FUEL CELL STACK WITH RECYCLING

摘要

The invention relates to a direct methanol fuel cell stack with an at least partial fuel circuit. According to the invention, a means is disposed inside said circuit for reducing the concentration of undesirable by-products. Said means particularly consists of another electrochemical cell to which a current is applied and which re-converts at least partially said by-products into water and methanol by means of an electrochemical reduction reaction. Since the concentration of by-products is small, the loss of current which is required for the additional reduction reaction does not lead to a significant drop in the efficiency of the fuel cell stack.