Optimization of the membrane electrode assembly for an alkaline water electrolyser based on the catalyst-coated membrane

This study deals with the preparation and characterisation of catalyst-coated membranes for an alkaline water electrolysis process. For this purpose, a chloromethylated anion-selective block copolymer styrene-ethylene-butylene-styrene 1,4-diazabicyclo[2.2.2]octane functional groups was used both as polymer electrolyte membrane ionomer binder. Non-PGM catalysts (platinum group metals), specifically NiCo2O4 NiFe2O4, were on anode cathode side membrane, respectively. Air-brush deposition or computer-controlled ultrasonic dispersion catalytic ink to deposit catalyst layers. The influence composition layer its stability resulting cell performance investigated under typical conditions (1–15 wt.% KOH, 45 °C). optimal catalyst-to-binder ratio in identified 93/7 using loading 2.5 mg cm-2 each membrane. electrode assembly prepared showed high over 140 h at current density 250 mA cm-2. At load, exhibited voltage 2.025 ± 0.010 V. increase observed during test did not exceed 1 μV h-1.