氟化磷酸钒钠在钠离子电池中的应用进展

Application Progress of Sodium Vanadium Phosphate Fluoride in Sodium Ion Battery

钠离子电池具有安全性高、钠资源丰富、成本低等独特优势,引起了人们的广泛关注。构建具有良好电化学性能的钠离子电池的关键之一就是正极材料的选取,氟化磷酸钒钠[Na_(3)V_(2)(PO_(4))_(2)F_(3)]因其结构稳定性好、离子输运快、工作电位高等特点被认为是一种很有前途的正极材料。但电导率较低,使其电化学性能较差;制备成本较高,阻碍了其大规模应用的发展。综述了在提升Na_(3)V_(2)(PO_(4))_(2)F_(3)电化学性能方面的措施,主要包括改进制备方法、离子掺杂、表面包覆等。为今后高性能Na_(3)V_(2)(PO_(4))_(2)F_(3)的合理设计提供了很好的参考。

Sodium ion batteries have attracted broad attention,due to their high safety,abundant sodium resources,low cost.One of the keys to build sodium ion batteries with good electrochemical performance is the selection of cathode materials.Sodium vanadium phosphate fluoride[Na_(3)V_(2)(PO_(4))_(2)F_(3)]is a promising candidate because of its stable structure,fast diffusion rate of sodium ions and high voltage platform.However,the low electronic conductivity leads to poor electrochemical performance,high cost of Na_(3)V_(2)(PO_(4))_(2)F_(3) hinders the development of its large-scale applications.Some strategies to improve electrochemical performance of Na_(3)V_(2)(PO_(4))_(2)F_(3) is summaried,including morphology design,ion doping,carbon coating,etc.A good reference for the rational design of high-performance Na_(3)V_(2)(PO_(4))_(2)F_(3) in the future is provided.