On the pseudocapacitive behavior of nanostructured molybdenum oxide

Farsi, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s10008-009-0830-5
  3. Abstract:
  4. Nanostructured molybdenum oxide was potentiodynamically deposited onto a stainless steel surface from an aqueous bath by cycling the potential between 0 and -0.75 V vs. Ag/AgCl. The deposit consisted of particulates in the range of 30 to 80 nm. Electrochemical studies under galvanostatic charge/discharge and also impedance spectroscopy revealed capacitive behavior in the potential range of -0.3 to -0.55 V vs. Ag/AgCl with the value of 477 F g-1 at 0.1 mA/cm2. An equivalent circuit comprising of three parallel branches consisting of double-layer capacitance, Warburg impedance, and a constant phase element signifying pseudo-capacitance each coupled with their corresponding resistances was fitted to the experimental findings, and the magnitudes of the elements were derived
  5. Keywords:
  6. Impedance spectroscopy ; Nanostructure ; Electrochemical electrodes ; Molybdenum oxide ; Nanostructures ; Spectroscopy ; Capacitive behavior ; Constant phase element ; Double-layer capacitance ; Electrochemical studies ; Galvanostatic charge/discharge ; Stainless steel surface ; Electrochemical impedance spectroscopy
  7. Source: Journal of Solid State Electrochemistry ; Volume 14, Issue 4 , 2010 , Pages 643-650 ; 14328488 (ISSN)
  8. URL: http://link.springer.com/article/10.1007%2Fs10008-009-0830-5