| description: |
The materials for cathode for intermediate temperature solid oxide fuel cell with different chemical component balance and microstructural properties (pore volume and pore size distribution, cathode material particle size and size distribution etc.) will be synthesized. The chemical, structural, and effective electrical parameters will be measured using different methods (dilatometry, thermal gravimetry analysis, energy dispersive spectroscopy, secondary ion mass spectroscopy, X-ray diffraction analysis, scanning electron microscopy, atomic force microscopy, scanning tunneling microscopy, BET adsorption, impedance spectroscopy, cyclic voltammetry and chronoamperometry). Different effective electrical parameters (high frequency series resistance, total high-frequency and low frequency polarisation resistance, activation energy, exchange current density, effective transfere coefficient and Tafel constant values) will be calculated to obtain corellation between structural and chemical composition and electrical output of the system studied. Calculated parameters and experimental data will be used to modernise and create up new theoretical models of the influence of SOFCs cathode microstructure to the effective electrical parameters. Higher efficiency of SOFCs electrodes permit to operate the SOFCs in lower temperatures which creates a possibility to use a cheaper construction materials (metal alloys etc.) and decreases the prise of SOFC systems. |