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A fuel cell includes a separator plate having first and second flow channels extending therethrough contiguously with an electrode and respectively in flow communication with the cell electrolyte and in flow isolation with respect to such electrolyte. In fuel cell system arrangement, the diverse typ

A fuel cell includes a separator plate having first and second flow channels extending therethrough contiguously with an electrode and respectively in flow communication with the cell electrolyte and in flow isolation with respect to such electrolyte. In fuel cell system arrangement, the diverse type channels are suplied in common with process gas for thermal control purposes. The separator plate is readily formed by corrugation of integral sheet material.

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An electrochemical cell comprising an electrolyte, an electrode contiguous with said electrolyte and plate structure defining first flow passages in flow communication with said electrolyte and second flow passages in flow isolation with respect to said electrolyte and said second passages being bou

An electrochemical cell comprising an electrolyte, an electrode contiguous with said electrolyte and plate structure defining first flow passages in flow communication with said electrolyte and second flow passages in flow isolation with respect to said electrolyte and said second passages being bounded by surface thereof contiguous with said electrode.