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• Micro Fuel Cell
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• Area Specific Resistance

Area Specific Resistance

The area specific resistance (ASR) of a fuel cell is its resistance normalized by its area.

ASR = R * A

An ASR is more fundamental than a resistance because fuel cells are compared on a per-area basis. Then ohmic losses can be found by multiplying a current density times the ASR.

η_ohmic = ASR * j

Good fuel cells target an ASR of 0.1 Ωcm².