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Improved sodium storage properties of co-doped Na3V2(PO4)2F3@graphene as anode material for sodium ion batteries.
- Source :
-
Ferroelectrics . 2021, Vol. 584 Issue 1, p221-229. 9p. - Publication Year :
- 2021
-
Abstract
- In this paper, Co-doped Na3V2−xCox(PO4)2F3(x = 0,0.1,0.5,0.7) sodium ion battery anode material was prepared by one-step hydrothermal method, and Na3V1.5Co0.5(PO4)2F3 anode material coated with graphene was also prepared. It is confirmed that moderate Co2+ doping can improve the electrochemical performance of NVPF. Among all samples, Na3V1.5Co0.5(PO4)2F3@Graphene shows the best rate and cycle performance. It exhibits the highest specific capacity of 91.5 and 48.8 mAh/g at 1C, respectively when x = 0.5, after coating graphene, the charge-discharge specific capacities of 1C cycle are 128.2 mAh/g and 63.5 mAh/g for the first time, and 62.2 mAh/g and 45.1 mAh/g for 45 weeks.The performance results show that the excellent electrochemical performance of Na3V1.5Co0.5(PO4)2F3@Graphene can be attributed to the increase in electronic conductivity and ion diffusion coefficient. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00150193
- Volume :
- 584
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Ferroelectrics
- Publication Type :
- Academic Journal
- Accession number :
- 154041110
- Full Text :
- https://doi.org/10.1080/00150193.2021.1984770