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Alloy construction offers other advantages: a stable, high-performance cathode can be operated at 600-800ยฐC; efficiency losses due to current collection are minimized; and the alloy increases the fuel cell's strength as well as its electronic and thermal conductivity.
Roughly one-third of a fuel cell system's cost rests in the stack, with the remainder in balanceof-plant and power electronics. This means the stack cannot exceed $130/kW if the entire unit is to meet the $400/kW target. 'The low cost of a metal-based SOFC's raw materials, and its design flexibility, should allow a stack to be manufactured below the $130 fuel cell target,' says Visco.
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