中文摘要：

当为钠离子电池的阴极材料被调查，在 NaVPO4F 的电气化学的性质上做的艾尔的效果。做 Al 的 NaV1 ? xAlxPO4F (x=0， 0.02 ) 样品被简单高温度准备固态为钠离子电池的阴极材料的申请的反应包含 VPO4 和 NaF。材料的晶体结构和形态学被粉红外线的 spectrometry (英尺红外) 学习， X 光检查 diffractometry (XRD ) 和扫描电子显微镜学(SEM ) 。结果显示出那 NaV1 ? xAlxPO4F (x=0， 0.02 ) 有典型单斜晶的结构。在阴极材料的表演上做的艾尔的效果以晶体结构，费用分泌物曲线和周期性能被分析。NaV0.98Al0.02PO4F 在 3.0 4.5 V 的电压范围与 undoped 样品相比显示出改进阴极的行为和分泌物能力保留，这被发现。从 NaV0.98Al0.02PO4F 准备的电极交付 80.4 妈· h /g 和起始的 coulombic 的一个起始的分泌物能力 89.2% 的效率，和能力保留在第 30 周期以后是 85% 。尽管做 Al 的样品有更低的起始的能力，他们比 Al 免费的样品显示出更好的周期性能。

英文摘要：

The effects of Al doping on the electrochemical properties of NaVPO4F as a cathode material for sodium-ion batteries were investigated. Al-doped NaV1-xAlxPO4F （x=0, 0.02） samples were prepared by a simple high temperature solid-state reaction involving VPO4 and NaF for the application of cathode material of sodium-ion batteries. The crystal structure and morphology of the material were studied by Flourier-infrared spectrometry（FT-IR）, X-ray diffractometry（XRD） and scanning electron microscopy（SEM）. The results show that NaV1-xAlxPO4F （x=0, 0.02） has a typical monoclinic structure. The effects of Al doping on the performance of the cathode material were analyzed in terms of the crystal structure, charge-discharge curves and cycle performance. It is found that NaV0.98Al0.02PO4F shows an improved cathodic behavior and discharge capacity retention compared with the undoped samples in the voltage range of 3.0-4.5 V. The electrodes prepared from NaV0.98Al0.02PO4F deliver an initial discharge capacity of 80.4 mA.h/g and an initial coulombic efficiency of 89.2%, and the capacity retention is 85% after 30th cycle. Though the Al-doped samples have lower initial capacities, they show better cycle performance than Al-free samples.