| NASICON型Na4FeV(PO4)3的合成、晶体结构和电化学性能 |
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| 引用本文： | 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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| 作者姓名： | 张育芳 张佩 高建华 |
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| 作者单位： | 西北大学物理学院, 西安 710069 |
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| 基金项目： | 陕西省自然科学基础研究计划项目（No.2018JM2021）资助。 |
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| 摘 要： | 采用高温熔盐法制备了NASICON型Na_4Fe V(PO_4)_3单晶。单晶X射线衍射数据分析表明,Na_4Fe V(PO_4)_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) nm~3。该磷酸盐属于典型的NASICON结构,由PO_4四面体和Fe/VO_6八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Na_4Fe V(PO_4)_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。
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| 关 键 词： | NASICON 晶体结构 钠离子电池 |
| 收稿时间： | 2021/1/14 0:00:00 |
| 修稿时间： | 2021/4/14 0:00:00 |
Synthesis, Crystal Structure and Electrochemical Properties of NASICON-Type Na4FeV(PO4)3 |
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| ZHANG Yu-Fang,ZHANG Pei,GAO Jian-Hua.Synthesis, Crystal Structure and Electrochemical Properties of NASICON-Type Na4FeV(PO4)3[J].Chinese Journal of Inorganic Chemistry,2021,37(7):1301-1306. |
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| Authors: | ZHANG Yu-Fang ZHANG Pei GAO Jian-Hua |
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| Institution: | School of Physics, Northwest University, Xi''an 710069, China |
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| 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. |
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| Keywords: | NASICON crystal structure sodium-ion battery |
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