AbstractRechargeable Li‐ion battery technology has progressed due to the development of a suitable combination of electroactive materials, binders, electrolytes, additives, and electrochemical cycling protocols that resulted in the formation of a stable electrode‐electrolyte interphase. It is expected that Na‐ion technology will attain a position comparable to Li‐ion batteries dependent on advancements in establishing a stable electrode‐electrolyte interphase. However, Li and Na are both alkali metals with similar characteristics, yet the physicochemical properties of these systems differ. For this reason, a detailed study on the electrode‐electrolyte interphase properties, composition, and structure is required to understand the factors that influence the battery's behavior. Herein, the research that has been performed on the electrode‐electrolyte interphase for both anode and cathode in the most important families of electrode materials, including carbonate ester‐based and advanced electrolytes such as ether‐based carbonates and ionic liquids is presented.