Sodium–oxygen (Na-O₂) batteries are considered a higher-energy-efficiency alternative to the lithium–oxygen (Li-O₂) system. The reversible superoxide electrochemistry governing the oxygen reduction and evolution reactions in Na-O₂ cells results in a relatively lower charging overpotential. Thus, significant research attention has been directed toward Na-O₂ in the hope of developing a high-energy-storage system. This review provides a brief overview of the most recent research progress in this field with special emphasis on the chemical and electrochemical reaction mechanisms. All major components of the cell including the positive and negative electrodes as well as the electrolyte are covered. Moreover, areas requiring more research attention are specified and potential directions for future research are proposed.

钠氧（Na-O ₂）电池被认为是锂氧（Li-O ₂）系统的高能效替代品。控制Na-O ₂电池中氧还原和放出反应的可逆超氧化物电化学导致相对较低的充电超电势。因此，对Na-O _2的研究已经引起了广泛的关注。希望开发一个高能量存储系统。这篇综述简要概述了该领域的最新研究进展，特别着重于化学和电化学反应机理。电池的所有主要组件（包括正电极和负电极以及电解质）均被覆盖。此外，指定了需要更多研究关注的领域，并提出了未来研究的潜在方向。