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An advanced blackberry-shaped Na3V2(PO4)3 cathode: Assists in high-rate performance and long-life stability.
- Source :
-
Electrochimica Acta . Dec2018, Vol. 292, p736-741. 6p. - Publication Year :
- 2018
-
Abstract
- Abstract Na 3 V 2 (PO 4) 3 is suitable for the rapid migration of Na+ in the electrochemical reaction process due to its open-ended structure of 3D sodium super ionic conductor type, but the low electronic conductivity and large volume deformation during the repeated Na+ extraction/insertion severely limit its rate and cycle performance. Herein, a blackberry-shaped Na 3 V 2 (PO 4) 3 is synthesized for the first time to address both of the problems, and the structure is composed of aggregated carbon-coated nanoparticles attaching to highly conductive 3D porous carbon scaffolds, hence provides efficient pathways for both electrons and ions. For sodium-ion batteries, the blackberry-shaped Na 3 V 2 (PO 4) 3 exhibits high reversible capacity (116 mA h g−1 at 0.2 C), high-rate performance (83 mA h g−1 at 20 C) and long-life stability (94.4% capacity retention after 4500 cycles at 10 C). The excellent electrochemical performance indicates that blackberry-shaped Na 3 V 2 (PO 4) 3 has better application prospects as an advanced cathode material for sodium-ion batteries. Graphical abstract Image 1 Highlights • The blackberry-shaped Na 3 V 2 (PO 4) 3 is dedicated to promoting more efficient e− and Na+ transport. • It is unique in that it addresses the problems of low electronic conductivity and large volume deformation. • It exhibits high reversible rate capacity (116 mA h g−1 at 0.2 C and 83 mA h g−1 at 20 C). • It exhibits ultra-long-life stability (94.4% capacity retention after 4500 cycles at 10 C). [ABSTRACT FROM AUTHOR]
- Subjects :
- *CARBON foams
*CATHODES
*PERFORMANCES
Subjects
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 292
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 132919681
- Full Text :
- https://doi.org/10.1016/j.electacta.2018.10.007