Potentiodynamical deposition of nanosized manganese oxides as high capacitance electrochemical capacitors

作者：Liu, En Hui^*; Ding, Rui; Meng, Xiang Yun; Tan, Song Ting; Zhou, Ji Cheng

来源：Journal of Materials Science: Materials in Electronics , 2007, 18(12): 1179-1182.

DOI：10.1007/s10854-007-9369-3

Nanosized manganese oxides powders were potentiodynamically deposition onto the Pb substrates by anodic oxidation in 0.5 mol L-1 MnSO4 and 0.5 mol L-1 H2SO4 mixed solution at 40 degrees C. The chemical composition of the sample was determined by complex titration with ethylene diamine tetraacetic acid and redox titration. X-ray diffraction, scanning electron microscopy, cyclic voltammetry, and chronopotentiometry were employed to characterize the materials. The highest specific capacitance of the MnOx composite electrode was up to 420 F g(-1) in 1.0 mol L-1 Na2SO4 electrolyte at the scan rate 5 mV s(-1). The synthesized nanosized manganese oxide exhibited ideal capacitive behavior indicating a promising electrode material for electrochemical supercapacitors.

• 出版日期2007-12
• 单位湘潭大学