| Autor: |
A.A. Muneerah, Daming Sun, A.A. Aref, Yiwen Tang, C. Qing, Hai Wang |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Materials Science in Semiconductor Processing. 29:262-271 |
| ISSN: |
1369-8001 |
| DOI: |
10.1016/j.mssp.2014.04.019 |
| Popis: |
Manganese dioxide (MnO 2 ) and CuBi 2 O 4 -doped MnO 2 thin films with different nanostructures were deposited on indium tin oxide (ITO) glass and Ti foil substrates by using a chemical bath deposition (CBD) technique. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron microscopy (XPS). The effects of doping and substrates on electrochemical properties of MnO 2 and CuBi 2 O 4 -doped MnO 2 thin films on ITO glass and Ti foil were investigated. Capacitive properties of MnO 2 and CuBi 2 O 4 -doped MnO 2 thin films electrodes were studied using cyclic voltammetry and electrochemical impedance spectroscopy in a three-electrode experimental setup using 0.1 M Na 2 SO 4 aqueous solution as electrolyte. Specific capacitance, obtained from electrochemical measurement for the CuBi 2 O 4 -doped MnO 2 , exhibited a higher value of 338 F g −1 compared to the MnO 2 exhibiting value of 135 F g −1 . In addition, CuBi 2 O 4 -doped MnO 2 thin films on an ITO electrode had a better and satisfactory specific capacitance value, and exhibited more excellent electrochemical stability and reversibility than Ti foil substrates. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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