Electrochemical Behaviour of Lithium, Sodium and Potassium Ion Electrolytes in a Na0.33V2O5 Symmetric Pseudocapacitor with High Performance and High Cyclic Stability

Ramu Manikandan, C. Justin Raj, Murugesan Rajesh, Byung Chul Kim, Ju Yong Sim, Kook Hyun Yu

Research output: Contribution to journalArticlepeer-review

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Abstract

A high-performance symmetric supercapacitor was fabricated using a Na0.33V2O5 nanocomposite synthesized by means of a simple co-precipitation technique. The structural and morphological investigation showed that the synthesized Na0.33V2O5 nanocomposite exhibited a monoclinic structure with a nanorod-like morphology. The electrochemical properties of the Na0.33V2O5 symmetric supercapacitor were studied utilizing three different aqueous electrolytes, such as 1 M of LiCl, NaCl and KCl, respectively. Interestingly, the fabricated Na0.33V2O5 symmetric supercapacitors exhibited excellent electrochemical capacitance behaviour in all the electrolytes with a maximum specific capacitance value of 168 F g−1 in 1 M LiCl, 146 F g−1 in 1 M NaCl and 132 F g−1 in 1 M KCl electrolytes at 0.5 A g−1 discharge current density. In addition, Na0.33V2O5 symmetric supercapacitors demonstrated an excellent cyclic stability in 1 M NaCl electrolyte with high capacitance retention of approximately 81 % after 50 000 charge/discharge cycles.

Original languageEnglish
Pages (from-to)101-111
Number of pages11
JournalChemElectroChem
Volume5
Issue number1
DOIs
StatePublished - Jan 2018

Keywords

  • co-precipitation
  • nanorods
  • pseudocapacitors
  • symmetric supercapacitors
  • transition metal oxides

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