Fabrication characteristics of an anode-supported thin-film electrolyte fabricated by the tape casting method for IT-SOFC
✍ Scribed by Jung-Hoon Song; Sun-Il Park; Jong-Ho Lee; Ho-Sung Kim
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 943 KB
- Volume
- 198
- Category
- Article
- ISSN
- 0924-0136
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✦ Synopsis
An anode-supported yttria-stabilized zirconia (YSZ) electrolyte was fabricated using tape casting and co-sintering techniques for use in a solid oxide fuel cell (SOFC). Nickel/YSZ, lanthanum strontium manganite (La 0.85 Sr 0.15 MnO 3 ) and 8 mol% Y 2 O 3 -ZrO 2 were used for the anode, the cathode and the electrolyte, respectively. The anode-supported electrolyte was prepared with a tape casting technique followed by hot pressing lamination. Co-sintering between the anode and the electrolyte was applied at 1350 • C under pressurized conditions to fabricate the anode-supported electrolyte of the unit cell. Scanning electron microscopy (SEM) revealed the crack-free and dense structure of the electrolyte in the unit cell. The open circuit voltage (OCV) of the unit cell was 1.08 V at 750 • C, indicating negligible leakage of fuel through the electrolyte layer. The active layer was applied to the interface between the anode and the electrolyte layer to increase the three-phase boundary, the electrochemical reaction site of the anode. The unit cell having an active layer exhibits good performance due to the drastic reduction of polarization resistance.