Dynamic electrochemical impedance spectroscopy reconstructed from continuous impedance measurement of single frequency during charging/discharging

In this study, a novel implementation of dynamic electrochemical impedance spectroscopy (DEIS) is proposed. The method first measures the impedance continuously at a single frequency during one charging/discharging cycle, then repeats the measurement at a number of other selected frequencies. The im...

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Bibliographic Details
Published in:Journal of power sources 2015, Vol.273, p.1098-1102
Main Authors: Huang, Jun, Li, Zhe, Zhang, Jianbo
Format: Article
Language:English
Subjects:
Applied sciences
Battery
Charge transfer
Charging
Direct energy conversion and energy accumulation
Discharge
Dynamic tests
Dynamics
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrochemical impedance spectroscopy
Exact sciences and technology
Impedance
Power sources
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Summary:In this study, a novel implementation of dynamic electrochemical impedance spectroscopy (DEIS) is proposed. The method first measures the impedance continuously at a single frequency during one charging/discharging cycle, then repeats the measurement at a number of other selected frequencies. The impedance spectrum at a specific SOC is obtained by interpolating and collecting the impedance at all of the selected frequencies. The charge transfer resistance, R sub(ct), from the DEIS is smaller than that from the steady EIS in a wide state-of-charge (SOC) range from 0.4 to 1.0, the R sub(ct) during charging is generally smaller than that during discharging for the battery chemistry used in this study.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2014.07.067