Electrochemically grown nanocrystalline V 2 O 5 as high-performance cathode for sodium-ion batteries

Hui Ying Li, Cheng Hsien Yang, Chuan Ming Tseng, Sheng Wei Lee, Chun Chuen Yang, Tzi Yi Wu, Jeng-Kuei Chang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


Abstract Nanocrystalline V 2 O 5 with a bilayer structure is directly grown on a steel substrate electrochemically in VOSO 4 -based solution as a cathode for sodium-ion batteries. No complicated slurry preparation procedure, involving polymer binder and conducting agent additions, is needed for this electrode synthesis. The incorporation of NaCH 3 COO in the VOSO 4 solution promotes oxide growth and improves oxide film uniformity. The interlayer distance between two-dimensional V 2 O 5 stacks in the structure is as large as ∼11.6 Å, which is favorable for accommodating Na + ions. The growth potential is critical to determine the oxide architectures and thus the corresponding Na + storage properties (in terms of capacity, high-rate capability, and cycling stability). An optimal charge-discharge capacity of 220 mAh g -1 is achieved for V 2 O 5 grown in an activation-controlled potential region (i.e., 0.8 V vs. an Ag/AgCl reference electrode). This V 2 O 5 electrode shows only 8% capacity decay after 500 cycles.

Original languageEnglish
Article number20875
Pages (from-to)418-424
Number of pages7
JournalJournal of Power Sources
StatePublished - 1 Jul 2015


  • Cathodes
  • Electrochemical growth
  • Nanocrystals
  • Sodium-ion batteries
  • Vanadium oxide


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