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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

Publication Date

2020-10-28

Online Available Date

2020-07-08

Revised Date

2020-07-05

Received Date

2020-06-08

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