Preparation of Freeze Cast T-SOFCs and a Universal Electrochemical Testing Fixture

摘要

Direct Internal Reforming (DIR) has potential to increase the value proposition of Solid Oxide Fuel Cells (SOFCs). Utilizing DIR in SOFCs, however, presents technical challenges. We believe the solution for achieving stable and efficient DIR in the SOFC requires an optimized anode microstructure that is tuned specifically for DIR. An aligned arrangement of hierarchical porosity in the fuel pathway, also while maintaining high surface area, is considered ideal and can be achieved via the freeze cast process. In this research, we present a method to manufacture and electrochemically evaluate tubular SOFCs (T-SOFCs). The freeze casted tubular anode was made and imaged with scanning electron microscopy and then evaluated after corresponding layers of electrolyte and cathode to form a complete electrochemical cell were added. A universal electrochemical performance testing fixture for T-SOFCs is also discussed with regards to facile methods of electrochemical evaluations of T-SOFCs.