Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 46, Issue 6, Pages 3689-3694Publisher
SPRINGER
DOI: 10.1007/s11664-017-5298-y
Keywords
Batteries; cathode material; vanadium pentoxide; V2O5; NaxV2O5
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Funding
- National Science Council in Taiwan [MOST 105-ET-E-155-005-ET, MOST 104-2623-E-155-005-ET]
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In this paper, layered vanadium pentoxide (V2O5) is employed as a cathode material for a sodium ion battery. The V2O5 particle sizes range from 200 nm to 500 nm and the shapes of the aggregated V2O5 particles are non-homogeneous and irregular. The material exhibits a first discharge capacity of approximately 208.1 mAh g(-1). The structure of V2O5 changes to a NaxV2O5 structure after Na+ insertion at the first discharge; the structure of NaxV2O5 remains stablea during pound cycling. After 40 cycles, the discharge capacity retains 61.2% of the capacity of the second cycle. The capacity of V2O5 at a high charge/discharge current rate of 1.0 C is 49.1% of capacity at 0.1 C. Furthermore, the capacity returns to the initial value as the discharge rate returns to 0.1 C. The results of electrochemical performance tests indicate that V2O5 is a potential cathode material for sodium ion batteries.
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