Multiple model impedance spectroscopy techniques for testing electrochemical systems

Author(s):  
J.A. Tinnemeyer
MRS Advances ◽  
2018 ◽  
Vol 3 (53) ◽  
pp. 3155-3162 ◽  
Author(s):  
Bo Dong ◽  
Yige Li ◽  
Kazi Ahmed ◽  
Cengiz Sinan Ozkan ◽  
Mihrimah Ozkan

ABSTRACTIt is of great significance to understand and monitor the condition of the commercial batteries in EVs/HEVs and stationary applications under their real working situations. Electrochemical impedance spectroscopy (EIS) has been proved to be a powerful technique for investigating the kinetics and redox reactions at the interfaces, as well as the diffusion behavior in the bulks of every electrochemical systems. Focusing on tracing the temperature of the commercial batteries during the EIS tests at different stages in a well-designed four-week driving simulation, the value of temperature profile during the EIS test as an enhanced indicator to help analyzing the formation of the passivation layers, electrolyte impedance development as well as lithium plating on the anode through EIS analysis have been found.


2015 ◽  
Vol 8 (4) ◽  
pp. 529-546 ◽  
Author(s):  
D.V. RIBEIRO ◽  
C.A.C. SOUZA ◽  
J.C.C. ABRANTES

AbstractElectrochemical techniques are among the most commonly techniques used for the evaluation and study of corrosion in reinforced concrete, including electrochemical impedance spectroscopy (EIS). Electrochemical impedance spectroscopy (EIS) is a powerful technique for characterizing a wide variety of electrochemical systems and for determining the contribution of electrode or electrolytic processes in these systems. The analysis of EIS results on samples of concrete is highly complex due to overlapping arcs from simultaneous phenomena and noise measurement, of course, associated with the heterogeneity of the samples and that complicate the analysis considerably. Thus, this paper proposes a new form of analysis based on the characteristic relaxation angular frequency, w, of each phenomenon and associating the typical capacitances and frequencies.


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