Preparation and mechanism of CeO₂ interlayer in stabilized ZrO₂-based SOFC

Sm, Gd and Y-doped CeO₂ interlayers have shown great promise for resolving the chemical incompatibility and physical mismatch between the electrode and the electrolyte in SOFC. In this paper, CeO₂ powders synthesized by different methods and their corresponding performance are reported. Moreover, the preparing methods of CeO₂ interlayer film and their properties are reviewed. These methods include physical ones like reactively direct current magnetron sputtering, chemical ones such as flame assisted vapor deposition and sol-gel deposition, and ceramic processes containing electrophoretic deposition, screen printing and dipping deposition. The improvements in the cell performance by introduction of these CeO ₂ interlayers and the related mechanism are discussed in detail, respectively. The sameness and differentness as well as advantage and disadvantage of these preparing methods of CeO₂ interlayer film are elucidated synthetically.