Interface Regulation of Alkali Metal Anodes for Advanced Alkali Metal Batteries
University of Science and Technology of China (USTC), China;
Alkali metal batteries have been considered as the most promising energy storage systems because of their high theoretical capacity. However, the practical application of alkali metal anodes faces several challenges in terms of unstable SEI structure, dendrite growth and huge volume expansion during the plating and stripping process, which may cause the structure damage of electrode and poor electrochemical performance of alkali metal batteries. To address the above key problems, we have developed some effective strategies to regulate the interface of alkali metal anodes: 1) designing three-dimensional conductive skeleton can reduce local current density and induce uniform interface deposition of alkali metal ions. 2) constructing the artificial interface protective layer on the surface of alkali metal anode could not only improve the mechanical toughness and ion diffusion ability, but effectively reduce the nucleation overpotential of metal ions. 3) modifying the electrolyte and separator can induce uniform metal ions deposition process and suppress the dendrite growth. Our research may provide scientific guidance to promote the commercial development and application of alkali metal batteries.