Abstract
The anode-supported tubular solid oxide fuel cells were fabricated and joined onto the metal cap (SUS430) for current collecting and sealing by using the induction brazing process. Among five filler materials used in the induction brazing, Ni-based BNi2 has shown the lowest gas permeability of 1×10−6 l cm−2 s−1 at a differential pressure of 3 atm measured with He gas. The electrical conductivity of anode support brazed with BNi2 showed 450 S cm−1 at 750°C and stable value even at the long-term and thermal cycle tests. The brazed anode-supported tubular cell at operating temperature of 750°C produced 210 mW/cm2 at 0.7 V. The gas-tightness was confirmed by open circuit voltage (OCV) value similar to theoretical value. The cell showed a stable performance and OCV for 200 h.
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