《Developing status of non-aqueous electrolyte for fast-charging sodium-ion batteries》

Sodium-ion batteries have garnered significant attention owing to their abundant sodium reserves, cost-effectiveness, and operational principles akin to lithium-ion batteries, exhibiting immense potential for large-scale energy storage applications. The advancement of sodium-ion batteries with rapid charge-discharge capabilities can effectively cater to frequency modulation needs in large-scale energy storage systems. As a pivotal component, the electrolyte in sodium-ion batteries plays a crucial role in electrode/electrolyte interface reactions and significantly influences the fast-charging characteristics of these batteries. In this paper, we delve into the opportunities and challenges associated with fast-charging electrolytes in sodium-ion batteries. Furthermore, we discuss the intimate relationship between the fast-charging performance of sodium-ion batteries and the properties of the electrolyte, focusing on the electrolyte's transmission characteristics and electrochemical stability. Lastly, we summarize the current development status of fast-charging electrolytes based on various solvent systems and propose a general design strategy. The comprehensive analysis presented in this paper offers valuable insights and guidance for the research and development of sodium-ion batteries with rapid charge-discharge capabilities.