
Electrophoretic Deposition in the Preparation of Electrolyte Thin Films for Solid Oxide Fuel Cells
Bingguo Zhao, Yadi Liu, Haoran Hu, Yangjun Zhang, Zezhi Zeng
Prog Chem ›› 2023, Vol. 35 ›› Issue (5) : 794-806.
Electrophoretic Deposition in the Preparation of Electrolyte Thin Films for Solid Oxide Fuel Cells
Solid oxide fuel cells (SOFCs) are power generation devices with high efficiency and low emissions. The high operating temperature (700~900 ℃) has impeded the wider adoption of SOFC stacks and limited their lifetime. This has motivated intense research efforts in developing SOFC stacks which can operate at lower temperatures. The thin electrolytes with a thickness smaller than 10 μm could shorten the ion conductive paths and reduce the associated ohmic loss, effectively improving the electrical performance of the low-temperature SOFC. The electrophoretic deposition process has the advantages of low cost and fast manufacturing speed. It is a potential candidate for large-scale commercial production of electrolyte thin films for low-temperature SOFC. In the present article, the research progress of electrophoretic deposition during the past ten years has been summarized. The key results and achievements for the important procedures of the electrophoretic deposition process, which are respectively substrate selection and pretreatment, stable suspension preparation, bubble elimination and heat treatment process, are also discussed and analyzed. The suggestions for future development of the electrophoretic deposition are also provided based on the requirements of large-scale commercialization of thin electrolyte for low-temperature SOFC.
1 Introduction
2 Fundamentals of the electrophoretic deposition process
3 Technical challenges and research progress of electrophoretic deposition process for the preparation of electrolyte thin films
3.1 Substrate selection and pretreatment
3.2 Stable suspension preparation
3.3 Bubble elimination
3.4 Heat treatment process
4 Conclusion and outlook
electrophoretic deposition / dense / electrolyte thin films / intermediate and low temperature / solid oxide fuel cell
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