Recent Progress in the Emerging Modification Strategies for Layered Oxide Cathodes toward Practicable Sodium Ion Batteries

摘要

Low-cost sodium-ion batteries (SIBs) have been extensively considered asa supplement or even a replacement for successful lithium-ion batteries.However, the practical application of SIBs is limited by their energy densityand cyclic performance, which are mainly constrained by the cathode side.Therefore, the development of advanced cathode materials is essential for thepractical application of SIBs. Among the various cathode materials, layeredtransition metal oxides (LTMOs) are highly promising candidates due to theircompact crystal structure, low-cost, ease of preparation, and similarities tosuccessful Li-based LTMOs. Unfortunately, the bottleneck issues faced by NabasedLTMOs, such as severe phase transitions, sluggish diffusion kinetics,and interface deterioration, pose significant challenges in achieving high-performancecathodes. In this review, a comprehensive overview and summaryof recently reported modification strategies for layered oxides are providedand the structure–function–performance relationship is refined. A perspectiveon the outlook and development direction for Na-based LTMOs cathodes isalso provided. This review comprehensively explores the modification strategiesof Na-based LTMOs, providing a new horizon for future research onNa-based LTMOs.