Structural, morphological and electrochemical supercapacitive properties of sprayed manganese ferrite thin film electrode

• Published in: Journal of analytical and applied pyrolysis 2016-11, Vol.122, p.224-229
• Main Authors: Zate, Manohar K., Jadhav, Vijaykumar V., Gore, Shyam K., Shendkar, Janardhan H., Ekar, Satish U., Al-Osta, Ahmed, Naushad, Mu, Mane, Rajaram S.
• Format: Article
• Language: English
• Subjects: Electrochemical supercapacitor; Spinel ferrite; Spray pyrolysis
• ISSN: 0165-2370; 1873-250X
• DOI: 10.1016/j.jaap.2016.09.020

•Nickel-manganese ferrite (MnFe2O4) thin films are prepared onto glass and stainless-steel using chemical spray pyrolysis method.•Various measurements confirm ferrite structure, spinel phase and nodule-type morphology of MnFe2O4.•Both CV and charge/discharge measurements are performed in 1M KOH, NaOH, Na2SO3, Na2SO4 aqueous electrolytes.•From both measurements, maximum specific capacitances of 313Fg−1 (at scan rate of 5mVs−1 using CV) and 293.5Fg −1 (from discharge curve at 1 mA-cm−2) in 1M KOH are obtained. In this work, the structural and, morphological properties and electrochemical supercapacitor electrode application of manganese ferrite (MnFe2O4) thin films deposited onto glass and stainless-steel substrates using chemical spray method are explored. For confirming the spinel structure and nodule-type morphology of obtained MnFe2O4 film X-ray diffraction pattern and scanning electron microscopy measurements are used. The Fourier transform infrared spectroscopy spectrum reveals presence of tetrahedral and octahedral peaks. The specific capacitance values, obtained using cyclic-voltammetry plots of as-deposited ferrite electrode in 1M KOH, NaOH, Na2SO3, Na2SO4 aqueous solutions at scan rate of 5mVs−1 are respectively 313, 295, 146.02, 180.51Fg−1. The electrochemical impedance spectrum supports for pseudocapacitance behavior in as-deposited MnFe2O4 film electrode.