钠离子电池铁基正极材料的研究进展

Research Progress on Iron-based Positive Electrode Materials for Rechargeable Sodium Ion Batteries

随着锂电池在新能源汽车和大型定置装备上的应用,稀有金属锂(Li)供应短缺问题日益凸显。因而发展钠离子可充电池尤其是室温钠离子电池受到了全球范围内的重视。相比于其他正极材料,铁基正极材料具有电位高,储量丰富等优势。综述了当前国内外各类钠离子铁基正极材料最新研究进展,介绍了其结构特征和电化学性能,总结了各类型铁基正极材料应用于钠离子电池的优缺点。最后提出新型的高电压聚硫酸根离子铁基正极材料具有诱人的应用前景。

As the application of lithium-ion batteries in field of new energy vehicles and large fixed equipment, rare metal lithium shortage problem become increasingly highlighted. Thus, development of sodium ion rechargeable batteries, especially room-temperature sodium ion batteries have received worldwide attention. Compared to other po- sitive materials, iron-based cathode materials have advantages of high voltage and earth-abundance. Iron-based elec- trode materials, oxides, phosphates, fluorides, etc, as positive electrodes for rechargeable sodium batteries are re- viewed. The structure characteristic and electrochemical properties of materials are introduced. Meanwhile, the ad- vantages and disadvantages of various iron-based cathode materials which can be used in sodium ion batteries are sum- marized. Finally, the attractive application prospect of high-voltage cathode materials （poly-sulfate iron-based elec- trode materials） is put forward.