钠离子电池正极材料V2O5研究进展

钠离子电池(SIBs)具有资源丰富、成本低廉及供应风险低等优势，被认为是极具潜力的下一代电化学储能器件。目前，五氧化二钒(V₂O₅)正极材料因具有高工作电压及高理论容量等优点，逐渐成为SIBs正极材料的研究热点。然而，V₂O₅正极材料的低离子扩散系数、低电导率及反复的离子嵌入/脱嵌所致的结构不稳定等缺点，限制了其在SIBs中的应用。分析了V₂O₅正极材料的晶体结构和储钠机制，并通过形貌控制、晶体结构修饰、化学预插入以及与其他材料复合等改性方法，综述了V₂O₅正极材料在SIBs中的研究进展，最后对V₂O₅正极材料的发展趋势进行了展望。

Research Progress of V2O5 Cathode Material for Sodium⁃Ion Batteries

Sodium?ion batteries (SIBs) have the advantages of rich resources and low cost and supply risk.Therefore,they are regarded as a new generation of electrochemical energy storage devices with great potential.At present,vanadium pentoxide (V₂O₅) has gradually become a research hotspot of cathode materials for SIBs because of its high working voltage and theoretical capacity. However,the disadvantages of V₂O₅ cathode material,including low ion diffusion coefficient,low conductivity,and structural instability caused by repeated ion intercalation/deintercalation,have limited its application in SIBs.This paper analyzed the crystal structure and sodium storage mechanism of V₂O₅ and summarized the research progress of V₂O₅ cathode material in SIBs through modification methods such as morphology control,crystal structure modification,chemical pre?insertion,and composition with other materials.Finally,the paper prospected the development trend of V₂O₅ electrode material.