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Self-combustion synthesis of Na3V2(PO4)3 nanoparticles coated with carbon shell as cathode materials for sodium-ion batteries.
- Source :
-
Electrochimica Acta . Feb2015, Vol. 155, p23-28. 6p. - Publication Year :
- 2015
-
Abstract
- The real applications of Na 3 V 2 (PO 4 ) 3 cathode material for sodium batteries have been hindered by low-cost and facile synthesis method. Herein, we report a facile self-combustion method to synthesize Na 3 V 2 (PO 4 ) 3 nanoparticles coated with carbon shell (NVP/C). Using as the cathode, the NVP/C is capable of delivering the initial discharge and charge capacities of 100.72 and 111.3 mAh g −1 at the current of 0.1 C in a voltage of 2.5–3.8 V, and the capacity retention of the sample is approximately 95% of its initial specific capacity after 50th cycles. The first-principles simulation results show that the Na ions migration route prefers between two adjacent tetrahedral sites with the vacancy-hopping mechanism in a curved way, with the lowest activation energy of 0.292 eV. The diffusion coefficients D Na + at room temperature was also calculated as higher as 2.38 × 10 −9 cm 2 s −1 . The results suggest great potential of self-combustion synthesized NVP/C as cathode materials for Na-ion batteries. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 155
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 100947145
- Full Text :
- https://doi.org/10.1016/j.electacta.2014.12.160