南方科技大学知识苑(SUSTech KC): Scalable in-situ surface-coated polymer dielectrics with significantly enhanced high-temperature breakdown strength

题名	Scalable in-situ surface-coated polymer dielectrics with significantly enhanced high-temperature breakdown strength
作者	Dong，Jiufeng; Hu，Renchao; Niu，Yujuan; Li，Li; Li，Shuai; Sun，Liang; Liu，Yuqi; Deng，Xinglei; Li，Liuting; Xu，Xinwei; Pan，Zizhao; Wang，Hong
通讯作者	Wang，Hong
发表日期	2022-12-01
DOI	10.1016/j.mtener.2022.101158
发表期刊	Materials Today Energy 影响因子和分区
ISSN	2468-6069
EISSN	2468-6069
卷号	30
摘要	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.
关键词	Energy storage Entropy Localized states Polyimide Strontium oxide
相关链接	[Scopus记录]
收录类别	EI ; SCI
语种	英语
学校署名	第一 ; 通讯
资助项目	[2021YFB3800603] ; [92066208] ; [KQTD20180411143514543] ; [JCYJ20180504165831308] ; [2021B1212040001]
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000891933300001
出版者	ELSEVIER SCI LTD
EI入藏号	20224613118702
EI主题词	Dielectric losses ; Dielectric materials ; Electric breakdown ; Entropy ; Plastic coatings ; Protective coatings
EI分类号	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记录号	2-s2.0-85141763802
来源库	Scopus
引用统计	被引频次[WOS]：17
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/411766
专题	工学院_材料科学与工程系
作者单位	Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
第一作者单位	材料科学与工程系
通讯作者单位	材料科学与工程系
第一作者的第一单位	材料科学与工程系
推荐引用方式 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).