In this paper the PERFORMANCE of a solid oxide fuel cell (SOFC) in the ANODE-supported structure is numerically investigated. The mass, momentum, and energy equations, as well as the electrochemical and fuel reaction kinetic equations, are solved. To improve the accuracy of the results, complete electrochemical analysis, temperature dependent form of the thermodynamical and physical parameters, radiation model between the SOFC solid surfaces, and five layers of temperature are considered. The results are validated against the available experimental and numerical data and show that the cathode activation, ANODE activation, and ohmic polarizations have major effects on the cell polarization, respectively (in the order given). The molar fraction of the gas components in the fuel channel shows that the fuel internal reforming, which continues up to about 80% of the cell length, is very important in temperature distribution in the cell solid parts.

Microbial Fuel Cell (MFC) is of the renewable energy in which microorganisms play the role of biocatalysts in Ox/Red reactions of a substrate like glucose. In MFC electrode is a key component. In this work, a porous nano-biocomposite electrode based on Bacterial Cellulose (BC) and polyaniline as continuous and dispersed phases respectively were synthesized by in situ chemical polymerization of 4 various concentrations of aniline. The synthesis was studied by FT-IR andFE-SEM. Then it was applied in MFC as an ANODE. PERFORMANCE of MFC was examined in presence of new ANODEs. The resistance of electrodes and produced power and current densities were measured. The maximum power of 375mW/m3 and current of 617 mA/m2 were recorded for the system for the ANODE with maximum aniline concentration.

In this paper, the production of ANODEs of vertical titanium oxide nanotubes is analyzed and optimized by anodizing method. The parameters of the potential difference and the distance between the two electrodes in the anodize process are investigated and the effect of these parameters on morphology and ANODE structure has been investigated. The produced anodic plates, have been investigated by field-scattering electron microscope, X-ray diffraction spectrometer and radiation diffraction. The results indicate that by increasing the applied voltage from 20 to 50 Volt, the anodized nanotube diameter will increase from 50 to 155 nanometre, and after a certain voltage, the structure of the nanotubes is destroyed and nano / micro porosity is created. Also, by increasing the voltage from 20 to 50 volt, the wall thickness of the nanotubes increases from 20 to 50 nanometre. As the duration of the voltage increases, the length of the nanotubes increases; but the thickness and diameter of the nanotubes remain constant. As the gap between the two electrodes increases from 0.5 to 4.5 CM, the thickness of the walls decreases from 57 to 13 nanometre. Thus, by controlling the above mentioned parameters, the optimum state of the anodized nanotubes can be achieved to obtain a more and faster penetration of lithium ions. The results of this research are very useful in improving the PERFORMANCE of lithium ion batteries.

The purpose of the current study is to investigate the effects of gas flow in ANODE channel and within ANODE electrode on concentration impedance of a solid oxide fuel cell. The gas phase mass transport is modelled using transient conservation equations (momentum and species equations). Results show that gas flow and mass transport in the gas channel results in a depressed semicircle in the Nyquist plot with low relaxation frequency (less than 10Hz). In addition, gas transport in the thick porous ANODE leads to a Warburg diffusion impedance with relatively higher relaxation frequency (around 100Hz). The influences of parameters such as inlet gas velocity, electrode thickness and inlet gas compositions are also investigated and the results are discussed. From the simulation results, it is found that the EIS simulation produces a tool for both analysing experimental results of EIS and PERFORMANCE optimization of fuel cells. In addition, the developed simulation tool may allow for a reduction in the amount of costly trial and error experiments.

A 3D model of computational fluid dynamics for an ANODE solid oxide fuel cell is presented. This model incorporates important transport phenomena in a fuel cell such as heat transfer, mass transfer, electrode kinetics, and potential field. The simulation results of the model were compared with the available laboratory data in the same conditions that shows good agreement with other references. In this model, the effect of different parameters such as temperature, pressure, stoichiometry and electrolyte thickness on the fuel cell PERFORMANCE was investigated. The results of this model clearly describe the distribution of species, including reactants and products, temperature distribution, distribution potential, and distribution of current density. The results showed that the temperature, pressure and stoichiometry of the ANODE have a great effect on the PERFORMANCE of the cell so that each parameter increases the PERFORMANCE of the fuel cell PERFORMANCE. On the other hand, increasing the thickness of the electrolyte can have a negative effect on the PERFORMANCE of the fuel cell.