ENHANCED STABILITY AND ELECTROCHEMICAL PERFORMANCE OF A BaTiO3/PbO2 ELECTRODE VIA A LAYER OBTAINED WITH LAYER ELECTRODEPOSITION IZBOLJ(ANA STABILNOST IN ELEKTROKEMIJSKA ZMOGLJIVOST ELEKTRODE BaTiO3/PbO2, IZDELANE Z ELEKTRODEPOZICIJO PLAST NA PLAST

Herein, the electrodeposition of BaTiO3 and PbO2 on Ti using the layer-by-layer method under different current densities (CDs) and times, was investigated. The weight difference in the deposited BaTiO3 explains the BaTiO3 weight decrease by one order with the increasing CD from 0.025 A cm –2 to 0.125 A cm –2 and also follows the same trend during the PbO2 deposition. The PbO2 deposition at different CDs demonstrates that the deposited PbO2 weight increases by one order with the increasing CD. Also, cyclic voltammetry results explain the low and moderate deposition CDs and the time suitably shows the PbO2 redox behavior. According to SEM and XRD, a CD of 0.05 A cm –2 affects the formation of crystalline BaTiO3 and PbO2 more than higher or lower CDs. Finally, the BaTiO3 and PbO2 layer-by-layer electrode electrodeposited at a moderate CD showed a better stability than the electrode including only PbO2. The use of BaTiO3 is promising for the stability of the PbO2 electrode preparation.