Fabrication and investigation of electrochemical characterization of Ba based cathodes
| Autor: | Hadi Salamati, A. Pakzad, Zahra Talaei |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Arrhenius equation
Renewable Energy Sustainability and the Environment Chemistry Diffusion Analytical chemistry Oxide Energy Engineering and Power Technology Activation energy Crystal structure Conductivity Condensed Matter Physics Electrochemistry symbols.namesake chemistry.chemical_compound Fuel Technology Electrical resistivity and conductivity symbols |
| Zdroj: | International Journal of Hydrogen Energy. 35:9401-9404 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2010.05.078 |
| Popis: | In this paper, Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) oxide was prepared, using a solid state reaction method. Crystal structure and electrochemical conductivity of this composition were studied by x-ray diffraction and four-point probe method, respectively. The x-ray pattern shows cubic structure. The resistivity was measured from room temperature up to 450 °C in air. At this condition, resistivity was dropped 99 percent of its original value. In the investigation of the electrochemical properties, D chem , chemical diffusion coefficient and E a , activation energy for hopping of small polarons were calculated by equation Arrhenius. As our results show increasing the temperature leads to higher values of D chem . Log ( D chem ) and inverse temperature were related by a negative slope. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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