The effect of the piperidinium structure on anion-exchange membranes for applications in alkaline water electrolysis cells

Abstract

The effect of methyl and trifluoromethyl substituents and bonding positions of piperidinium groups on anion-exchange membranes was investigated for applications in alkaline water electrolysis cells.

Effect of Radical‐Mediated Cross‐Linking on Partially Fluorinated Aromatic Anion Exchange Membranes and their Applications in Alkaline Water Electrolysis Cells

“…The cell was assembled using Ni 0.8 Co 0.2 O and Pt/C for the anode and cathode catalysts, respectively. In Figure 10, the onset voltage was detected at 1.42 V that was in agreement with our previous work on different anion exchange membrane (1.44 V) [25] and that (≈1.45 V) obtained by rotating disk electrode for the similar NiCoO catalyst. [23] The cell achieved 1.67 V at 1.0 A cm À2 and 1.82 V at 2.0 A cm À2 .…”

“…[11,[28][29][30] Preparation of Membrane Electrode Assembly: A modified procedure to that in the literature was used. [25] The anode catalyst ink was prepared from homemade catalyst Ni-Co oxide (Ni 0.8 Co 0.2 O) [23] and in-house binder (QPAF-4, IEC = 1.5 meq g À1 ) [31] using methanol and pure water as solvents. First, the catalyst was suspended in methanol and stirred using a planetary ball mill for 30 min.…”

“…The current efficiency was 74% at 1.0 A cm À2 which was comparable to that of our previous partially fluorinated and uncross-linked anion exchange membrane (76%). [25] It seemed that the smaller water absorbability in the cross-linked xQPAF-C3-VB membrane did not affect the efficiency of the water electrolysis. The ohmic resistance at 1.0 A cm À2 of the current density was 103 mΩ cm 2 , which was higher than that (83 mΩ cm 2 ) estimated from the hydroxide ion conductivity (80 mS cm À1 ) at 80 °C and the thickness (57 μm) of x-QPAF-C3-VB membrane, presumably due to the interfacial resistance between the membrane and the catalyst layers.…”

Recent advancements in catalyst coated membranes for water electrolysis: a critical review

“…Ozawa et al studied a novel approach ''in situ ionomer-free CCMs for AEMWE'' It introduces a unique method for preparing ionomer-free CCMs, focusing on the direct growth of CLs on the anion exchange membrane (QBM-2.7). 99 Moreover, when paired with Ni0.8Co0.2O and Pt/C catalysts, the QBM-2.7 membrane achieved notable electrolysis performance, with an onset voltage of 1.44 V and a cell voltage of 1.62 V at 1.0 A cm 2 . This approach effectively reduces interfacial resistance and enhances catalyst utilization, leading to superior performance compared to traditional methods that us ionomers.…”

Poly(3‐hexylthiophene) film coated on plastic substrate as an organic photoanode for water oxidation/oxygen evolution with light illumination

“…The water‐splitting reaction to produce hydrogen and oxygen gases is one of sustainable chemistry pinnacles, and significant efforts have focused on the water electrolysis processes including the development of electrode materials and polymer separators and the use of the electricity generated by renewable energy sources such as sunlight and wind power 1–8 . Photocatalytic water splitting using inorganic n‐type metal oxide semiconductors has also been extensively investigated from the perspectives of bandgap engineering, cocatalyst incorporation, and nanostructured particles 9–11 .…”