Stack of fuel cells having anode, cathode and electrolyte and gas diffusion layer and bipolar plates has acid feed unit

摘要

A stack of fuel cells (2) comprises anode (3), cathode (4) and electrolyte (5) and a gas-diffusion layer (6) on the electrolyte side of the electrodes, bipolar plates (7), at least one bipolar plate between two fuel cells and means of conducting reactants both before and after the electrochemical reaction. There is an acid feed unit so formed that, after acid feed, sections, especially ends, of the electrolyte are in contact with the acid.