Start–Stop Cyclic Durability Analysis of Membrane–Electrode Assemblies Using Polyflourene-Based Electrolytes for an Anion-Exchange Membrane Water Electrolyzer

Highly durable anion-exchange membranes and ionomers are essential for developing cost-effective green hydrogen generation. The membrane ionomer must withstand chemical attacks by OH– ions as well nonlinear mechanical stress caused irregular bubble formation when the electrolyzer is coupled with intermittent power sources. Herein, we examined durability of a trimethylammonium-modified poly(fluorene-alt-tetrafluorophenylene) (PFT-C10-TMA)-based under dynamic operation to evaluate its competency couple membrane–electrode assembly (MEA) prepared using these polymer was evaluated performing 1000 start–stop voltage cycles in 1 M KOH solution at 80 °C while varying applied cell voltage. electrochemical performances MEA electrodes were simultaneously an reference electrodes, structure before after test NMR techniques. based on commercial Sustainion XB-7 X37-50 RT showed catalyst leaching during cycles, resulting reduced performance. On other hand, MEAs PFT-C10-TMA demonstrated promising high operation, encouraging development electrolyzers that can function renewable