Electrochemical measurements of fuel cells based on proton conductor electrolyte Ba-2(In0.8Ti0.2)(2) O5.2-n(OH)(2n) and prepared through a tape casting process and a co-pressing of anode-composite powder and electrolyte tape were performed at 500 degrees C under wet H-2. The varying parameter between the prepared cells was the thickness of the electrolyte that can be controlled during the tape casting process. The maximum power density was obtained for the cell with the thinnest electrolyte (35 mu m) and was about 22 mw cm(-2) with an ohmic resistance about 2 Omega cm(2) at 500 degrees C. (C) 2010 Elsevier B.V. All rights reserved.