Pyrolysis Preparation of Nickel Oxide and Its Electrochemical Capacitance

NiO was successfully synthesized by complexing of iminodiacetic acid(IDA) and Ni2+,and then calcined in air at 300℃.XRD,FT-IR,SEM and TG tests were applied to investigate the structure,morphology and the formation mechanism of the as-synthesized NiO.The results showed that the obtained complex firstly turned into elementary substance under pyrolysis and then changed to oxide consisting of nanoparticles and nano-flakes with increase of calcination temperature.Electrochemical properties of the NiO were elucidated by cyclic voltammograms,galvanostatic charge-discharge in 6 mol/L KOH electrolyte.Electrochemical data analysis demonstrated that the as-prepared NiO electrode had a good capacitive behavior and cyclability due to its unique structure and possessed a specific capacitance of 355.8 F/g at a current density of 1 A/g.