中文版 | English
Title

Scalable in-situ surface-coated polymer dielectrics with significantly enhanced high-temperature breakdown strength

Author
Corresponding AuthorWang,Hong
Publication Years
2022-12-01
DOI
Source Title
ISSN
2468-6069
EISSN
2468-6069
Volume30
Abstract
Wide bandgap inorganic layers exhibit the effect to improve the insulating properties as charge barrier layers between the electrode and polymer dielectrics. However, their influence mechanisms on the high-temperature breakdown behavior still need to be further revealed. Herein, the in-situ grown strontium oxide (SrO) layers were coated on the surfaces of polyimide (PI) film to conduct this research. Compared with neat PI, the breakdown strength and discharge energy density (efficiency >90%) of the coated film was significantly elevated up 45% and 1000% at 200 °C, respectively. The experimental results show that SrO greatly reduces the entropy of surface molecular conformations and increases the energy level of localized states of PI film. The SrO coating effectively improves the injection barrier and interface trap levels simultaneously, undertakes a higher electric field, and hinders the destruction of PI film's surface molecules by high-energy electrons, thus reducing the conduction loss and constraining the generation and development of electrical trees at high fields. This work not only provides a comprehensive insight into the in-situ oxide coating on the insulating properties in polymer dielectrics but also offers a paradigm for developing scalable dielectric materials with high breakdown strength used in harsh-condition electrification.
Keywords
URL[Source Record]
Indexed By
EI ; SCI
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
[2021YFB3800603] ; [92066208] ; [KQTD20180411143514543] ; [JCYJ20180504165831308] ; [2021B1212040001]
WOS Research Area
Chemistry ; Energy & Fuels ; Materials Science
WOS Subject
Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS Accession No
WOS:000891933300001
Publisher
EI Accession Number
20224613118702
EI Keywords
Dielectric losses ; Dielectric materials ; Electric breakdown ; Entropy ; Plastic coatings ; Protective coatings
ESI Classification Code
Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Dielectric Materials:708.1 ; Coating Materials:813.2 ; Organic Polymers:815.1.1 ; Polymer Applications:817.2
Scopus EID
2-s2.0-85141763802
Data Source
Scopus
Citation statistics
Cited Times [WOS]:3
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/411766
DepartmentDepartment of Materials Science and Engineering
Affiliation
Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
First Author AffilicationDepartment of Materials Science and Engineering
Corresponding Author AffilicationDepartment of Materials Science and Engineering
First Author's First AffilicationDepartment of Materials Science and Engineering
Recommended Citation
GB/T 7714
Dong,Jiufeng,Hu,Renchao,Niu,Yujuan,et al. Scalable in-situ surface-coated polymer dielectrics with significantly enhanced high-temperature breakdown strength[J]. Materials Today Energy,2022,30.
APA
Dong,Jiufeng.,Hu,Renchao.,Niu,Yujuan.,Li,Li.,Li,Shuai.,...&Wang,Hong.(2022).Scalable in-situ surface-coated polymer dielectrics with significantly enhanced high-temperature breakdown strength.Materials Today Energy,30.
MLA
Dong,Jiufeng,et al."Scalable in-situ surface-coated polymer dielectrics with significantly enhanced high-temperature breakdown strength".Materials Today Energy 30(2022).
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