Author/Authors :
Siracusano، نويسنده , , S. and Di Blasi، نويسنده , , A. and Baglio، نويسنده , , V. and Brunaccini، نويسنده , , G. and Briguglio، نويسنده , , N. and Stassi، نويسنده , , A. and Ornelas، نويسنده , , R. and Trifoni، نويسنده , , E. and Antonucci، نويسنده , , V. and Aricٍ، نويسنده , , A.S.، نويسنده ,
Abstract :
An optimization study of components and assembling characteristics for a proton exchange membrane (PEM) short stack electrolyzer (3 cells of 100 cm2 geometrical area) was carried out. The electrochemical properties were investigated by polarization, impedance spectroscopy and chrono-potentiometric measurements. A decrease of the ohmic contact resistance between the bipolar plates and the electrode backing layer was obtained by using an appropriate thickness for the gas diffusion layers/current collectors as well as by an optimization of stack compression. The amount of H2 produced was ∼90 l h−1 at 60 A (600 mA cm−2) and 75 °C under 300 W of applied electrical power. No significant leakage or gas recombination was observed. The stack electrical efficiency was 75% and 88%, at 60 A and 75 °C, with respect to the low and high heating value of hydrogen, respectively.
Keywords :
PEM electrolyzer , Stack , Hydrogen production , IrO2 catalyst , Oxygen evolution reaction , Water electrolysis
