Anodic deposition of Mn oxide nanowires for application as

electrochemical capacitors

Presenter: Banafsheh Babakhani

 

 

Electrochemical supercapacitors are currently considered as complementary charge storage devices to conventional batteries in various applications that require high power density. One-dimensional nanostructured materials and nanowires have been intensively investigated structural components in electrochemical energy storage devices, because they provide short diffusion path lengths for ions leading to high charge/discharge rates. Manganese oxide electrodes with nanowire structures are electrochemically synthesized by anodic deposition from a dilute solution of manganese acetate without surfactant or template in galvanostatic mode. The morphology of the electrode depends on the pH of the electrolyte, deposition potential and deposition current density, which greatly influence the electrochemical performance of the capacitor. The electrochemical properties and microstructure of the manganese oxide nanowires are analyzed using cyclic voltammetry and microstructural techniques, such as SEM, XRD, TEM and XPS. The synthesized electrode shows a high rate charge/discharge capability in an aqueous solution of Na2SO4 suitable for application as electrochemical capacitors.