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Isothermal ageing and thermal cycling are performed on micro-tubular solid oxide fuel cells (SOFCs) in-order to understand degradation and failure mechanisms in micro-tubular SOFCs. For isothermal ageing, the effect of temperature gradients is investigated at 800°C on two micro-tubular SOFC samples (1) 25mm long and (2) 55mm long. A temperature gradient is induced across the cells by passing 25% excess...
During solid oxide fuel cell operation, re-oxidation of the nickel anode can occur due to a disruption in fuel supply, emergency system shutdown or leakages in the fuel delivery channel. Once oxidation occurs, the anode has to be reduced again in order to be ready for use. Cyclic reduction and oxidation (redox) is known to cause severe expansion and contraction in the anode causing significant changes...
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