Dendrite-free NaK alloy Anodes: Electrodes preparation and interfacial reaction

Liquid NaK batteries can prevent dendrite growth defects compared with traditional alkaline metal batteries due to their liquid properties. Nevertheless, the application of NaK battery is hindered by the high surface tension and complex interfacial reactions. This review article summarizes the current study and related theories of NaK electrodes, emphasizing the design of electrode structure. The critical factor of reducing the high surface tension of the NaK electrode is regarded to be the affinity force. Electrolyte environment, ion priority, cathode selection are integrated into account in interfacial mechanisms of NaK battery. Here, diverse methods of electrodes fabrication and interfacial reactions are discussed, which provides a wider perspective for applications of NaK electrodes. The outlook not only aims to elaborate the recent advances and research status of NaK electrodes, but also analyses the strategies of forming stable electrodes, intricate interface, and safety issues.