Cu掺杂在钠离子电池正极中的研究进展

钠离子电池（SIBs）由于其原料丰富以及成本较低，被认为是最有前途的锂离子电池（LIBs）替代品之一，在过去的几年中吸引了人们的广泛关注。正极作为钠离子电池中不可分割的一部分，其性能对电池的稳定性以及使用寿命起着非常重要的作用。目前，常见的SIBs正极材料主要包括层状过渡金属氧化物、普鲁士蓝类似物、聚阴离子化合物等，这些电极材料容量较高、成本较低、对环境友好，但普遍存在导电性差、循环稳定性差、电池寿命短等缺点。为了改善SIBs性能，人们采用元素掺杂的方法来改变正极材料的晶格结构，增强SIBs的循环稳定性，延长电池寿命。Cu因具有良好的导电性且结构稳定而被人们广泛应用于元素掺杂研究。讨论了Cu掺杂对以上3种SIBs正极材料性能的影响，并总结了近年来Cu掺杂正极材料的设计制备及研究进展。

Research Progress of Cu Doping in Sodium-Ion Battery Cathode

Sodium-ion batteries (SIBs) have been considered the most promising alternative to lithium-ion batteries (LIBs) due to their abundant resources and lower cost, and have attracted a lot of attention in the past few years. As an integral part of sodium ion battery, the performance of cathode material plays a very important role in the stability and lifetime of the battery. At present, the common cathode materials for sodium ion batteries mainly include layered transition metal oxides, Prussian blue analogues, polyanionic compounds, etc. These electrode materials have higher capacity, lower cost and are environmentally friendly, but they also generally have disadvantages such as poor electrical conductivity, poor cycling stability and short battery life. Cu is widely used because of its good electrical conductivity and stable structure. This review discussed the effect of Cu doping on the performance of the above three sodium ion battery cathode materials, and summarized the design, preparation and research progress of Cu doped cathode materials in recent years.