二次钠-空气电池具有高达1600 Wh.kg^-1的理论能量密度、2.3 V的理论放电电压平台和丰富的钠资源等优点，成为近年来的研究热点. 人们对钠-空气电池的研究时间较短，还有大量的问题需要解决. 本文根据近几年对于二次钠-空气电池的初步研究，并结合作者课题组在钠电池研究领域的探索和体会，总结了目前钠-空气电池核心问题的主要研究进展，并对钠-空气电池应用前景进行了展望.

Rechargeable sodium-air batteries have been the focus in the fields of batteries and energy storage recently, owing to their high specific energy density (1600 Wh?kg-1), an equilibrium discharge potential of 2.3 V and earth-abundant sodium element. However, research on sodium-air cells is still in an infant age and presents many scientific issues. Based on recently reported work and our own experience on sodium-based batteries, this review summarizes the research progress related to the critical scientific issues of secondary sodium-air batteries and the application prospect of sodium-air battery.