Electrochemically synthesized large area network of CoxNiyAlz layered triple hydroxides nanosheets: A high performance supercapacitor

Vinay Gupta, Shubhra Gupta, Norio Miura

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

A network of CoxNiyAlz layered triple hydroxides (LTHs) nanosheets was prepared by the potentiostatic deposition process at -1.0 V (vs. Ag/AgCl) onto stainless steel electrodes. X-ray diffraction patterns show that the CoxNiyAlzLTHs belong to the hexagonal system with layered structure. Cyclic voltammetry and charge discharge measurements in the potential range of -0.1 to 0.5 V and 0.0-0.4 V, respectively, vs. Ag/AgCl in 1 M KOH electrolyte indicate that CoxNiyAlzLTHs have excellent supercapacitive characteristics. The maximum specific capacitance of ∼1263 F g-1 was obtained for Co0.59Ni0.21Al0.20LTH. The impedance studies indicated highly conducting nature of the CoxNiyAlzLTHs.

Original languageBritish English
Pages (from-to)1292-1295
Number of pages4
JournalJournal of Power Sources
Volume189
Issue number2
DOIs
StatePublished - 15 Apr 2009

Keywords

  • CoNiAl
  • Layered triple hydroxides
  • Potentiostatic deposition
  • Specific capacitance
  • Supercapacitor

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