Chemical synthesis of spinel cobalt ferrite (CoFe2O4) nano-flakes for supercapacitor application

• DOI: 10.1016/j.apsusc.2012.06.034
• Publication Date: 2012-06-18T14:39:16Z
• Authors: V.S. Kumbhar; A.D. Jagadale; N.M. Shinde; C.D. Lokhande
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract The present paper reveals the formation of cobalt ferrite (CoFe 2 O 4 ) thin film on stainless steel substrate by simple chemical route from an alkaline bath containing Co 2+ and Fe 2+ ions. The films are characterised for structural, surface morphological and FT-IR properties. The XRD and FT-IR studies revealed formation of single phase of CoFe 2 O 4 . The formation of nano-flakes-like morphology is observed from scanning electron microscope. The electrochemical behaviour of CoFe 2 O 4 film has been studied using cyclic voltammetry in 1 M NaOH electrolyte. The maximum specific capacitance of 366 F g −1 is obtained at the scan rate of 5 mV s −1 . Using AC impedance technique equivalent series resistance (ESR) value is found to be 1.1 Ω.