Electrochemical Methods and Protocols for Characterization of Ceramic and Polymer Electrolytes for Rechargeable Batteries

Abstract Solid‐state lithium batteries are widely believed to be the most feasible next‐generation battery technology. New material candidates for solid electrolytes are typically screened using meticulous characterization methods and ranked using metrics such as ionic conductivity, transference number, decomposition voltage, and deposition/stripping overpotential. The determination of these metrics requires the use of a variety of electrochemical experiments, the details of which are scattered across existing literature and could be time‐consuming for a beginner to locate. Here, we present a comprehensive overview of the electrochemical concepts, methods, and protocols adopted to characterize the polymer and ceramic electrolyte candidates for rechargeable batteries. This work facilitates the understanding of the key parameters involved in solid‐state electrolyte characterization and in interpreting their data.