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Electrochemical capacitive properties of spray-pyrolyzed copper-ferrite thin films
Dukho Ham,장진호,S.H. Pathan,W.Y. Kim,R.S. Mane,주오심,정회일,윤문영,한성환,B.N. Pawar 한국물리학회 2009 Current Applied Physics Vol.9 No.11
We report on the synthesis of copper-ferrite (CuFe2O4) thin films with tiny grain size (150 Å) by a spraypyrolysis method, which may be suitable for supercapacitor applications. The films show specific capacitance (SC) value of 4 F/g, and their redox reaction active sites are investigated by calculating inner and outer charges. Densely compact surface morphology and calculated results, i.e., total charge and redox active sites show that the degree of ion diffusion into CuFe2O4 matrix is dependent on the porous and amorphous structure of thin films.
Rajaram S. Mane,장진호,Dukho Ham,B.N. Pawar,T. Ganesh,한성환,이준기,조병원 한국물리학회 2009 Current Applied Physics Vol.9 No.1
The present article demonstrates the use of low-cost electrochemically synthesized hydrophilic and nanocrystalline tin oxide film electrodes at room temperature in dye-sensitized solar cells and electrochemical supercapacitors. A mixed phase of tin instead of single phase composed of uniformly distributed irregular spherical grains in a nanometer regime scale was obtained. Tin oxide film electrode showed efficient photoperformance when subjected to dye-sensitized solar cells. The interfacial and specific capacitances of 118.4 μF/㎠ and 43.07 F/g, respectively, in 0.1 M NaOH electrolyte were confirmed from cyclic-voltammetry measurement. The present article demonstrates the use of low-cost electrochemically synthesized hydrophilic and nanocrystalline tin oxide film electrodes at room temperature in dye-sensitized solar cells and electrochemical supercapacitors. A mixed phase of tin instead of single phase composed of uniformly distributed irregular spherical grains in a nanometer regime scale was obtained. Tin oxide film electrode showed efficient photoperformance when subjected to dye-sensitized solar cells. The interfacial and specific capacitances of 118.4 μF/㎠ and 43.07 F/g, respectively, in 0.1 M NaOH electrolyte were confirmed from cyclic-voltammetry measurement.
Chang, Jinho,Todkar, V.V.,Mane, Rajaram S.,Ham, Dukho,Ganesh, T.,Han, Sung-Hwan Elsevier 2009 Physica E, Low-dimensional systems & nanostructure Vol.41 No.10
<P><B>Abstract</B></P><P>Stable electrochemical capacitive properties of chemically grown cadmium oxide film electrode composed of micron-sized discrete crystals in 1M Na<SUB>2</SUB>SO<SUB>4</SUB> electrolyte with a specific capacitance of 1190mF/g studied over 1000 cycles are reported. Structural and morphological characterizations of micron-sized discrete CdO crystals have been carried out using power X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. Electrochemical capacitive properties of micron-sized CdO discrete crystals on tin-doped indium oxide electrode have been investigated using cyclic voltammetry and chronopotentiometry.</P>