With the increasing maturity of lithium-ion battery (LIB) research and large-scale commercial application, the shortage of lithium resources has gradually emerged. Sodium-ion batteries (SIB) have become a potential choice for secondary battery energy storage systems due to their abundant resources, high efficiency, and ease of use. The cathode materials of sodium-ion batteries affect the key performance of batteries, such as energy density, cycling performance, and rate characteristics. At present, transition metal oxides, polyanion compounds, and Prussian blue compounds have been reported as cathode materials. This paper summarizes the classification, performance characteristics, and research progress of main cathode materials for sodium-ion batteries, and prospects the potential research directions.

中文翻译：

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钠离子电池正极材料研究进展

随着锂离子电池（LIB）研究的日益成熟和大规模商业化应用，锂资源的短缺问题逐渐显现。钠离子电池（SIB）因其资源丰富、效率高、易于使用而成为二次电池储能系统的潜在选择。钠离子电池正极材料影响电池的能量密度、循环性能、倍率特性等关键性能。目前，已报道过渡金属氧化物、聚阴离子化合物和普鲁士蓝化合物作为正极材料。本文综述了钠离子电池主要正极材料的分类、性能特点及研究进展，并对潜在的研究方向进行了展望。