Localized Electrochemical Impedance Spectroscopy: Visualization of Spatial Distributions of the Key Parameters Describing Solid/Liquid Interfaces

Abstract

Acquisition of localized electrochemical impedance spectra as a function of spatial coordinates combined with novel approaches of data analysis brings a key for visualization of two-dimensional distributions of important parameters describing solid/liquid interfaces. They include the capacitance of the electric double layer, the resistance of the interfacial charge transfer, capacitances of adsorption, or other parameters depending on the properties of the system. Additionally, the proposed approach eliminates many common methodological problems of localized electrochemical impedance microscopies related to the frequency dependence of the actual pictures and difficulties with raw data interpretation. Thus, it offers a unique insight into the localized processes at the interface which is not possible to achieve using classical techniques.

The Mechanism of the Interfacial Charge and Mass Transfer during Intercalation of Alkali Metal Cations

“…In particular, the commonly observed in battery research “impedance loops” should in many cases be an indication of the specific mechanism of the interfacial charge and mass transfer, rather than an experimental error. However, further investigations including more experimental techniques, for instance other potentiodynamic18, 19 or electrochemical microscopic20, 21, 22 techniques, and aiming at covering a broader choice of intercalation materials and electrolytes are necessary for deeper understanding of the factors governing intercalation of alkali metal cations.…”

Development of quantitative Local Electrochemical Impedance Mapping: an efficient tool for the evaluation of delamination kinetics

“…Recently, local electrochemical scanning techniques have attracted a lot of attention due to their ability to resolve macroscopic electrochemical phenomena on nano-and micrometer scales [1][2][3]. The key parameters of these techniques are (1) the spatial resolution and (2) the spatial quantification i.e.…”

“…in DC amperometric mode). The compulsory presence of a redox mediator in the solution was required for such a purpose, but recent advances in Alternative-Current Scanning Electrochemical Microscopy (AC-SECM) allowed to eliminate this restriction [1,2,11]. The minimal experimental error of the spatial quantification in AC-SECM was in the order of several micrometers achieved on the oriented hematite single crystal surfaces [1].…”

“…The main parameters limiting the spatial resolution were (1) the diameter of microelectrode in the bi-probe (D), (2) the distance between the bi-probe and the working electrode (WE) (h), and (3) the distance between the two microelectrodes (d). In ref.…”

Scanning electrochemical impedance microscopy for investigation of glucose oxidase catalyzed reaction

“…The result of SEIM could be visualized by mapping one of calculated parameters, e.g. charge transfer resistance or double layer capacitance as a function of 3D coordinates [6,7]. Conventional EIS produces averaged data, while the combination of SECM and EIS is providing information about local corrosion phenomena, which could help to identify the location of defects induced by corrosion [7].…”