| NASICON型Na4FeV(PO4)3的合成、晶体结构和电化学性能 |
| Synthesis, Crystal Structure and Electrochemical Properties of NASICON-Type Na4FeV(PO4)3 |
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| 摘要: 采用高温熔盐法制备了NASICON型Na4FeV（PO4）3单晶。单晶X射线衍射数据分析表明，Na4FeV（PO4）3属于六方R3c空间群，单胞参数为a=b=0.878 17（4）nm，c=2.170 1（2）nm，Z=6，V=1.449 31（18）nm3。该磷酸盐属于典型的NASICON结构，由PO4四面体和Fe/VO6八面体共顶点组成三维框架结构，提供多维的Na+传输通道，2种不同类型Na+位于框架的间隙。以Na4FeV（PO4）3/C粉末样品作为钠电池正极材料并以金属钠为对电极制备电池时，电化学测试结果表明其具有较高的容量。 |
| 关键词: NASICON 晶体结构 钠离子电池 |
| 基金项目: 陕西省自然科学基础研究计划项目（No.2018JM2021）资助。 |
| Abstract: Herein, the NASICON-type Na4FeV(PO4)3 single crystal was successfully synthesized by high temperature molten salt method. The analysis of single crystal X-ray diffraction data shows that Na4FeV(PO4)3 crystallizes in hexagonal R3c space group with a=b=0.878 17(4) nm, c=2.17 01(2) nm, Z=6 and V=1.449 31(18) nm3. The crystal structure of this phosphate belongs to the typical NASICON structure, which is built up from corner-sharing PO4 tetrahedra and Fe/VO6 octahedra, providing a three-dimensional Na+ transmission channel with two different types of Na+ located in the gap of the frame. Additionally, the electrochemical tests of the as-synthesized Na4FeV(PO4)3/C as cathode material of sodium-ion battery showed a high capacity. |
| Keywords: NASICON crystal structure sodium-ion battery |
| 投稿时间：2021-01-14 修订日期：2021-04-14 |
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| 张育芳,张佩,高建华.NASICON型Na4FeV(PO4)3的合成、晶体结构和电化学性能[J].无机化学学报,2021,37(7):1301-1306. |
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