Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling
- Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling
- S. Amaresh; G. J. Kim; K. Karthikeyan; V. Aravindan; 정경윤; 조병원; 이윤성
- Li2CoPO4F; cathode; lithium secondary batteries
- Issue Date
- Physical chemistry chemical physics : PCCP
- VOL 14, NO 34, 11904-11909
- Lithium cobalt fluorophosphate, Li2CoPO4F, is successfully synthesized by a solid state reaction
under Ar flow at 700 ℃. X-ray diffraction and scanning electron microscopic studies are utilized
to analyze the structural and morphological features of the synthesized materials, respectively.
The presence of fluorine is also supported by energy-dispersive X-ray spectroscopy. The
electrochemical properties are evaluated by means of Li/Li2CoPO4F half-cell configurations in
both potentiostatic and galvanostatic modes. The Li/Li2CoPO4F cell delivers an initial discharge
capacity of 132 mA h g-1 at a current density of 0.1 mA cm-2 between 2.0 and 5.1 V at room
temperature. Due to the higher operating potential of the Co2+/3+ couple in the fluorophosphate
matrix, this cell shows a capacity retention of only 53% after 20 cycles, still the material delivered
108 mA h g-1 at a high current rate of 1 C. Cyclic voltammetric studies corroborate the insertion
and extraction of Li+ ions by a single phase reaction mechanism during cycling.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.