| dc.description.abstract | In this study, we improve the electrolyte by changing the composition ratio of the powder and optimizing the preparation of the electrolyte powder. First, we varied the weight ratio of BCZY to NiO in the electrolyte, and then used nano-ball-milling method to refine the particle size of the powder in the the spin-coating slurry. Continuously, during the sintering process, the refined BCZY particles in the improved electrolyte will diffuse to the outermost layer and form a dense film, which is called self-formed electrolyte.
Finally, we test the performance of the cell. According to the analysis on the performance curve, electrochemical impedance spectroscopy (EIS), and SEM images, we can understand the structure of the fuel cells and speculate the reasons for the performance of the cells. After we analyze the experimental results, we observed that the cell with 2 layers of self-formed electrolyte (35 wt% NiO-BCZY) film whose powder is refined by nano-ball-milling has the best performance. At the operating temperature of 800 ℃, the cell has the maximum power density of 446.2 mW/cm2, and it has lower value of the ohmic impedance and polarization impedance than the cell with standard electrolyte(3 wt% NiO-BCZY). Imperfectly, after 24-hour long-term stability test, the decay rate of the cell is 17.43 %. In the future work, it is a great goal to decreasing the decay rate of cell with self-layered electrolyte. | en_US |