower dielectric loss simultaneously, far exceeding the unmodified Al@AlO/PVDF. Moreover, the calculated activation energy of carrier migration in the Al@AlO@PDA/PVDF is obviously higher than that in untreated nanocomposites, indicating enhanced charge-trapping capability in the core@double-shell nanofillers composites. This core@double-shell strategy offers a new paradigm for the design and preparation of percolating composites with desirable dielectric performances.","PeriodicalId":18277,"journal":{"name":"Materials Today Energy","volume":null,"pages":null},"PeriodicalIF":9.0000,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Meliorative dielectric properties in core@double-shell structured Al@Al2O3@PDA/PVDF nanocomposites via decoupling the intra-particle polarization and inter-particle polarization\",\"authors\":\"Xiaolong Chen, Wenying Zhou, Fang Wang, Hongju Wu, Shaolong Zhong, Bo Li\",\"doi\":\"10.1016/j.mtener.2024.101543\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Percolating polymeric composites present enormous potential owing to high dielectric constant () which can be realized near the percolation threshold, but the accompanied large loss forbids their extensive use in practice. Great efforts have been devoted to coating conductive particles with an insulating shell for constrained dielectric loss, yet they markedly reduce . In this work, we explore the poly(vinylidene fluoride, PVDF) composites with a serial of core@double-shell Al@AlO@PDA (polydopamine) nanoparticles with various PDA shell thicknesses. It reveals that the high of the nanocomposites results from a fast intra-particle polarization and a slow inter-particle polarization. The formation of double-shell enables the independent control of the two polarizations always coupled in traditional percolating composites. Through facilitating intra-particle polarization and repressing inter-particle polarization, the Al@AlO@PDA/PVDF can achieve a much higher and lower dielectric loss simultaneously, far exceeding the unmodified Al@AlO/PVDF. Moreover, the calculated activation energy of carrier migration in the Al@AlO@PDA/PVDF is obviously higher than that in untreated nanocomposites, indicating enhanced charge-trapping capability in the core@double-shell nanofillers composites. This core@double-shell strategy offers a new paradigm for the design and preparation of percolating composites with desirable dielectric performances.\",\"PeriodicalId\":18277,\"journal\":{\"name\":\"Materials Today Energy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":9.0000,\"publicationDate\":\"2024-03-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Today Energy\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1016/j.mtener.2024.101543\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Today Energy","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.mtener.2024.101543","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Meliorative dielectric properties in core@double-shell structured Al@Al2O3@PDA/PVDF nanocomposites via decoupling the intra-particle polarization and inter-particle polarization
Percolating polymeric composites present enormous potential owing to high dielectric constant () which can be realized near the percolation threshold, but the accompanied large loss forbids their extensive use in practice. Great efforts have been devoted to coating conductive particles with an insulating shell for constrained dielectric loss, yet they markedly reduce . In this work, we explore the poly(vinylidene fluoride, PVDF) composites with a serial of core@double-shell Al@AlO@PDA (polydopamine) nanoparticles with various PDA shell thicknesses. It reveals that the high of the nanocomposites results from a fast intra-particle polarization and a slow inter-particle polarization. The formation of double-shell enables the independent control of the two polarizations always coupled in traditional percolating composites. Through facilitating intra-particle polarization and repressing inter-particle polarization, the Al@AlO@PDA/PVDF can achieve a much higher and lower dielectric loss simultaneously, far exceeding the unmodified Al@AlO/PVDF. Moreover, the calculated activation energy of carrier migration in the Al@AlO@PDA/PVDF is obviously higher than that in untreated nanocomposites, indicating enhanced charge-trapping capability in the core@double-shell nanofillers composites. This core@double-shell strategy offers a new paradigm for the design and preparation of percolating composites with desirable dielectric performances.
期刊介绍:
Materials Today Energy is a multi-disciplinary, rapid-publication journal focused on all aspects of materials for energy.
Materials Today Energy provides a forum for the discussion of high quality research that is helping define the inclusive, growing field of energy materials.
Part of the Materials Today family, Materials Today Energy offers authors rigorous peer review, rapid decisions, and high visibility. The editors welcome comprehensive articles, short communications and reviews on both theoretical and experimental work in relation to energy harvesting, conversion, storage and distribution, on topics including but not limited to:
-Solar energy conversion
-Hydrogen generation
-Photocatalysis
-Thermoelectric materials and devices
-Materials for nuclear energy applications
-Materials for Energy Storage
-Environment protection
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