Fundamentals of Distribution of Relaxation Times for Electrochemical Impedance Spectroscopy

Authors

Jia WANG, 1. Institute for Sustainable Energy, Shanghai University, Shanghai 200444, China;2. Xi’an Key Laboratory of Clean Energy, Xi’an University of Architecture and Technology,Xi’an 710055, China;
Qiu-an HUANG, 1. Institute for Sustainable Energy, Shanghai University, Shanghai 200444, China;Follow
Wei-heng LI, 1. Institute for Sustainable Energy, Shanghai University, Shanghai 200444, China;
Juan WANG, 2. Xi’an Key Laboratory of Clean Energy, Xi’an University of Architecture and Technology,Xi’an 710055, China;Follow
Quan-chao ZHUANG, 3. School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China;
Jiu-jun ZHANG, 1. Institute for Sustainable Energy, Shanghai University, Shanghai 200444, China;Follow

Corresponding Author

Qiu-an HUANG(qiuan_huang@shu.edu.cn);
Juan WANG(juanwang168@gmail.com);
Jiu-jun ZHANG(jiujun.zhang@i.shu.edu.cn)

Abstract

Electrochemical impedance spectroscopy (EIS) is a powerful electrochemical characterization technology, which has been widely used in the field of electrochemical energy, such as lithium-ion batteries, supercapacitors, fuel cells, etc. Distribution of relaxation time (DRT) is an EIS deconvolution technique which does not depend on the prior knowledge of the targeted research object. Furthermore, DRT can serve to separate and analyze physical and chemical processes which are highly overlapped in their EIS data. In order to encourage the application and popularization of DRT deconvolution technology, several core questions are addressed in this paper: (1) DRT deconvolution principle, implementation steps and important extensions; (2) DRT deconvolution method for typical circuit elements; (3) DRT implementation software and typical electrochemical energy application examples; (4) achievements, challenges and development trends for DRT deconvolution technique.

Graphical Abstract

Keywords

electrochemical impedance spectroscopy, distribution of relaxation time, distribution of differential capacity, distribution of diffusion time, characteristic time constant, lithium-ion battery, supercapacitor, fuel cell

DOI Link

https://doi.org/10.13208/j.electrochem.200641

Publication Date

2020-10-28

Online Available Date

2020-07-08

Revised Date

2020-07-05

Received Date

2020-06-08

Recommended Citation

Jia WANG, Qiu-an HUANG, Wei-heng LI, Juan WANG, Quan-chao ZHUANG, Jiu-jun ZHANG. Fundamentals of Distribution of Relaxation Times for Electrochemical Impedance Spectroscopy[J]. Journal of Electrochemistry, 2020 , 26(5): 607-627.
DOI: 10.13208/j.electrochem.200641
Available at: https://jelectrochem.xmu.edu.cn/journal/vol26/iss5/16