Solid-acid fuel cells

There is an increasing interest in a novel type of fuel cells, the solid-acid fuel cells (SAFCs), which are characterized by impermeability to fuels of the electrolyte, high electrocatalytic activity and high CO tolerance of the electrodes. This paper gives a thorough review on the background and recent progress on SAFCs. The operation principle is described in detail. The key problems for the application of SAFCs are suggested and the possible solutions are proposed.