Visualizing multi-physical spatiotemporal evolution of dielectric breakdown in high-performance polymeric capacitors

Liu, Zhigang1,2; Fan, Xuhui1,2; Liu, Kaixin1,2; Zhang, Fengyuan1,2; Huang, Boyuan1,2; Wang, Yao3; Li, Jiangyu1,2

2023-10-16

10.1063/5.0173314

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

Pulse power has many important technological applications, for which the dielectric capacitors are essential. It is imperative to understand the breakdown mechanism to improve the dielectric energy storage density, yet the breakdown process involves multi-physical coupling spanning multiple spatial and temporal scales, making its characterization very challenging. Recognizing local field concentration results in local strain concentration through Maxwell's stress, we develop an effective method to visualize the dielectric breakdown process via optic strain measurement. Utilizing high-performance biaxially oriented polypropylene as a demonstration, we find dielectric breakdown is an ultrafast process with breakdown current rising and dropping in just tens of nanoseconds. Rapid temperature rise is observed after breakdown as well due to Joule heating, though both current measurement and temperature mapping offer little insight before breakdown actually occurs. Nevertheless, substantial strain concentration is observed before breakdown, reflecting electric field concentration that eventually leads to breakdown. A well-defined upper bound on the electric field concentration is also noted.

SCI ; EI

英语

NI论文

第一 ; 通讯

This work was supported by the National Natural Science Foundation of China (Nos. 92066203, 12192213, and 52303296), the Guangdong Provincial Key Laboratory Program from Guangdong Science and Technology Department (No. 2021B1212040001), the Guangdong Provi["92066203","12192213","52303296"] ; National Natural Science Foundation of China[2021B1212040001] ; Guangdong Provincial Key Laboratory Program from Guangdong Science and Technology Department[2021KCXTD012] ; Guangdong Provincial Department of Education Innovation Team Program[2021A1515110155]

Physics

Physics, Applied

WOS:001086916600004

AIP Publishing

20234415003729

Polypropylenes ; Strain measurement

Electricity: Basic Concepts and Phenomena:701.1 ; Organic Polymers:815.1.1 ; Mechanical Variables Measurements:943.2

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Peoples R China
3.Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

Liu, Zhigang,Fan, Xuhui,Liu, Kaixin,et al. Visualizing multi-physical spatiotemporal evolution of dielectric breakdown in high-performance polymeric capacitors[J]. APPLIED PHYSICS LETTERS,2023,123(16).

Liu, Zhigang.,Fan, Xuhui.,Liu, Kaixin.,Zhang, Fengyuan.,Huang, Boyuan.,...&Li, Jiangyu.(2023).Visualizing multi-physical spatiotemporal evolution of dielectric breakdown in high-performance polymeric capacitors.APPLIED PHYSICS LETTERS,123(16).

Liu, Zhigang,et al."Visualizing multi-physical spatiotemporal evolution of dielectric breakdown in high-performance polymeric capacitors".APPLIED PHYSICS LETTERS 123.16(2023).