Testing & Analysis Techniques

EIS Analysis Of Porous Electrodes Using A “Three-Electrodeˮ System Objectives: Re-interpret the EIS of porous electrodes by employing reference electrodes, analyzing frequency-dependent behaviors, and understanding their relationship to ion transport and capacitance. POPULAR UNDERSTANDINGS

NEW UNDERSTANDINGS

High-frequency: Dominated by ion transport within pore channels and solid electrolyte interphase SEI

Experimental Configuration: three-electrode systems implemented in order to isolate working electrode responses EIS Analysis: Nyquist plots and Distribution of Relaxation Times DRT to deconvolute overlapping processes

Mid-frequency: influenced by pseudo-capacitance, distinct from electrical double layer EDL) capacitance

Source: Angew. Chem. Int. Ed. 2024, 63, e202406054 (doi.org/10.1002/anie.202406054, J. Electrochem. Soc., 162 13 A7037A7048 2015

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