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

中文翻译：

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面向实用钠离子电池的层状氧化物阴极新兴改性策略的最新进展

低成本钠离子电池（SIB）已被广泛认为是成功的锂离子电池的补充甚至替代品。然而，SIBs的实际应用受到其能量密度和循环性能的限制，这主要受到正极侧的限制。因此，开发先进的正极材料对于SIB的实际应用至关重要。在各种正极材料中，层状过渡金属氧化物（LTMO）因其紧凑的晶体结构、低成本、易于制备以及与成功的锂基LTMO的相似性而成为非常有前途的候选材料。不幸的是，钠基LTMO面临的瓶颈问题，例如严重的相变、缓慢的扩散动力学和界面恶化，对实现高性能正极提出了重大挑战。在这篇综述中，对最近报道的层状氧化物改性策略进行了全面的概述和总结，并完善了结构-功能-性能关系。还对钠基LTMO阴极的前景和发展方向进行了展望。该综述全面探讨了Na基LTMOs的改性策略，为Na基LTMOs的未来研究提供了新的视野。